/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:02:31,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:02:31,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:02:31,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:02:31,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:02:31,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:02:31,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:02:31,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:02:31,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:02:31,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:02:31,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:02:31,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:02:31,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:02:31,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:02:31,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:02:31,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:02:31,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:02:31,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:02:31,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:02:31,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:02:31,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:02:31,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:02:31,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:02:31,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:02:31,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:02:31,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:02:31,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:02:31,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:02:31,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:02:31,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:02:31,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:02:31,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:02:31,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:02:31,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:02:31,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:02:31,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:02:31,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:02:31,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:02:31,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:02:31,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:02:31,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:02:31,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 09:02:31,180 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:02:31,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:02:31,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:02:31,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:02:31,186 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:02:31,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:02:31,186 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:02:31,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:02:31,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:02:31,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:02:31,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:02:31,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:02:31,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:02:31,187 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:02:31,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:02:31,188 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:02:31,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:02:31,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:02:31,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:02:31,188 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:02:31,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:02:31,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:02:31,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:02:31,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:02:31,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:02:31,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:02:31,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:02:31,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:02:31,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:02:31,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:02:31,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:02:31,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:02:31,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:02:31,645 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:02:31,645 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:02:31,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2020-10-28 09:02:31,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96f371dba/1a469b671fef42d7977fb06c50531781/FLAG3fb061a9b [2020-10-28 09:02:32,430 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:02:32,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2020-10-28 09:02:32,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96f371dba/1a469b671fef42d7977fb06c50531781/FLAG3fb061a9b [2020-10-28 09:02:32,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96f371dba/1a469b671fef42d7977fb06c50531781 [2020-10-28 09:02:32,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:02:32,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:02:32,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:02:32,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:02:32,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:02:32,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:02:32" (1/1) ... [2020-10-28 09:02:32,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f66cf56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:32, skipping insertion in model container [2020-10-28 09:02:32,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:02:32" (1/1) ... [2020-10-28 09:02:32,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:02:32,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:02:32,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:02:33,000 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:02:33,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:02:33,044 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:02:33,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:33 WrapperNode [2020-10-28 09:02:33,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:02:33,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:02:33,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:02:33,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:02:33,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:33" (1/1) ... [2020-10-28 09:02:33,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:33" (1/1) ... [2020-10-28 09:02:33,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:33" (1/1) ... [2020-10-28 09:02:33,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:33" (1/1) ... [2020-10-28 09:02:33,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:33" (1/1) ... [2020-10-28 09:02:33,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:33" (1/1) ... [2020-10-28 09:02:33,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:33" (1/1) ... [2020-10-28 09:02:33,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:02:33,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:02:33,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:02:33,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:02:33,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:02:33,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:02:33,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:02:33,187 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:02:33,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:02:33,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:02:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:02:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:02:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:02:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:02:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:02:33,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:02:33,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:02:33,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:02:33,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:02:33,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:02:33,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:02:33,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:02:33,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:02:33,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:02:33,766 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:02:33,767 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-28 09:02:33,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:02:33 BoogieIcfgContainer [2020-10-28 09:02:33,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:02:33,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:02:33,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:02:33,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:02:33,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:02:32" (1/3) ... [2020-10-28 09:02:33,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30df5e87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:02:33, skipping insertion in model container [2020-10-28 09:02:33,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:33" (2/3) ... [2020-10-28 09:02:33,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30df5e87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:02:33, skipping insertion in model container [2020-10-28 09:02:33,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:02:33" (3/3) ... [2020-10-28 09:02:33,778 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2020-10-28 09:02:33,792 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:02:33,798 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:02:33,814 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:02:33,847 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:02:33,847 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:02:33,847 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:02:33,847 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:02:33,847 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:02:33,848 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:02:33,848 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:02:33,848 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:02:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-28 09:02:33,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:02:33,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:33,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:33,877 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:33,884 INFO L82 PathProgramCache]: Analyzing trace with hash 214825398, now seen corresponding path program 1 times [2020-10-28 09:02:33,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:33,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023909838] [2020-10-28 09:02:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:34,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:34,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:34,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:34,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:34,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:34,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:35,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:02:35,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:35,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1599 [2020-10-28 09:02:35,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:35,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 09:02:35,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:35,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:02:35,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:35,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:35,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:35,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:35,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:02:35,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:35,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:35,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:35,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:35,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:02:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:02:35,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023909838] [2020-10-28 09:02:35,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:02:35,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:02:35,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157102236] [2020-10-28 09:02:35,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:02:35,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:35,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:02:35,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:02:35,850 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-28 09:02:36,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:36,025 INFO L93 Difference]: Finished difference Result 66 states and 96 transitions. [2020-10-28 09:02:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:02:36,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-28 09:02:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:36,036 INFO L225 Difference]: With dead ends: 66 [2020-10-28 09:02:36,036 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 09:02:36,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:02:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 09:02:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 09:02:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:02:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-28 09:02:36,098 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2020-10-28 09:02:36,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:36,099 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-28 09:02:36,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:02:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-28 09:02:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:02:36,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:36,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:36,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:02:36,102 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:36,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:36,103 INFO L82 PathProgramCache]: Analyzing trace with hash -903446094, now seen corresponding path program 1 times [2020-10-28 09:02:36,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:36,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787433539] [2020-10-28 09:02:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:36,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:37,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:02:37,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:37,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-28 09:02:37,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:37,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:02:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:02:37,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:02:37,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 09:02:37,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:37,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:37,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:37,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:37,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:37,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:37,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:37,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:37,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:37,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:37,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:02:37,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787433539] [2020-10-28 09:02:37,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:02:37,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:02:37,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14293818] [2020-10-28 09:02:37,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:02:37,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:37,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:02:37,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:02:37,460 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2020-10-28 09:02:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:37,673 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-10-28 09:02:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:02:37,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 09:02:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:37,674 INFO L225 Difference]: With dead ends: 59 [2020-10-28 09:02:37,675 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 09:02:37,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:02:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 09:02:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 09:02:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 09:02:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 09:02:37,697 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2020-10-28 09:02:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:37,700 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 09:02:37,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:02:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 09:02:37,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:02:37,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:37,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:37,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:02:37,702 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:37,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:37,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1214100017, now seen corresponding path program 1 times [2020-10-28 09:02:37,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:37,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552891219] [2020-10-28 09:02:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:37,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:40,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:42,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:42,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 09:02:42,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:02:42,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:02:42,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:42,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:42,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:02:42,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 09:02:42,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:02:42,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:42,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:42,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:42,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:42,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:42,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:42,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:42,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:42,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:42,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:02:42,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552891219] [2020-10-28 09:02:42,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:42,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:02:42,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299386687] [2020-10-28 09:02:42,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:02:42,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:42,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:02:42,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:02:42,812 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 5 states. [2020-10-28 09:02:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:43,042 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2020-10-28 09:02:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:02:43,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-28 