/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-cav19/array_init_var_plus_ind3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:35:37,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:35:37,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:35:37,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:35:37,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:35:37,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:35:37,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:35:37,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:35:37,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:35:37,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:35:37,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:35:37,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:35:37,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:35:37,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:35:37,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:35:37,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:35:37,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:35:37,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:35:37,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:35:37,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:35:37,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:35:37,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:35:37,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:35:37,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:35:37,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:35:37,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:35:37,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:35:37,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:35:37,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:35:37,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:35:37,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:35:37,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:35:37,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:35:37,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:35:37,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:35:37,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:35:37,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:35:37,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:35:37,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:35:37,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:35:37,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:35:37,215 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 08:35:37,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:35:37,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:35:37,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:35:37,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:35:37,272 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:35:37,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:35:37,273 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:35:37,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:35:37,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:35:37,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:35:37,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:35:37,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:35:37,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:35:37,274 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:35:37,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:35:37,274 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:35:37,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:35:37,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:35:37,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:35:37,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:35:37,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:35:37,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:35:37,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:35:37,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:35:37,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:35:37,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:35:37,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:35:37,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:35:37,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:35:37,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:35:37,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:35:37,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:35:37,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:35:37,686 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:35:37,687 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:35:37,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind3.c [2020-10-28 08:35:37,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29f0b295d/6b96a9f102cc499081b69e9521b460fc/FLAGe27a6e935 [2020-10-28 08:35:38,469 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:35:38,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind3.c [2020-10-28 08:35:38,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29f0b295d/6b96a9f102cc499081b69e9521b460fc/FLAGe27a6e935 [2020-10-28 08:35:38,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29f0b295d/6b96a9f102cc499081b69e9521b460fc [2020-10-28 08:35:38,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:35:38,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:35:38,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:35:38,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:35:38,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:35:38,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:35:38" (1/1) ... [2020-10-28 08:35:38,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455299ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38, skipping insertion in model container [2020-10-28 08:35:38,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:35:38" (1/1) ... [2020-10-28 08:35:38,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:35:38,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:35:39,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:35:39,107 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:35:39,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:35:39,146 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:35:39,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:39 WrapperNode [2020-10-28 08:35:39,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:35:39,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:35:39,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:35:39,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:35:39,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:39" (1/1) ... [2020-10-28 08:35:39,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:39" (1/1) ... [2020-10-28 08:35:39,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:39" (1/1) ... [2020-10-28 08:35:39,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:39" (1/1) ... [2020-10-28 08:35:39,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:39" (1/1) ... [2020-10-28 08:35:39,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:39" (1/1) ... [2020-10-28 08:35:39,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:39" (1/1) ... [2020-10-28 08:35:39,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:35:39,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:35:39,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:35:39,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:35:39,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:39" (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 08:35:39,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:35:39,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:35:39,332 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:35:39,332 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 08:35:39,332 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:35:39,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:35:39,333 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:35:39,333 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:35:39,333 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:35:39,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:35:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 08:35:39,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:35:39,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:35:39,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:35:39,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:35:39,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:35:39,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:35:39,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:35:39,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:35:39,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:35:39,889 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:35:39,889 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 08:35:39,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:35:39 BoogieIcfgContainer [2020-10-28 08:35:39,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:35:39,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:35:39,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:35:39,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:35:39,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:35:38" (1/3) ... [2020-10-28 08:35:39,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612cca3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:35:39, skipping insertion in model container [2020-10-28 08:35:39,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:39" (2/3) ... [2020-10-28 08:35:39,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612cca3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:35:39, skipping insertion in model container [2020-10-28 08:35:39,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:35:39" (3/3) ... [2020-10-28 08:35:39,908 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2020-10-28 08:35:39,922 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:35:39,928 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:35:39,946 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:35:39,990 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:35:39,990 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:35:39,990 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:35:39,990 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:35:39,991 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:35:39,991 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:35:39,991 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:35:39,991 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:35:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 08:35:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 08:35:40,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:40,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:40,027 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:40,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1582220556, now seen corresponding path program 1 times [2020-10-28 08:35:40,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:40,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930935777] [2020-10-28 08:35:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:40,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:40,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:40,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:40,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 08:35:40,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:35:40,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-28 08:35:40,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:40,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:40,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:35:40,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:40,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:35:40,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:35:41,036 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-28 08:35:41,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:41,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:41,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:41,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:41,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:41,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 08:35:41,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:41,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:41,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:41,082 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 08:35:41,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930935777] [2020-10-28 08:35:41,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:35:41,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:35:41,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048330257] [2020-10-28 08:35:41,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:35:41,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:41,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:35:41,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:35:41,111 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-10-28 08:35:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:41,355 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2020-10-28 08:35:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:35:41,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-28 08:35:41,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:41,367 INFO L225 Difference]: With dead ends: 57 [2020-10-28 08:35:41,367 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 08:35:41,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:35:41,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 08:35:41,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2020-10-28 