09:02:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:43,044 INFO L225 Difference]: With dead ends: 70 [2020-10-28 09:02:43,044 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 09:02:43,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:02:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 09:02:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 09:02:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:02:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-28 09:02:43,054 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 31 [2020-10-28 09:02:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:43,054 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-28 09:02:43,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:02:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-28 09:02:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 09:02:43,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:43,056 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:43,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:02:43,057 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1678914002, now seen corresponding path program 2 times [2020-10-28 09:02:43,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:43,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366946442] [2020-10-28 09:02:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:43,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:43,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:43,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:43,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:43,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:43,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:48,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:48,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 09:02:48,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:48,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:02:48,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:48,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:02:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:02:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:02:48,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:48,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:48,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:48,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:48,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:48,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:48,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:48,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:48,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:48,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:48,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:48,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:48,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:02:48,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366946442] [2020-10-28 09:02:48,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:48,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:02:48,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393539416] [2020-10-28 09:02:48,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:02:48,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:48,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:02:48,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:02:48,195 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 6 states. [2020-10-28 09:02:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:48,468 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-10-28 09:02:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:02:48,469 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-28 09:02:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:48,470 INFO L225 Difference]: With dead ends: 81 [2020-10-28 09:02:48,470 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 09:02:48,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:02:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 09:02:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 09:02:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:02:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-28 09:02:48,499 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2020-10-28 09:02:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:48,500 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-28 09:02:48,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:02:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-28 09:02:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:02:48,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:48,503 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:48,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:02:48,505 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:48,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:48,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1997413423, now seen corresponding path program 3 times [2020-10-28 09:02:48,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:48,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497516622] [2020-10-28 09:02:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:48,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:48,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:48,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:48,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:48,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:50,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:53,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:53,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 09:02:53,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:53,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:02:53,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:53,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:53,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:02:53,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 09:02:53,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:02:53,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:53,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:53,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:53,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:53,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:53,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:53,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:02:53,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:53,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:53,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:53,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:53,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:53,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:02:53,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497516622] [2020-10-28 09:02:53,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:53,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:02:53,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268222075] [2020-10-28 09:02:53,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:02:53,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:02:53,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:02:53,679 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 7 states. [2020-10-28 09:02:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:53,889 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2020-10-28 09:02:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:02:53,890 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-28 09:02:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:53,891 INFO L225 Difference]: With dead ends: 92 [2020-10-28 09:02:53,891 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 09:02:53,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:02:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 09:02:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 09:02:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:02:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-28 09:02:53,912 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2020-10-28 09:02:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:53,913 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-28 09:02:53,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:02:53,913 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-28 09:02:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 09:02:53,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:53,914 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:53,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:02:53,915 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:53,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1075963406, now seen corresponding path program 4 times [2020-10-28 09:02:53,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:53,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171761604] [2020-10-28 09:02:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:53,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:54,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:54,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:54,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:54,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:56,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:58,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:58,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 09:02:58,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:58,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:02:58,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:58,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:58,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:02:58,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:58,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:02:58,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:59,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:59,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:59,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:59,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:59,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:59,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:02:59,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:59,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:59,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 09:02:59,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171761604] [2020-10-28 09:02:59,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:59,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:02:59,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369315091] [2020-10-28 09:02:59,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:02:59,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:59,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:02:59,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:02:59,086 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 8 states. [2020-10-28 09:02:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:59,460 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-10-28 09:02:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:02:59,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-28 09:02:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:59,464 INFO L225 Difference]: With dead ends: 103 [2020-10-28 09:02:59,464 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 09:02:59,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:02:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 09:02:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 09:02:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:02:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-28 09:02:59,484 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 49 [2020-10-28 09:02:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:59,485 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-28 09:02:59,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:02:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-28 09:02:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 09:02:59,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:59,489 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:59,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:02:59,490 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:59,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1984295567, now seen corresponding path program 5 times [2020-10-28 09:02:59,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:59,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191965928] [2020-10-28 09:02:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:59,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:59,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:59,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:59,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:59,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:04,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:04,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:03:04,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:03:04,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:03:04,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:04,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:04,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:03:04,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 09:03:04,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:03:04,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:04,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:04,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:04,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:04,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:04,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:04,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:04,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:04,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:04,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:04,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:04,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:04,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-28 09:03:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191965928] [2020-10-28 09:03:04,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:04,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:03:04,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478143955] [2020-10-28 09:03:04,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:03:04,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:04,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:03:04,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:04,664 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 9 states. [2020-10-28 09:03:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:04,894 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2020-10-28 09:03:04,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:03:04,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-28 09:03:04,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:04,895 INFO L225 Difference]: With dead ends: 114 [2020-10-28 09:03:04,896 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 09:03:04,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:04,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 09:03:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-28 09:03:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 09:03:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-10-28 09:03:04,905 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 55 [2020-10-28 09:03:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:04,906 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-10-28 09:03:04,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:03:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-10-28 09:03:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:03:04,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:04,907 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:04,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:03:04,907 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1472739858, now seen corresponding path program 6 times [2020-10-28 09:03:04,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:04,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729448853] [2020-10-28 09:03:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:04,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:04,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:05,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:05,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:05,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:09,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:09,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:03:09,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:09,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:03:09,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:09,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:09,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:03:09,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:03:09,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:03:09,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:10,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:10,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:10,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:10,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:10,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:10,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:10,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:10,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:10,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:10,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:10,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:10,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-28 09:03:10,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729448853] [2020-10-28 09:03:10,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:10,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:03:10,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120432133] [2020-10-28 09:03:10,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:03:10,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:10,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:03:10,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:03:10,093 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 10 states. [2020-10-28 09:03:10,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:10,353 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-10-28 09:03:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:03:10,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-28 09:03:10,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:10,355 INFO L225 Difference]: With dead ends: 125 [2020-10-28 09:03:10,355 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:03:10,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:03:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:03:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-28 09:03:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:03:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-10-28 09:03:10,379 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 61 [2020-10-28 09:03:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:10,379 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-10-28 09:03:10,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:03:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-10-28 09:03:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:03:10,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:10,381 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:10,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:03:10,383 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:10,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:10,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1747701999, now seen corresponding path program 7 times [2020-10-28 09:03:10,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:10,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098183398] [2020-10-28 09:03:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:10,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:10,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:10,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:15,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:15,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:03:15,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:15,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:03:15,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:15,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:15,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:03:15,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:15,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:03:15,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:15,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:15,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:15,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:15,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:15,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:15,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:03:15,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:15,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:15,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:15,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:15,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:15,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-28 09:03:15,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098183398] [2020-10-28 09:03:15,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:15,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:03:15,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275446523] [2020-10-28 09:03:15,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:03:15,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:15,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:03:15,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:03:15,577 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 11 states. [2020-10-28 09:03:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:15,889 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2020-10-28 09:03:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:03:15,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-28 09:03:15,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:15,891 INFO L225 Difference]: With dead ends: 136 [2020-10-28 09:03:15,891 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:03:15,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:03:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:03:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-28 09:03:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:03:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-28 09:03:15,908 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 67 [2020-10-28 09:03:15,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:15,908 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-28 09:03:15,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:03:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-28 09:03:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:03:15,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:15,910 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:15,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:03:15,916 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:15,916 INFO L82 PathProgramCache]: Analyzing trace with hash -141651406, now seen corresponding path program 8 times [2020-10-28 09:03:15,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:15,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279588137] [2020-10-28 09:03:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:15,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:16,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:16,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:16,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:16,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:20,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:20,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:03:20,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:20,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:03:20,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:20,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:20,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:03:20,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:03:20,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:03:20,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:21,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:21,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:21,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:21,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:21,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:21,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:21,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:21,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:21,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:21,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:21,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:21,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-28 09:03:21,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279588137] [2020-10-28 09:03:21,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:21,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:03:21,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792688821] [2020-10-28 09:03:21,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:03:21,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:21,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:03:21,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:03:21,118 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 12 states. [2020-10-28 09:03:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:21,398 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2020-10-28 09:03:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:03:21,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-10-28 09:03:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:21,399 INFO L225 Difference]: With dead ends: 147 [2020-10-28 09:03:21,399 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 09:03:21,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:03:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 09:03:21,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-28 09:03:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:03:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-10-28 09:03:21,421 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 73 [2020-10-28 09:03:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:21,421 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-10-28 09:03:21,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:03:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-10-28 09:03:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 09:03:21,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:21,427 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:21,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:03:21,427 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:21,428 INFO L82 PathProgramCache]: Analyzing trace with hash -836651185, now seen corresponding path program 9 times [2020-10-28 09:03:21,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:21,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181167477] [2020-10-28 09:03:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:21,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:21,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:21,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:21,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:21,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:26,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:26,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:03:26,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:26,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:03:26,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:26,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:26,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:03:26,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 09:03:26,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:03:26,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:26,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:26,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:26,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:26,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:26,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:26,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:26,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:26,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:26,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:26,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:26,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:26,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:03:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 09:03:26,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181167477] [2020-10-28 09:03:26,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:26,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:03:26,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101625806] [2020-10-28 09:03:26,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:03:26,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:26,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:03:26,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:03:26,657 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 13 states. [2020-10-28 09:03:27,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:27,043 INFO L93 Difference]: Finished difference Result 158 states and 175 transitions. [2020-10-28 09:03:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:03:27,044 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-10-28 09:03:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:27,045 INFO L225 Difference]: With dead ends: 158 [2020-10-28 09:03:27,045 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 09:03:27,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:03:27,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 09:03:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-28 09:03:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 09:03:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-10-28 09:03:27,070 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 79 [2020-10-28 09:03:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:27,070 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-10-28 09:03:27,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:03:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-10-28 09:03:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:03:27,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:27,076 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:27,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:03:27,078 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:27,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1670438318, now seen corresponding path program 10 times [2020-10-28 09:03:27,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:27,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191737737] [2020-10-28 09:03:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:27,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:27,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:27,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:27,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:27,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:32,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:32,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 09:03:32,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:32,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:03:32,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:32,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:03:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:03:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:03:32,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:32,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:32,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:32,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:32,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:32,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:32,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:32,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:32,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:32,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:32,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:32,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:32,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-28 09:03:32,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191737737] [2020-10-28 09:03:32,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:32,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:03:32,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979547661] [2020-10-28 09:03:32,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:03:32,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:32,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:03:32,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:03:32,325 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 14 states. [2020-10-28 09:03:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:32,576 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2020-10-28 09:03:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:03:32,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-10-28 09:03:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:32,578 INFO L225 Difference]: With dead ends: 169 [2020-10-28 09:03:32,578 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 09:03:32,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:03:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 09:03:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-28 09:03:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:03:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2020-10-28 09:03:32,591 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 85 [2020-10-28 09:03:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:32,594 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2020-10-28 09:03:32,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:03:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2020-10-28 09:03:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 09:03:32,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:32,596 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:32,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:03:32,596 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash 403285423, now seen corresponding path program 11 times [2020-10-28 09:03:32,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:32,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480852211] [2020-10-28 09:03:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:32,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:32,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:32,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:32,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:35,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:03:37,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:37,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:03:37,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:37,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:37,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:37,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:37,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:37,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:37,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:03:37,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:37,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:37,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:37,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:37,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:37,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:03:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 09:03:37,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480852211] [2020-10-28 09:03:37,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:37,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:03:37,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687280064] [2020-10-28 09:03:37,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:03:37,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:37,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:03:37,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:03:37,847 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 15 states. [2020-10-28 09:03:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:38,166 INFO L93 Difference]: Finished difference Result 180 states and 197 transitions. [2020-10-28 09:03:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:03:38,166 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 91 [2020-10-28 09:03:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:38,167 INFO L225 Difference]: With dead ends: 180 [2020-10-28 09:03:38,167 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 09:03:38,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:03:38,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 09:03:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-28 09:03:38,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 09:03:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2020-10-28 09:03:38,182 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 91 [2020-10-28 09:03:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:38,182 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2020-10-28 09:03:38,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:03:38,183 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2020-10-28 09:03:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 09:03:38,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:38,184 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:38,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:03:38,184 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:38,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1428679282, now seen corresponding path program 12 times [2020-10-28 09:03:38,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:38,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597254855] [2020-10-28 09:03:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:38,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:38,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:38,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:38,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:43,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:43,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 09:03:43,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:43,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:03:43,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:43,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:03:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:03:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:03:43,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:43,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:43,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:43,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:43,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:43,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:43,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:43,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:43,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:43,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:43,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:43,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:43,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-10-28 