08:35:41,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 08:35:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-28 08:35:41,422 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2020-10-28 08:35:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:41,423 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-28 08:35:41,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:35:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-28 08:35:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 08:35:41,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:41,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:41,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:35:41,425 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:41,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2112687446, now seen corresponding path program 1 times [2020-10-28 08:35:41,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:41,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71120532] [2020-10-28 08:35:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:41,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:41,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 08:35:41,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:41,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 08:35:41,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:41,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:41,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:35:41,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:35:41,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 08:35:41,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:41,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:41,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:41,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:41,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:41,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:41,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 08:35:41,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:41,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:35:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:35:41,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:41,613 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 08:35:41,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71120532] [2020-10-28 08:35:41,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:35:41,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:35:41,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686606750] [2020-10-28 08:35:41,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:35:41,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:41,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:35:41,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:35:41,618 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-28 08:35:41,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:41,721 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-10-28 08:35:41,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:35:41,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 08:35:41,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:41,724 INFO L225 Difference]: With dead ends: 37 [2020-10-28 08:35:41,724 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 08:35:41,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:35:41,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 08:35:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-28 08:35:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 08:35:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-28 08:35:41,733 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-10-28 08:35:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:41,734 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-28 08:35:41,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:35:41,734 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-28 08:35:41,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 08:35:41,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:41,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:41,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:35:41,736 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash 996586641, now seen corresponding path program 1 times [2020-10-28 08:35:41,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:41,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942979181] [2020-10-28 08:35:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:41,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:41,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:42,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:42,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 08:35:42,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:35:42,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-28 08:35:42,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:42,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:35:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 08:35:42,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:42,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:42,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:42,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:42,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:42,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:42,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 08:35:42,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:42,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:42,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:42,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:42,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:42,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:42,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942979181] [2020-10-28 08:35:42,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:42,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:35:42,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326155415] [2020-10-28 08:35:42,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:35:42,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:35:42,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:35:42,149 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-28 08:35:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:42,354 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-28 08:35:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:35:42,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-28 08:35:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:42,358 INFO L225 Difference]: With dead ends: 44 [2020-10-28 08:35:42,358 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 08:35:42,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:35:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 08:35:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-10-28 08:35:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 08:35:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-28 08:35:42,369 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-28 08:35:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:42,370 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-28 08:35:42,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:35:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-28 08:35:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 08:35:42,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:42,371 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:42,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:35:42,371 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1207497669, now seen corresponding path program 1 times [2020-10-28 08:35:42,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:42,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863754712] [2020-10-28 08:35:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:42,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:42,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:42,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 08:35:42,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:42,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-28 08:35:42,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:42,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:42,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:35:42,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:35:42,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:35:42,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:42,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:42,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:42,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:42,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:42,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 08:35:42,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:42,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:42,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:35:42,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:42,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:35:42,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:42,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863754712] [2020-10-28 08:35:42,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:42,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:35:42,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415298633] [2020-10-28 08:35:42,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:35:42,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:42,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:35:42,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:35:42,687 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-28 08:35:42,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:42,806 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-28 08:35:42,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:35:42,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 08:35:42,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:42,807 INFO L225 Difference]: With dead ends: 40 [2020-10-28 08:35:42,807 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 08:35:42,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:35:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 08:35:42,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-28 08:35:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 08:35:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-28 08:35:42,825 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-10-28 08:35:42,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:42,825 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-28 08:35:42,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:35:42,825 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-28 08:35:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 08:35:42,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:42,829 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:42,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:35:42,830 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:42,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:42,831 INFO L82 PathProgramCache]: Analyzing trace with hash 533781228, now seen corresponding path program 2 times [2020-10-28 08:35:42,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:42,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624233209] [2020-10-28 08:35:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:42,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:42,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:43,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:43,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 08:35:43,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:35:43,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-28 08:35:43,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:43,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:43,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:35:43,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:43,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:35:43,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:43,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:43,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:43,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:43,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:43,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:43,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 08:35:43,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:43,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:43,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:43,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:43,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:43,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:43,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624233209] [2020-10-28 08:35:43,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:43,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:35:43,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183451511] [2020-10-28 08:35:43,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:35:43,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:43,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:35:43,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:35:43,390 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-28 08:35:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:43,620 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-28 08:35:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:35:43,623 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-28 08:35:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:43,624 INFO L225 Difference]: With dead ends: 47 [2020-10-28 08:35:43,624 