09:03:43,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597254855] [2020-10-28 09:03:43,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:43,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:03:43,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826629780] [2020-10-28 09:03:43,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:03:43,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:43,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:03:43,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:03:43,457 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand 16 states. [2020-10-28 09:03:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:43,737 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2020-10-28 09:03:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:03:43,738 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-10-28 09:03:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:43,739 INFO L225 Difference]: With dead ends: 191 [2020-10-28 09:03:43,739 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 09:03:43,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:03:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 09:03:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-28 09:03:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 09:03:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2020-10-28 09:03:43,747 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 97 [2020-10-28 09:03:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:43,747 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2020-10-28 09:03:43,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:03:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2020-10-28 09:03:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 09:03:43,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:43,748 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:43,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:03:43,748 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1002071025, now seen corresponding path program 13 times [2020-10-28 09:03:43,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:43,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757553442] [2020-10-28 09:03:43,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:43,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:43,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:43,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:43,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:47,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:48,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:48,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 09:03:48,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:48,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:03:48,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:48,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:48,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:03:48,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 09:03:48,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:03:48,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:49,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:49,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:49,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:49,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:49,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:49,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:49,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:49,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:49,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:49,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:49,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:49,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-10-28 09:03:49,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757553442] [2020-10-28 09:03:49,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:49,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:03:49,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520223937] [2020-10-28 09:03:49,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:03:49,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:49,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:03:49,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:03:49,044 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand 17 states. [2020-10-28 09:03:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:49,373 INFO L93 Difference]: Finished difference Result 202 states and 219 transitions. [2020-10-28 09:03:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:03:49,374 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 103 [2020-10-28 09:03:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:49,375 INFO L225 Difference]: With dead ends: 202 [2020-10-28 09:03:49,375 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 09:03:49,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:03:49,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 09:03:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-28 09:03:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 09:03:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2020-10-28 09:03:49,383 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 103 [2020-10-28 09:03:49,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:49,384 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2020-10-28 09:03:49,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:03:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2020-10-28 09:03:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 09:03:49,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:49,385 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:49,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:03:49,385 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash 569830034, now seen corresponding path program 14 times [2020-10-28 09:03:49,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:49,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692833369] [2020-10-28 09:03:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:49,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:49,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:49,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:54,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:54,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:54,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 09:03:54,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:54,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:03:54,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:54,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:03:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 09:03:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:03:54,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:54,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:54,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:54,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:54,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:54,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:54,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:54,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:54,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:54,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:54,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:54,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:54,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2020-10-28 09:03:54,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692833369] [2020-10-28 09:03:54,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:54,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:03:54,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17667945] [2020-10-28 09:03:54,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:03:54,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:54,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:03:54,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:03:54,734 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand 18 states. [2020-10-28 09:03:55,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:55,059 INFO L93 Difference]: Finished difference Result 213 states and 230 transitions. [2020-10-28 09:03:55,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:03:55,059 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-10-28 09:03:55,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:55,060 INFO L225 Difference]: With dead ends: 213 [2020-10-28 09:03:55,060 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 09:03:55,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:03:55,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 09:03:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-28 09:03:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 09:03:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2020-10-28 09:03:55,071 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 109 [2020-10-28 09:03:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:55,071 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2020-10-28 09:03:55,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:03:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2020-10-28 09:03:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 09:03:55,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:55,072 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:55,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:03:55,072 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2142739055, now seen corresponding path program 15 times [2020-10-28 09:03:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:55,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945297018] [2020-10-28 09:03:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:55,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:55,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:55,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:55,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:00,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:00,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 09:04:00,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:00,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:04:00,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:00,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:04:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 09:04:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:04:00,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:00,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:00,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:00,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:00,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:00,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:00,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:00,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:00,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:00,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:00,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:00,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:00,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-28 09:04:00,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945297018] [2020-10-28 09:04:00,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:00,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:04:00,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464301451] [2020-10-28 09:04:00,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:04:00,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:00,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:04:00,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:04:00,420 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand 19 states. [2020-10-28 09:04:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:00,816 INFO L93 Difference]: Finished difference Result 224 states and 241 transitions. [2020-10-28 09:04:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:04:00,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 115 [2020-10-28 09:04:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:00,818 INFO L225 Difference]: With dead ends: 224 [2020-10-28 09:04:00,818 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 09:04:00,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:04:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 09:04:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-28 09:04:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 09:04:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2020-10-28 09:04:00,832 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 115 [2020-10-28 09:04:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:00,832 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2020-10-28 09:04:00,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:04:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2020-10-28 09:04:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 09:04:00,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:00,834 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:00,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:04:00,835 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:00,836 INFO L82 PathProgramCache]: Analyzing trace with hash -728096078, now seen corresponding path program 16 times [2020-10-28 09:04:00,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:00,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234264069] [2020-10-28 09:04:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:00,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:01,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:01,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:05,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:05,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 09:04:05,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:05,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:04:05,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:05,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:05,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:04:05,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:04:05,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:04:05,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:06,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:06,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:06,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:06,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:06,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:06,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:06,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:06,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:06,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:06,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:06,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:06,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2020-10-28 09:04:06,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234264069] [2020-10-28 09:04:06,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:06,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:04:06,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066356525] [2020-10-28 09:04:06,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:04:06,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:06,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:04:06,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:04:06,244 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand 20 states. [2020-10-28 09:04:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:06,667 INFO L93 Difference]: Finished difference Result 235 states and 252 transitions. [2020-10-28 09:04:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:04:06,668 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 121 [2020-10-28 09:04:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:06,669 INFO L225 Difference]: With dead ends: 235 [2020-10-28 09:04:06,669 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 09:04:06,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:04:06,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 09:04:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-28 09:04:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 09:04:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2020-10-28 09:04:06,679 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 121 [2020-10-28 09:04:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:06,679 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2020-10-28 09:04:06,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:04:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2020-10-28 09:04:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 09:04:06,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:06,681 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:06,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:04:06,681 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:06,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1170317519, now seen corresponding path program 17 times [2020-10-28 09:04:06,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:06,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012955261] [2020-10-28 09:04:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:06,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:06,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:06,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:06,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:11,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:11,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 09:04:11,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:11,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 09:04:11,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:11,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:11,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:04:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 09:04:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:04:11,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:12,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:12,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:12,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:12,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:12,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:12,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:12,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:12,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:12,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:12,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:12,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:12,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2020-10-28 09:04:12,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012955261] [2020-10-28 09:04:12,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:12,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:04:12,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788278267] [2020-10-28 09:04:12,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:04:12,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:12,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:04:12,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:04:12,064 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand 21 states. [2020-10-28 09:04:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:12,501 INFO L93 Difference]: Finished difference Result 246 states and 263 transitions. [2020-10-28 09:04:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:04:12,502 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 127 [2020-10-28 09:04:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:12,503 INFO L225 Difference]: With dead ends: 246 [2020-10-28 09:04:12,503 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 09:04:12,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:04:12,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 09:04:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-28 09:04:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 09:04:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2020-10-28 09:04:12,513 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 127 [2020-10-28 09:04:12,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:12,514 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2020-10-28 09:04:12,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:04:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2020-10-28 09:04:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 09:04:12,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:12,515 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:12,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:04:12,516 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:12,516 INFO L82 PathProgramCache]: Analyzing trace with hash -263220526, now seen corresponding path program 18 times [2020-10-28 09:04:12,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:12,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375890625] [2020-10-28 09:04:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:12,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:12,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:12,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:12,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:17,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:17,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 09:04:17,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:17,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:04:17,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:17,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:04:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:04:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:04:17,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:17,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:17,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:17,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:17,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:17,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:17,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:17,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:17,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-10-28 09:04:17,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375890625] [2020-10-28 09:04:17,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:17,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:04:17,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617110278] [2020-10-28 09:04:17,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:04:17,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:04:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:04:17,920 INFO L87 Difference]: Start difference. First operand 138 states and 144 transitions. Second operand 22 states. [2020-10-28 09:04:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:18,339 INFO L93 Difference]: Finished difference Result 257 states and 274 transitions. [2020-10-28 09:04:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:04:18,340 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 133 [2020-10-28 09:04:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:18,341 INFO L225 Difference]: With dead ends: 257 [2020-10-28 09:04:18,342 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 09:04:18,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:04:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 09:04:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-28 09:04:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 09:04:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 150 transitions. [2020-10-28 09:04:18,352 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 150 transitions. Word has length 133 [2020-10-28 09:04:18,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:18,352 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 150 transitions. [2020-10-28 09:04:18,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:04:18,352 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 150 transitions. [2020-10-28 09:04:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 09:04:18,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:18,354 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:18,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:04:18,354 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:18,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:18,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2142916817, now seen corresponding path program 19 times [2020-10-28 09:04:18,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:18,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006157210] [2020-10-28 09:04:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:18,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:18,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:18,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:18,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:23,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:23,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 09:04:23,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:23,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:04:23,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:23,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:23,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:04:23,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:23,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:04:23,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:23,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:23,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:23,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:23,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:23,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:23,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:23,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:23,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:23,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:23,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:23,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:23,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-28 09:04:23,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006157210] [2020-10-28 09:04:23,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:23,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:04:23,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356178031] [2020-10-28 09:04:23,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:04:23,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:23,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:04:23,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:04:23,811 INFO L87 Difference]: Start difference. First operand 144 states and 150 transitions. Second operand 23 states. [2020-10-28 09:04:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:24,328 INFO L93 Difference]: Finished difference Result 268 states and 285 transitions. [2020-10-28 09:04:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:04:24,329 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2020-10-28 09:04:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:24,331 INFO L225 Difference]: With dead ends: 268 [2020-10-28 09:04:24,331 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 09:04:24,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:04:24,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 09:04:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-28 09:04:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 09:04:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 156 transitions. [2020-10-28 09:04:24,342 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 156 transitions. Word has length 139 [2020-10-28 09:04:24,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:24,342 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 156 transitions. [2020-10-28 09:04:24,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:04:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 156 transitions. [2020-10-28 09:04:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 09:04:24,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:24,344 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:24,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:04:24,344 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:24,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:24,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1982514446, now seen corresponding path program 20 times [2020-10-28 09:04:24,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:24,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210089659] [2020-10-28 09:04:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:24,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:24,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:24,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:24,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:29,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:29,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-28 09:04:29,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:29,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:04:29,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:29,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:29,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:04:29,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 09:04:29,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:04:29,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:29,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:29,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:29,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:29,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:29,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:29,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:04:29,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:29,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:29,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:29,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:29,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:29,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-10-28 09:04:29,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210089659] [2020-10-28 09:04:29,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:29,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:04:29,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544281016] [2020-10-28 09:04:29,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:04:29,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:29,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:04:29,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:04:29,836 INFO L87 Difference]: Start difference. First operand 150 states and 156 transitions. Second operand 24 states. [2020-10-28 09:04:30,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:30,350 INFO L93 Difference]: Finished difference Result 279 states and 296 transitions. [2020-10-28 09:04:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:04:30,354 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 145 [2020-10-28 09:04:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:30,355 INFO L225 Difference]: With dead ends: 279 [2020-10-28 09:04:30,355 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 09:04:30,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:04:30,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 09:04:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-28 09:04:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 09:04:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2020-10-28 09:04:30,365 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 145 [2020-10-28 09:04:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:30,366 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2020-10-28 09:04:30,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:04:30,366 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2020-10-28 09:04:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 09:04:30,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:30,368 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:30,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:04:30,368 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:30,369 INFO L82 PathProgramCache]: Analyzing trace with hash 665175439, now seen corresponding path program 21 times [2020-10-28 09:04:30,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:30,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700574822] [2020-10-28 09:04:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:30,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:30,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:30,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:30,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:35,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:35,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 09:04:35,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:35,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:04:35,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:35,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:35,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:04:35,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 09:04:35,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:04:35,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:35,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:35,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:35,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:35,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:35,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:35,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:35,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:35,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:35,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:35,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:35,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:35,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-28 09:04:35,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700574822] [2020-10-28 09:04:35,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:35,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:04:35,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330788772] [2020-10-28 09:04:35,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:04:35,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:04:35,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:04:35,892 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand 25 states. [2020-10-28 09:04:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:36,358 INFO L93 Difference]: Finished difference Result 290 states and 307 transitions. [2020-10-28 09:04:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:04:36,359 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 151 [2020-10-28 09:04:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:36,360 INFO L225 Difference]: With dead ends: 290 [2020-10-28 09:04:36,360 INFO L226 Difference]: Without dead ends: 162 [2020-10-28 09:04:36,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:04:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-28 09:04:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-28 09:04:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 09:04:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 168 transitions. [2020-10-28 09:04:36,370 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 168 transitions. Word has length 151 [2020-10-28 09:04:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:36,371 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 168 transitions. [2020-10-28 09:04:36,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:04:36,371 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 168 transitions. [2020-10-28 09:04:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-28 09:04:36,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:36,375 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:36,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:04:36,378 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:36,379 INFO L82 PathProgramCache]: Analyzing trace with hash 661199634, now seen corresponding path program 22 times [2020-10-28 09:04:36,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:36,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505874140] [2020-10-28 09:04:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:36,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:36,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:36,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:36,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:41,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:41,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-28 09:04:41,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:41,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:04:41,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:41,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:41,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:04:41,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 09:04:41,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:04:41,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:41,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:41,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:41,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:41,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:41,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:41,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:41,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:41,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:41,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:41,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:41,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:41,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-28 09:04:41,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505874140] [2020-10-28 09:04:41,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:41,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:04:41,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201523861] [2020-10-28 09:04:41,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:04:41,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:41,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:04:41,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:04:41,962 INFO L87 Difference]: Start difference. First operand 162 states and 168 transitions. Second operand 26 states. [2020-10-28 09:04:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:42,399 INFO L93 Difference]: Finished difference Result 301 states and 318 transitions. [2020-10-28 09:04:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:04:42,401 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 157 [2020-10-28 09:04:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:42,402 INFO L225 Difference]: With dead ends: 301 [2020-10-28 09:04:42,402 INFO L226 Difference]: Without dead ends: 168 [2020-10-28 09:04:42,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:04:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-28 09:04:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-28 09:04:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 09:04:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2020-10-28 09:04:42,411 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 157 [2020-10-28 09:04:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:42,411 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2020-10-28 09:04:42,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:04:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2020-10-28 