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 08:35:43,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:35:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 08:35:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-10-28 08:35:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 08:35:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-28 08:35:43,640 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-10-28 08:35:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:43,641 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-28 08:35:43,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:35:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-28 08:35:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:35:43,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:43,644 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:43,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:35:43,644 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash -254568246, now seen corresponding path program 2 times [2020-10-28 08:35:43,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:43,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634135672] [2020-10-28 08:35:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:43,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:43,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:43,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:35:43,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:43,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 08:35:43,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:43,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:43,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:35:43,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:35:43,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 08:35:43,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:43,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:43,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:43,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:43,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:43,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:43,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:35:43,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:43,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:35:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:43,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:35:43,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:43,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634135672] [2020-10-28 08:35:43,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:43,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:35:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674626069] [2020-10-28 08:35:43,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:35:43,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:43,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:35:43,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:35:43,892 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-10-28 08:35:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:44,006 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-28 08:35:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:35:44,006 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 08:35:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:44,007 INFO L225 Difference]: With dead ends: 43 [2020-10-28 08:35:44,007 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 08:35:44,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:35:44,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 08:35:44,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-28 08:35:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 08:35:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-28 08:35:44,014 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-10-28 08:35:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:44,015 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-28 08:35:44,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:35:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-28 08:35:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 08:35:44,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:44,016 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:44,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:35:44,016 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:44,017 INFO L82 PathProgramCache]: Analyzing trace with hash -57257295, now seen corresponding path program 3 times [2020-10-28 08:35:44,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:44,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328148880] [2020-10-28 08:35:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:44,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:44,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:44,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:44,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 08:35:44,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:35:44,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-28 08:35:44,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:44,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:44,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:35:44,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:44,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 08:35:44,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:44,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:44,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:44,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:44,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:44,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:44,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 08:35:44,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:44,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:44,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:44,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:44,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:44,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:44,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328148880] [2020-10-28 08:35:44,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:44,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:35:44,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031406141] [2020-10-28 08:35:44,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:35:44,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:44,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:35:44,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:35:44,480 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2020-10-28 08:35:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:44,718 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-28 08:35:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:35:44,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 08:35:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:44,720 INFO L225 Difference]: With dead ends: 50 [2020-10-28 08:35:44,720 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 08:35:44,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:35:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 08:35:44,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-10-28 08:35:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 08:35:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-28 08:35:44,728 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2020-10-28 08:35:44,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:44,728 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-28 08:35:44,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:35:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-28 08:35:44,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 08:35:44,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:44,729 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:44,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:35:44,730 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1396893275, now seen corresponding path program 3 times [2020-10-28 08:35:44,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:44,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705638342] [2020-10-28 08:35:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:44,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:44,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:44,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 08:35:44,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:44,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-28 08:35:44,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:44,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:44,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:35:44,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:35:44,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:35:44,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:44,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:44,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:44,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:44,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:44,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:44,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:35:44,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:44,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:44,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:35:44,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:44,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:35:44,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:44,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705638342] [2020-10-28 08:35:44,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:44,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:35:44,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815064600] [2020-10-28 08:35:44,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:35:44,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:35:44,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:35:44,965 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2020-10-28 08:35:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:45,095 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-28 08:35:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:35:45,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 08:35:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:45,097 INFO L225 Difference]: With dead ends: 46 [2020-10-28 08:35:45,097 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 08:35:45,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:35:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 08:35:45,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 08:35:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 08:35:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-28 08:35:45,104 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2020-10-28 08:35:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:45,104 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-28 08:35:45,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:35:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-28 08:35:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 08:35:45,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:45,105 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:45,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:35:45,106 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1680017612, now seen corresponding path program 4 times [2020-10-28 08:35:45,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:45,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627920937] [2020-10-28 08:35:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:45,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:45,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:45,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:45,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 08:35:45,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:35:45,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-28 08:35:45,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:45,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:35:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:35:45,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:45,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:45,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:45,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:45,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:45,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:45,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 08:35:45,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:45,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:45,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:45,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:45,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:45,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:45,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627920937] [2020-10-28 08:35:45,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:45,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:35:45,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509665982] [2020-10-28 08:35:45,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:35:45,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:45,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:35:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:35:45,752 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-10-28 08:35:46,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:46,050 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-28 08:35:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:35:46,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-28 