09:04:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-28 09:04:42,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:42,413 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:42,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:04:42,413 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:42,414 INFO L82 PathProgramCache]: Analyzing trace with hash -490478609, now seen corresponding path program 23 times [2020-10-28 09:04:42,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:42,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437607574] [2020-10-28 09:04:42,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:42,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:42,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:42,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:42,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:47,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:47,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-28 09:04:47,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:47,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 09:04:47,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:47,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:47,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:04:47,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 09:04:47,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:04:47,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:47,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:47,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:47,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:47,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:47,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:47,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:47,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:47,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:47,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:47,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:47,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:47,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2020-10-28 09:04:48,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437607574] [2020-10-28 09:04:48,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:48,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:04:48,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446497294] [2020-10-28 09:04:48,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:04:48,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:48,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:04:48,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:04:48,029 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand 27 states. [2020-10-28 09:04:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:48,471 INFO L93 Difference]: Finished difference Result 312 states and 329 transitions. [2020-10-28 09:04:48,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:04:48,472 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 163 [2020-10-28 09:04:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:48,473 INFO L225 Difference]: With dead ends: 312 [2020-10-28 09:04:48,473 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 09:04:48,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:04:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 09:04:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-10-28 09:04:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 09:04:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2020-10-28 09:04:48,483 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 163 [2020-10-28 09:04:48,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:48,483 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2020-10-28 09:04:48,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:04:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2020-10-28 09:04:48,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 09:04:48,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:48,486 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:48,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:04:48,486 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:48,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:48,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1597426894, now seen corresponding path program 24 times [2020-10-28 09:04:48,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:48,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720607444] [2020-10-28 09:04:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:48,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:48,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:48,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:48,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:53,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:53,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 09:04:53,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:53,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 09:04:53,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:53,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:04:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 09:04:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:04:53,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:54,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:54,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:54,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:54,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:54,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:54,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:54,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:54,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:54,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:54,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:54,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:54,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2020-10-28 09:04:54,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720607444] [2020-10-28 09:04:54,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:54,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:04:54,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228200187] [2020-10-28 09:04:54,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:04:54,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:54,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:04:54,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:04:54,178 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand 28 states. [2020-10-28 09:04:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:54,639 INFO L93 Difference]: Finished difference Result 323 states and 340 transitions. [2020-10-28 09:04:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:04:54,639 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 169 [2020-10-28 09:04:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:54,641 INFO L225 Difference]: With dead ends: 323 [2020-10-28 09:04:54,641 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 09:04:54,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:04:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 09:04:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-28 09:04:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-28 09:04:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2020-10-28 09:04:54,651 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 169 [2020-10-28 09:04:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:54,652 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2020-10-28 09:04:54,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:04:54,652 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2020-10-28 09:04:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-28 09:04:54,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:54,653 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:54,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:04:54,653 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:54,654 INFO L82 PathProgramCache]: Analyzing trace with hash 654445135, now seen corresponding path program 25 times [2020-10-28 09:04:54,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:54,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501759760] [2020-10-28 09:04:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:54,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:54,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:55,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:55,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:59,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:59,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-28 09:04:59,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:59,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:04:59,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:59,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:04:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:04:59,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:00,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:00,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:00,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:00,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:00,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:00,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:05:00,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:00,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:00,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:00,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:00,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:00,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2020-10-28 09:05:00,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501759760] [2020-10-28 09:05:00,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:00,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:05:00,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329983317] [2020-10-28 09:05:00,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:05:00,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:00,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:05:00,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:05:00,442 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand 29 states. [2020-10-28 09:05:01,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:01,048 INFO L93 Difference]: Finished difference Result 334 states and 351 transitions. [2020-10-28 09:05:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:05:01,049 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 175 [2020-10-28 09:05:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:01,050 INFO L225 Difference]: With dead ends: 334 [2020-10-28 09:05:01,050 INFO L226 Difference]: Without dead ends: 186 [2020-10-28 09:05:01,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:05:01,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-28 09:05:01,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-28 09:05:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 09:05:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 192 transitions. [2020-10-28 09:05:01,061 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 192 transitions. Word has length 175 [2020-10-28 09:05:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:01,062 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 192 transitions. [2020-10-28 09:05:01,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:05:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 192 transitions. [2020-10-28 09:05:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-28 09:05:01,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:01,063 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:01,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:05:01,064 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:01,064 INFO L82 PathProgramCache]: Analyzing trace with hash -13401262, now seen corresponding path program 26 times [2020-10-28 09:05:01,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:01,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971498478] [2020-10-28 09:05:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:01,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:01,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:01,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:01,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:06,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:06,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 09:05:06,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:06,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 09:05:06,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:06,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:05:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-28 09:05:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:05:06,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:06,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:06,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:06,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:06,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:06,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:06,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:05:06,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:06,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:06,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:06,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:06,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:06,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2020-10-28 09:05:06,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971498478] [2020-10-28 09:05:06,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:06,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:05:06,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852089408] [2020-10-28 09:05:06,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:05:06,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:06,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:05:06,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:05:06,856 INFO L87 Difference]: Start difference. First operand 186 states and 192 transitions. Second operand 30 states. [2020-10-28 09:05:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:07,460 INFO L93 Difference]: Finished difference Result 345 states and 362 transitions. [2020-10-28 09:05:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:05:07,461 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 181 [2020-10-28 09:05:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:07,462 INFO L225 Difference]: With dead ends: 345 [2020-10-28 09:05:07,462 INFO L226 Difference]: Without dead ends: 192 [2020-10-28 09:05:07,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:05:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-28 09:05:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-28 09:05:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 09:05:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 198 transitions. [2020-10-28 09:05:07,471 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 198 transitions. Word has length 181 [2020-10-28 09:05:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:07,472 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 198 transitions. [2020-10-28 09:05:07,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:05:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 198 transitions. [2020-10-28 09:05:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-28 09:05:07,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:07,473 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:07,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:05:07,473 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:07,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:07,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1480734895, now seen corresponding path program 27 times [2020-10-28 09:05:07,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:07,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369160600] [2020-10-28 09:05:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:07,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:07,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:07,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:07,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:12,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:12,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-28 09:05:12,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:12,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:05:12,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:12,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:12,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:05:12,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 09:05:12,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:05:12,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:13,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:13,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:13,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:13,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:13,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:13,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:05:13,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:13,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:13,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:13,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:13,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:13,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-28 09:05:13,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369160600] [2020-10-28 09:05:13,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:13,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:05:13,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815669857] [2020-10-28 09:05:13,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:05:13,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:13,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:05:13,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:05:13,201 INFO L87 Difference]: Start difference. First operand 192 states and 198 transitions. Second operand 31 states. [2020-10-28 09:05:13,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:13,784 INFO L93 Difference]: Finished difference Result 356 states and 373 transitions. [2020-10-28 09:05:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:05:13,784 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 187 [2020-10-28 09:05:13,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:13,786 INFO L225 Difference]: With dead ends: 356 [2020-10-28 09:05:13,786 INFO L226 Difference]: Without dead ends: 198 [2020-10-28 09:05:13,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:05:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-28 09:05:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-10-28 09:05:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-28 09:05:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 204 transitions. [2020-10-28 09:05:13,797 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 204 transitions. Word has length 187 [2020-10-28 09:05:13,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:13,798 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 204 transitions. [2020-10-28 09:05:13,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:05:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 204 transitions. [2020-10-28 09:05:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-28 09:05:13,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:13,800 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:13,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:05:13,800 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:13,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1566968690, now seen corresponding path program 28 times [2020-10-28 09:05:13,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:13,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934762640] [2020-10-28 09:05:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:13,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:14,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:14,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:18,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:18,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-28 09:05:18,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:18,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 09:05:18,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:18,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:05:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 09:05:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:05:18,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:19,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:19,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:19,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:19,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:19,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:19,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:19,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:19,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:19,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2020-10-28 09:05:19,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934762640] [2020-10-28 09:05:19,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:19,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:05:19,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014240257] [2020-10-28 09:05:19,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:05:19,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:19,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:05:19,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:05:19,626 INFO L87 Difference]: Start difference. First operand 198 states and 204 transitions. Second operand 32 states. [2020-10-28 09:05:20,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:20,322 INFO L93 Difference]: Finished difference Result 367 states and 384 transitions. [2020-10-28 09:05:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:05:20,322 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 193 [2020-10-28 09:05:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:20,323 INFO L225 Difference]: With dead ends: 367 [2020-10-28 09:05:20,324 INFO L226 Difference]: Without dead ends: 204 [2020-10-28 09:05:20,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:05:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-28 09:05:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-10-28 09:05:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-28 09:05:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 210 transitions. [2020-10-28 09:05:20,334 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 210 transitions. Word has length 193 [2020-10-28 09:05:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:20,334 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 210 transitions. [2020-10-28 09:05:20,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:05:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 210 transitions. [2020-10-28 09:05:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-28 09:05:20,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:20,336 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:20,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:05:20,336 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:20,337 INFO L82 PathProgramCache]: Analyzing trace with hash -387551473, now seen corresponding path program 29 times [2020-10-28 09:05:20,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:20,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788197161] [2020-10-28 09:05:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:20,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:20,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:21,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:25,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:25,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-28 09:05:25,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:25,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 09:05:25,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:25,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:25,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:05:25,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 09:05:25,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:05:25,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:26,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:26,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:26,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:26,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:26,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:26,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:26,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:26,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:26,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:26,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:26,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:26,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2020-10-28 09:05:26,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788197161] [2020-10-28 09:05:26,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:26,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:05:26,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293617356] [2020-10-28 09:05:26,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:05:26,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:26,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:05:26,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:05:26,238 INFO L87 Difference]: Start difference. First operand 204 states and 210 transitions. Second operand 33 states. [2020-10-28 09:05:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:26,862 INFO L93 Difference]: Finished difference Result 378 states and 395 transitions. [2020-10-28 09:05:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:05:26,862 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 199 [2020-10-28 09:05:26,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:26,864 INFO L225 Difference]: With dead ends: 378 [2020-10-28 09:05:26,864 INFO L226 Difference]: Without dead ends: 210 [2020-10-28 09:05:26,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:05:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-28 09:05:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2020-10-28 09:05:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-28 09:05:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 216 transitions. [2020-10-28 09:05:26,874 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 216 transitions. Word has length 199 [2020-10-28 09:05:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:26,874 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 216 transitions. [2020-10-28 09:05:26,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:05:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 216 transitions. [2020-10-28 09:05:26,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-28 09:05:26,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:26,876 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:26,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:05:26,877 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:26,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:26,878 INFO L82 PathProgramCache]: Analyzing trace with hash -945894510, now seen corresponding path program 30 times [2020-10-28 09:05:26,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:26,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983406756] [2020-10-28 09:05:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:27,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:27,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:27,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:27,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:31,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:31,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-28 09:05:31,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:31,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:05:31,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:31,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:05:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:05:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:05:31,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:05:32,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:32,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:32,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:32,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:32,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:32,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:05:32,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:32,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:32,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:32,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:32,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:32,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2325 trivial. 0 not checked. [2020-10-28 09:05:32,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983406756] [2020-10-28 09:05:32,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:32,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:05:32,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429591954] [2020-10-28 09:05:32,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:05:32,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:32,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:05:32,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:05:32,721 INFO L87 Difference]: Start difference. First operand 210 states and 216 transitions. Second operand 34 states. [2020-10-28 09:05:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:33,438 INFO L93 Difference]: Finished difference Result 389 states and 406 transitions. [2020-10-28 09:05:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:05:33,439 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 205 [2020-10-28 09:05:33,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:33,441 INFO L225 Difference]: With dead ends: 389 [2020-10-28 09:05:33,441 INFO L226 Difference]: Without dead ends: 216 [2020-10-28 09:05:33,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:05:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-28 09:05:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-28 09:05:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-28 09:05:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 222 transitions. [2020-10-28 09:05:33,452 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 222 transitions. Word has length 205 [2020-10-28 09:05:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:33,452 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 222 transitions. [2020-10-28 09:05:33,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:05:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 222 transitions. [2020-10-28 09:05:33,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-28 09:05:33,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:33,454 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:33,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:05:33,454 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:33,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2043719023, now seen corresponding path program 31 times [2020-10-28 09:05:33,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:33,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552329621] [2020-10-28 09:05:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:33,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:33,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:33,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:34,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:38,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:38,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-28 09:05:38,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:38,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:05:38,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:38,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:38,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:05:38,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-28 09:05:38,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:05:38,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:39,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:39,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:39,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:39,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:39,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:39,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:39,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:39,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:39,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2976 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2020-10-28 09:05:39,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552329621] [2020-10-28 09:05:39,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:39,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:05:39,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283698122] [2020-10-28 09:05:39,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:05:39,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:39,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:05:39,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:05:39,431 INFO L87 Difference]: Start difference. First operand 216 states and 222 transitions. Second operand 35 states. [2020-10-28 09:05:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:40,131 INFO L93 Difference]: Finished difference Result 400 states and 417 transitions. [2020-10-28 09:05:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:05:40,132 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 211 [2020-10-28 09:05:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:40,134 INFO L225 Difference]: With dead ends: 400 [2020-10-28 09:05:40,134 INFO L226 Difference]: Without dead ends: 222 [2020-10-28 09:05:40,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:05:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-28 09:05:40,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2020-10-28 09:05:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 09:05:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 228 transitions. [2020-10-28 09:05:40,144 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 228 transitions. Word has length 211 [2020-10-28 09:05:40,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:40,145 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 228 transitions. [2020-10-28 09:05:40,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:05:40,145 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 228 transitions. [2020-10-28 09:05:40,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-28 09:05:40,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:40,146 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:40,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:05:40,147 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:40,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:40,147 INFO L82 PathProgramCache]: Analyzing trace with hash 463193010, now seen corresponding path program 32 times [2020-10-28 09:05:40,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:40,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056957101] [2020-10-28 09:05:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:40,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:40,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:40,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:40,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:45,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:45,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-28 09:05:45,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:45,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-28 09:05:45,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:45,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:45,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:05:45,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-28 09:05:45,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:05:45,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:46,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:46,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:46,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:46,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:46,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:46,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:46,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:46,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:46,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:46,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:46,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:46,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3168 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2020-10-28 09:05:46,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056957101] [2020-10-28 09:05:46,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:46,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:05:46,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783972781] [2020-10-28 09:05:46,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:05:46,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:46,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:05:46,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:05:46,221 INFO L87 Difference]: Start difference. First operand 222 states and 228 transitions. Second operand 36 states. [2020-10-28 09:05:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:46,983 INFO L93 Difference]: Finished difference Result 411 states and 428 transitions. [2020-10-28 09:05:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:05:46,983 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 217 [2020-10-28 09:05:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:46,985 INFO L225 Difference]: With dead ends: 411 [2020-10-28 09:05:46,985 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 09:05:46,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:05:46,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 09:05:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-28 09:05:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-28 09:05:46,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 234 transitions. [2020-10-28 09:05:46,996 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 234 transitions. Word has length 217 [2020-10-28 09:05:46,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:46,997 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 234 transitions. [2020-10-28 09:05:46,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:05:46,997 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 234 transitions. [2020-10-28 09:05:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-28 09:05:46,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:46,998 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:46,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:05:46,999 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:46,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:46,999 INFO L82 PathProgramCache]: Analyzing trace with hash -94178353, now seen corresponding path program 33 times [2020-10-28 09:05:46,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:47,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197077780] [2020-10-28 09:05:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:47,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:47,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:47,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:47,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:52,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:52,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 