08:35:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:46,052 INFO L225 Difference]: With dead ends: 53 [2020-10-28 08:35:46,052 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 08:35:46,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:35:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 08:35:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-10-28 08:35:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 08:35:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-28 08:35:46,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-10-28 08:35:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:46,070 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-28 08:35:46,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:35:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-28 08:35:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 08:35:46,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:46,073 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:46,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:35:46,073 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash 919021290, now seen corresponding path program 4 times [2020-10-28 08:35:46,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:46,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601193578] [2020-10-28 08:35:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:46,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:46,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:46,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 08:35:46,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:46,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-28 08:35:46,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:46,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:46,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:35:46,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:35:46,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 08:35:46,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:46,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:46,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:46,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:46,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:46,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:46,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:35:46,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:46,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:46,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:35:46,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:46,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:35:46,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:46,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601193578] [2020-10-28 08:35:46,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:46,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:35:46,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013375980] [2020-10-28 08:35:46,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:35:46,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:46,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:35:46,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:35:46,406 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 9 states. [2020-10-28 08:35:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:46,524 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-10-28 08:35:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:35:46,525 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-28 08:35:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:46,526 INFO L225 Difference]: With dead ends: 49 [2020-10-28 08:35:46,526 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 08:35:46,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:35:46,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 08:35:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-28 08:35:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 08:35:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-28 08:35:46,532 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2020-10-28 08:35:46,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:46,533 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-28 08:35:46,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:35:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-28 08:35:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:35:46,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:46,534 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:46,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:35:46,534 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:46,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:46,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1814112047, now seen corresponding path program 5 times [2020-10-28 08:35:46,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:46,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984389113] [2020-10-28 08:35:46,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:46,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:47,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:47,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:35:47,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:35:47,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1038 [2020-10-28 08:35:47,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:47,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:47,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:35:47,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:47,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 08:35:47,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:47,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:47,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:47,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:47,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:47,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:47,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 08:35:47,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:47,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:47,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:47,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:47,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:47,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:47,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984389113] [2020-10-28 08:35:47,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:47,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:35:47,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805808020] [2020-10-28 08:35:47,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:35:47,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:47,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:35:47,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:35:47,744 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 10 states. [2020-10-28 08:35:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:48,053 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-28 08:35:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:35:48,054 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 08:35:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:48,055 INFO L225 Difference]: With dead ends: 56 [2020-10-28 08:35:48,055 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 08:35:48,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:35:48,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 08:35:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2020-10-28 08:35:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 08:35:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-28 08:35:48,062 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 29 [2020-10-28 08:35:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:48,062 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-28 08:35:48,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:35:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-28 08:35:48,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 08:35:48,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:48,063 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:48,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:35:48,063 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:48,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:48,064 INFO L82 PathProgramCache]: Analyzing trace with hash -24815739, now seen corresponding path program 5 times [2020-10-28 08:35:48,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:48,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98712285] [2020-10-28 08:35:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:48,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:48,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:48,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 08:35:48,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:48,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-28 08:35:48,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:48,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:48,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:35:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:35:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 08:35:48,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:35:48,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:48,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:48,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:48,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:48,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:48,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:35:48,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:48,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:48,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:35:48,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:48,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:35:48,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:48,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98712285] [2020-10-28 08:35:48,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:48,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:35:48,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544293558] [2020-10-28 08:35:48,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:35:48,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:48,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:35:48,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:35:48,794 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 16 states. [2020-10-28 08:35:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:49,282 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-10-28 08:35:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:35:49,282 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-28 08:35:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:49,283 INFO L225 Difference]: With dead ends: 54 [2020-10-28 08:35:49,283 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 08:35:49,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:35:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 08:35:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-10-28 08:35:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 08:35:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-28 08:35:49,292 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 30 [2020-10-28 08:35:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:49,293 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-28 08:35:49,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:35:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-28 08:35:49,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 08:35:49,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:49,294 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:49,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:35:49,294 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:49,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:49,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1691569836, now seen corresponding path program 6 times [2020-10-28 08:35:49,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:49,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652323821] [2020-10-28 08:35:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:49,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:49,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:50,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:50,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 08:35:50,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:35:50,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1327 [2020-10-28 08:35:50,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:50,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:50,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:35:50,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:50,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:35:50,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:50,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:50,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:50,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:50,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:50,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:50,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 08:35:50,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:50,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:50,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:50,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:50,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652323821] [2020-10-28 08:35:50,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:50,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:35:50,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943170857] [2020-10-28 08:35:50,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:35:50,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:50,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:35:50,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:35:50,818 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 11 states. [2020-10-28 08:35:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:51,210 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-28 08:35:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:35:51,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-28 08:35:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:51,213 INFO L225 Difference]: With dead ends: 70 [2020-10-28 08:35:51,213 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 08:35:51,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:35:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 08:35:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-28 08:35:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 08:35:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-28 08:35:51,222 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 32 [2020-10-28 08:35:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:51,222 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-28 08:35:51,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:35:51,222 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-28 08:35:51,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:35:51,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:51,223 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:51,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:35:51,224 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:51,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:51,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1277140234, now seen corresponding path program 6 times [2020-10-28 08:35:51,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:51,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364438580] [2020-10-28 08:35:51,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:51,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:51,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:51,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:35:51,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:51,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-28 08:35:51,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:51,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:51,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:35:51,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:35:51,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:35:51,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:52,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:52,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:52,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:52,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:52,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:52,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:35:52,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:52,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:52,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:35:52,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:52,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:35:52,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:52,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364438580] [2020-10-28 08:35:52,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:52,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:35:52,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078216332] [2020-10-28 08:35:52,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:35:52,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:52,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:35:52,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:35:52,065 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 17 states. [2020-10-28 08:35:52,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:52,674 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-28 08:35:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:35:52,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-28 08:35:52,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:52,676 INFO L225 Difference]: With dead ends: 70 [2020-10-28 08:35:52,676 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 08:35:52,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:35:52,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 08:35:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-10-28 08:35:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:35:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-28 08:35:52,686 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 33 [2020-10-28 08:35:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:52,687 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-28 08:35:52,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:35:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-28 08:35:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 08:35:52,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:52,688 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:52,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:35:52,689 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:52,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:52,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1259190543, now seen corresponding path program 7 times [2020-10-28 08:35:52,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:52,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190967060] [2020-10-28 08:35:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:52,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:52,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:53,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:53,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:55,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:55,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 08:35:55,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:35:55,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2368 [2020-10-28 08:35:55,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:55,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:55,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:35:55,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:55,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 08:35:55,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:55,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:55,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:55,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:55,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:55,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:55,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 08:35:55,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:55,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:55,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:55,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:55,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:55,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:55,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190967060] [2020-10-28 08:35:55,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:55,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:35:55,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348520555] [2020-10-28 08:35:55,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:35:55,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:55,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:35:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:35:55,247 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 12 states. [2020-10-28 08:35:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:55,626 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-10-28 08:35:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:35:55,627 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 08:35:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:55,628 INFO L225 Difference]: With dead ends: 80 [2020-10-28 08:35:55,628 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 08:35:55,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:35:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 08:35:55,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-10-28 08:35:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 08:35:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-28 08:35:55,647 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 35 [2020-10-28 08:35:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:55,647 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-28 08:35:55,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:35:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-28 08:35:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 08:35:55,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:55,651 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:55,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:35:55,651 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2118299, now seen corresponding path program 7 times [2020-10-28 08:35:55,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:55,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217158774] [2020-10-28 08:35:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:55,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:55,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:56,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:56,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 08:35:56,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:35:56,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 855 [2020-10-28 08:35:56,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:56,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:56,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:35:56,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:35:56,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 08:35:56,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:57,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:57,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:57,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:57,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:57,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:57,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:35:57,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:57,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:57,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:35:57,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:57,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:35:57,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:57,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217158774] [2020-10-28 08:35:57,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:57,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:35:57,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780937359] [2020-10-28 08:35:57,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:35:57,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:57,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:35:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:35:57,230 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-10-28 08:35:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:58,079 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-10-28 08:35:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:35:58,080 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-10-28 08:35:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:58,081 INFO L225 Difference]: With dead ends: 82 [2020-10-28 08:35:58,081 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 08:35:58,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:35:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 08:35:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2020-10-28 08:35:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 08:35:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-28 08:35:58,091 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 36 [2020-10-28 08:35:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:58,091 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-28 08:35:58,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:35:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-28 08:35:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 08:35:58,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:58,092 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:58,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:35:58,092 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:58,093 INFO L82 PathProgramCache]: Analyzing trace with hash 871787, now seen corresponding path program 1 times [2020-10-28 08:35:58,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:58,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478185498] [2020-10-28 08:35:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:58,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:58,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:58,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 08:35:58,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:58,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-28 08:35:58,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:58,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:58,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:35:58,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:35:58,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:35:58,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:58,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:58,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:58,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:58,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:58,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:58,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:35:58,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:58,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:58,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:35:58,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:58,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:35:58,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:58,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 08:35:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:58,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:58,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:58,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:35:58,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:58,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 08:35:58,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:58,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:58,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:58,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:58,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:35:58,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:58,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478185498] [2020-10-28 08:35:58,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:58,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:35:58,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876669447] [2020-10-28 08:35:58,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:35:58,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:58,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:35:58,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:35:58,436 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 11 states. [2020-10-28 08:35:58,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:58,619 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-28 08:35:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:35:58,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-28 08:35:58,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:58,620 INFO L225 Difference]: With dead ends: 68 [2020-10-28 08:35:58,621 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 08:35:58,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:35:58,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 08:35:58,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 08:35:58,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 08:35:58,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-28 08:35:58,629 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 38 [2020-10-28 08:35:58,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:58,629 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-28 08:35:58,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:35:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-28 08:35:58,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 08:35:58,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:58,630 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:58,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:35:58,630 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:58,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2028973196, now seen corresponding path program 8 times [2020-10-28 08:35:58,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:58,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794607802] [2020-10-28 08:35:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:58,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:58,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:59,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:59,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:59,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:00,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:00,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:00,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:01,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:01,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 08:36:01,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:36:01,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3069 [2020-10-28 08:36:01,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:01,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:01,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:36:01,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:01,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:36:01,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:01,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:01,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:01,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:01,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:01,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:01,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 08:36:01,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:01,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:01,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:01,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:01,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:01,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:36:01,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794607802] [2020-10-28 08:36:01,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:01,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:36:01,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080782406] [2020-10-28 08:36:01,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:36:01,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:01,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:36:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:36:01,901 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2020-10-28 08:36:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:02,229 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-10-28 08:36:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:36:02,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 08:36:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:02,232 INFO L225 Difference]: With dead ends: 83 [2020-10-28 08:36:02,232 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 08:36:02,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:36:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 08:36:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-10-28 08:36:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 08:36:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-28 08:36:02,241 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 38 [2020-10-28 08:36:02,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:02,242 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-28 08:36:02,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:36:02,242 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-28 08:36:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 08:36:02,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:02,243 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:02,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:36:02,243 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:02,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1148257494, now seen corresponding path program 8 times [2020-10-28 08:36:02,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:02,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516277903] [2020-10-28 08:36:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:02,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:02,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:02,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:03,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:03,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 08:36:03,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:03,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1457 [2020-10-28 08:36:03,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:03,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:03,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:36:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:36:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:36:03,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:04,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:04,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:04,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:04,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:04,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:04,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:36:04,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:04,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:04,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:04,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:04,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:04,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:36:04,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516277903] [2020-10-28 08:36:04,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:04,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:36:04,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908533336] [2020-10-28 08:36:04,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:36:04,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:04,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:36:04,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:36:04,407 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 22 states. [2020-10-28 08:36:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:05,439 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2020-10-28 08:36:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:36:05,440 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-10-28 08:36:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:05,441 INFO L225 Difference]: With dead ends: 85 [2020-10-28 08:36:05,441 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 08:36:05,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:36:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 08:36:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2020-10-28 08:36:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 08:36:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-28 08:36:05,456 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2020-10-28 08:36:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:05,456 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-28 08:36:05,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:36:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-28 08:36:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:36:05,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:05,457 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:05,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:36:05,457 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:05,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1927266832, now seen corresponding path program 2 times [2020-10-28 08:36:05,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:05,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158083513] [2020-10-28 08:36:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:05,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:05,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:07,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:07,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:36:07,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:36:07,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1919 [2020-10-28 08:36:07,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:07,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:07,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:36:07,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:36:07,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:36:07,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:07,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:07,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:07,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:07,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:07,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:07,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:36:07,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:07,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:07,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:07,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:07,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:07,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:07,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 08:36:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:07,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:07,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:07,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:07,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:07,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 08:36:07,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:07,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:07,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:36:07,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:07,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:36:07,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:36:07,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158083513] [2020-10-28 08:36:07,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:07,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:36:07,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777899709] [2020-10-28 08:36:07,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:36:07,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:07,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:36:07,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:36:07,920 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 19 states. [2020-10-28 08:36:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:08,884 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-28 08:36:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:36:08,884 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-10-28 08:36:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:08,886 INFO L225 Difference]: With dead ends: 72 [2020-10-28 08:36:08,886 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 08:36:08,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:36:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 08:36:08,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-10-28 08:36:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 08:36:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-28 08:36:08,897 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 41 [2020-10-28 08:36:08,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:08,897 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-28 08:36:08,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:36:08,897 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-28 08:36:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:36:08,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:08,899 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:08,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:36:08,899 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:08,900 INFO L82 PathProgramCache]: Analyzing trace with hash 100834577, now seen corresponding path program 9 times [2020-10-28 08:36:08,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:08,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054753349] [2020-10-28 08:36:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:08,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:09,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:09,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:09,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:09,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:09,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:10,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:10,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:11,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:12,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:12,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:13,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:13,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:13,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:13,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:13,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:36:13,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 08:36:13,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4899 [2020-10-28 08:36:13,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:13,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:36:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 08:36:13,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:13,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:13,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:14,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:14,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:14,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:14,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:36:14,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:14,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:14,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:14,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:14,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:14,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:36:14,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054753349] [2020-10-28 08:36:14,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:14,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:36:14,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268290832] [2020-10-28 08:36:14,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:36:14,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:14,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:36:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:36:14,032 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 14 states. [2020-10-28 08:36:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:14,513 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2020-10-28 08:36:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:36:14,514 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-28 08:36:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:14,515 INFO L225 Difference]: With dead ends: 99 [2020-10-28 08:36:14,515 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 08:36:14,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:36:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 08:36:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2020-10-28 08:36:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 08:36:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-28 08:36:14,530 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 41 [2020-10-28 08:36:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:14,531 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-28 08:36:14,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:36:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-28 08:36:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 08:36:14,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:14,532 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:14,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:36:14,532 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:14,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash -791012539, now seen corresponding path program 9 times [2020-10-28 08:36:14,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:14,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243900359] [2020-10-28 08:36:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:14,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:14,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:14,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:15,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:15,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:15,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 08:36:15,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:36:15,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1404 [2020-10-28 08:36:15,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:15,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:15,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:36:15,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:36:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 08:36:15,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:16,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:16,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:16,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:16,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:16,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:16,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:36:16,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:16,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:16,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:16,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:16,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:16,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:36:16,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243900359] [2020-10-28 08:36:16,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:16,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:36:16,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769082423] [2020-10-28 08:36:16,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:36:16,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:16,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:36:16,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:36:16,722 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 23 states. [2020-10-28 08:36:17,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:17,862 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-28 08:36:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:36:17,863 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-28 08:36:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:17,864 INFO L225 Difference]: With dead ends: 80 [2020-10-28 08:36:17,865 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 08:36:17,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:36:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 08:36:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-10-28 08:36:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 08:36:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-10-28 08:36:17,885 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 42 [2020-10-28 08:36:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:17,885 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-10-28 08:36:17,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:36:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-10-28 08:36:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 08:36:17,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:17,886 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:17,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:36:17,887 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:17,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2082718539, now seen corresponding path program 3 times [2020-10-28 08:36:17,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:17,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420815881] [2020-10-28 08:36:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:17,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:18,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:18,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:21,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:21,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 08:36:21,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:21,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3594 [2020-10-28 08:36:21,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:21,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:21,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:36:21,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:36:21,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 08:36:21,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:22,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:22,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:22,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:22,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:22,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:22,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:36:22,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:22,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:22,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:22,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 08:36:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:22,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:22,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:22,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:22,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:22,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:36:22,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:22,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:22,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:36:22,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:22,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:36:22,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:36:22,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420815881] [2020-10-28 08:36:22,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:22,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:36:22,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789533071] [2020-10-28 08:36:22,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:36:22,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:22,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:36:22,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:36:22,241 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 21 states. [2020-10-28 08:36:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:23,852 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-10-28 08:36:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:36:23,853 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2020-10-28 08:36:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:23,855 INFO L225 Difference]: With dead ends: 95 [2020-10-28 08:36:23,855 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 08:36:23,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 08:36:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 08:36:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2020-10-28 08:36:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 08:36:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-10-28 08:36:23,870 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 44 [2020-10-28 08:36:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:23,870 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-10-28 08:36:23,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:36:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-10-28 08:36:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:36:23,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:23,871 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:23,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:36:23,871 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash -958432240, now seen corresponding path program 4 times [2020-10-28 08:36:23,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:23,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064446871] [2020-10-28 08:36:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:23,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:24,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:24,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:24,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:24,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:28,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:28,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:36:28,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:36:28,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:36:28,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:28,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:28,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:36:28,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:36:28,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:36:28,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:29,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:29,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:29,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:29,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:29,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:29,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:36:29,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:29,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:29,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:29,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:29,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:29,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:29,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 08:36:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:29,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:29,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:29,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:29,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:29,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:36:29,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:29,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:29,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:36:29,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:29,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:36:29,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:36:29,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064446871] [2020-10-28 08:36:29,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:29,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:36:29,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483072786] [2020-10-28 08:36:29,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:36:29,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:29,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:36:29,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:36:29,522 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 23 states. [2020-10-28 08:36:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:30,772 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-10-28 08:36:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:36:30,773 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-10-28 08:36:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:30,775 INFO L225 Difference]: With dead ends: 84 [2020-10-28 08:36:30,775 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 08:36:30,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:36:30,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 08:36:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2020-10-28 08:36:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 08:36:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-28 08:36:30,798 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 47 [2020-10-28 08:36:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:30,798 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-28 08:36:30,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:36:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-28 08:36:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:36:30,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:30,799 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:30,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:36:30,801 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:30,801 INFO L82 PathProgramCache]: Analyzing trace with hash -922969898, now seen corresponding path program 5 times [2020-10-28 08:36:30,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:30,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042989560] [2020-10-28 08:36:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:30,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:30,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:30,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 08:36:30,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:30,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-28 08:36:30,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:30,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:36:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:36:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 08:36:30,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:31,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:31,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:31,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:31,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:31,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:31,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:36:31,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:31,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:31,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:31,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:31,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:31,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:36:31,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 08:36:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:31,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:31,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:31,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:31,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:31,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:36:31,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:31,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:31,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:31,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:31,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:36:31,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:36:31,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 08:36:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:31,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:31,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:31,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:31,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:31,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:36:31,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:31,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:31,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:31,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:31,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:36:31,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:36:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:36:31,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042989560] [2020-10-28 08:36:31,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:31,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:36:31,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517687074] [2020-10-28 08:36:31,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:36:31,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:31,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:36:31,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:36:31,173 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 13 states. [2020-10-28 08:36:31,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:31,502 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-10-28 08:36:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:36:31,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-28 08:36:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:31,504 INFO L225 Difference]: With dead ends: 84 [2020-10-28 08:36:31,505 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 08:36:31,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:36:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 08:36:31,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-28 08:36:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 08:36:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-28 08:36:31,517 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 49 [2020-10-28 08:36:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:31,517 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-28 08:36:31,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:36:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-28 08:36:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 08:36:31,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:31,519 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:31,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:36:31,519 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:31,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:31,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1191088945, now seen corresponding path program 6 times [2020-10-28 08:36:31,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:31,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279761760] [2020-10-28 08:36:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:31,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:31,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:31,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:36,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:36,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 08:36:36,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:36,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:36:36,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:36,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:36,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:36:36,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:36:36,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 08:36:36,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:37,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:37,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:37,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:37,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:37,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:37,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:36:37,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:37,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:37,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:37,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:37,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:37,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:36:37,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 08:36:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:37,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:37,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:37,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:37,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:37,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:36:37,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:37,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:37,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:37,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:37,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:36:37,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:36:37,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 08:36:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:37,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:37,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:37,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:37,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:37,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:36:37,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:37,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:36:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:36:37,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 08:36:37,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279761760] [2020-10-28 08:36:37,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:37,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:36:37,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286266143] [2020-10-28 08:36:37,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:36:37,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:37,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:36:37,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:36:37,145 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 21 states. [2020-10-28 08:36:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:38,