09:05:52,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:52,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 09:05:52,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:52,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:05:52,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-28 09:05:52,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:05:52,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:53,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:53,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:53,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:53,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:53,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:53,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:05:53,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:53,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:53,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2020-10-28 09:05:53,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197077780] [2020-10-28 09:05:53,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:53,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:05:53,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682278041] [2020-10-28 09:05:53,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:05:53,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:53,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:05:53,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:05:53,089 INFO L87 Difference]: Start difference. First operand 228 states and 234 transitions. Second operand 37 states. [2020-10-28 09:05:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:53,879 INFO L93 Difference]: Finished difference Result 422 states and 439 transitions. [2020-10-28 09:05:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:05:53,880 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 223 [2020-10-28 09:05:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:53,882 INFO L225 Difference]: With dead ends: 422 [2020-10-28 09:05:53,882 INFO L226 Difference]: Without dead ends: 234 [2020-10-28 09:05:53,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:05:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-28 09:05:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-10-28 09:05:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 09:05:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 240 transitions. [2020-10-28 09:05:53,892 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 240 transitions. Word has length 223 [2020-10-28 09:05:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:53,892 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 240 transitions. [2020-10-28 09:05:53,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:05:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 240 transitions. [2020-10-28 09:05:53,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-28 09:05:53,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:53,894 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:53,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:05:53,894 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:53,895 INFO L82 PathProgramCache]: Analyzing trace with hash -392498222, now seen corresponding path program 34 times [2020-10-28 09:05:53,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:53,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464293031] [2020-10-28 09:05:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:54,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:54,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:54,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:54,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:58,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:58,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-28 09:05:58,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:58,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 09:05:58,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:58,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:58,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:05:58,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:05:58,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:05:58,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:00,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:00,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:00,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:00,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:00,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:00,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:06:00,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:00,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:00,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:00,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:00,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:00,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2975 trivial. 0 not checked. [2020-10-28 09:06:00,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464293031] [2020-10-28 09:06:00,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:00,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:06:00,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471484110] [2020-10-28 09:06:00,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:06:00,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:00,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:06:00,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:06:00,048 INFO L87 Difference]: Start difference. First operand 234 states and 240 transitions. Second operand 38 states. [2020-10-28 09:06:00,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:00,733 INFO L93 Difference]: Finished difference Result 433 states and 450 transitions. [2020-10-28 09:06:00,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:06:00,734 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 229 [2020-10-28 09:06:00,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:00,736 INFO L225 Difference]: With dead ends: 433 [2020-10-28 09:06:00,736 INFO L226 Difference]: Without dead ends: 240 [2020-10-28 09:06:00,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:06:00,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-28 09:06:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-10-28 09:06:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-28 09:06:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 246 transitions. [2020-10-28 09:06:00,746 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 246 transitions. Word has length 229 [2020-10-28 09:06:00,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:00,747 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 246 transitions. [2020-10-28 09:06:00,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:06:00,747 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 246 transitions. [2020-10-28 09:06:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-28 09:06:00,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:00,748 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:00,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:06:00,749 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:00,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:00,749 INFO L82 PathProgramCache]: Analyzing trace with hash -931184081, now seen corresponding path program 35 times [2020-10-28 09:06:00,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:00,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080678603] [2020-10-28 09:06:00,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:00,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:01,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:01,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:01,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:05,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:05,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-28 09:06:05,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:06:05,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:06:05,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:05,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:05,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:06:05,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 09:06:05,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:06:05,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:06,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:06,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:06,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:06,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:06,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:06,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:06,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:06,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:06,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:06,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:06,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:06,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3150 trivial. 0 not checked. [2020-10-28 09:06:06,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080678603] [2020-10-28 09:06:06,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:06,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:06:06,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543267089] [2020-10-28 09:06:06,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:06:06,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:06,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:06:06,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:06:06,931 INFO L87 Difference]: Start difference. First operand 240 states and 246 transitions. Second operand 39 states. [2020-10-28 09:06:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:07,647 INFO L93 Difference]: Finished difference Result 444 states and 461 transitions. [2020-10-28 09:06:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:06:07,647 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 235 [2020-10-28 09:06:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:07,649 INFO L225 Difference]: With dead ends: 444 [2020-10-28 09:06:07,649 INFO L226 Difference]: Without dead ends: 246 [2020-10-28 09:06:07,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:06:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-28 09:06:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2020-10-28 09:06:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-28 09:06:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 252 transitions. [2020-10-28 09:06:07,659 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 252 transitions. Word has length 235 [2020-10-28 09:06:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:07,660 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 252 transitions. [2020-10-28 09:06:07,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:06:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 252 transitions. [2020-10-28 09:06:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-28 09:06:07,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:07,662 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:07,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:06:07,662 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:07,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:07,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1331321842, now seen corresponding path program 36 times [2020-10-28 09:06:07,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:07,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433362970] [2020-10-28 09:06:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:07,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:08,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:08,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:08,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:12,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:12,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-28 09:06:12,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:06:12,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 09:06:12,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:12,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:12,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:06:12,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-28 09:06:12,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:06:12,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:13,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:13,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:13,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:13,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:13,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:13,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:13,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:13,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:13,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:13,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:13,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:13,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3996 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3330 trivial. 0 not checked. [2020-10-28 09:06:13,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433362970] [2020-10-28 09:06:13,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:13,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:06:13,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852618612] [2020-10-28 09:06:13,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:06:13,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:13,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:06:13,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:06:13,953 INFO L87 Difference]: Start difference. First operand 246 states and 252 transitions. Second operand 40 states. [2020-10-28 09:06:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:14,839 INFO L93 Difference]: Finished difference Result 455 states and 472 transitions. [2020-10-28 09:06:14,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 09:06:14,839 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 241 [2020-10-28 09:06:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:14,841 INFO L225 Difference]: With dead ends: 455 [2020-10-28 09:06:14,841 INFO L226 Difference]: Without dead ends: 252 [2020-10-28 09:06:14,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:06:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-28 09:06:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2020-10-28 09:06:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-28 09:06:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 258 transitions. [2020-10-28 09:06:14,850 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 258 transitions. Word has length 241 [2020-10-28 09:06:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:14,851 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 258 transitions. [2020-10-28 09:06:14,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:06:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 258 transitions. [2020-10-28 09:06:14,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-28 09:06:14,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:14,853 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:14,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:06:14,853 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:14,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:14,853 INFO L82 PathProgramCache]: Analyzing trace with hash -796419953, now seen corresponding path program 37 times [2020-10-28 09:06:14,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:14,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797047451] [2020-10-28 09:06:14,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:14,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:15,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:15,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:15,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:19,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:19,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-28 09:06:19,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:06:19,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:06:19,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:19,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:19,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 09:06:19,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 09:06:19,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 09:06:19,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:21,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:21,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:21,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:21,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:21,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:21,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:21,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:21,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:21,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:21,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:21,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:21,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4218 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-10-28 09:06:21,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797047451] [2020-10-28 09:06:21,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:21,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:06:21,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788598852] [2020-10-28 09:06:21,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:06:21,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:21,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:06:21,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:06:21,192 INFO L87 Difference]: Start difference. First operand 252 states and 258 transitions. Second operand 41 states. [2020-10-28 09:06:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:22,080 INFO L93 Difference]: Finished difference Result 466 states and 483 transitions. [2020-10-28 09:06:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 09:06:22,081 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 247 [2020-10-28 09:06:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:22,083 INFO L225 Difference]: With dead ends: 466 [2020-10-28 09:06:22,083 INFO L226 Difference]: Without dead ends: 258 [2020-10-28 09:06:22,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:06:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-28 09:06:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2020-10-28 09:06:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-28 09:06:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 264 transitions. [2020-10-28 09:06:22,093 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 264 transitions. Word has length 247 [2020-10-28 09:06:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:22,093 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 264 transitions. [2020-10-28 09:06:22,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:06:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 264 transitions. [2020-10-28 09:06:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-28 09:06:22,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:22,095 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:22,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:06:22,095 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:22,096 INFO L82 PathProgramCache]: Analyzing trace with hash -501744622, now seen corresponding path program 38 times [2020-10-28 09:06:22,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:22,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075110045] [2020-10-28 09:06:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:22,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:22,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:22,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:22,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking...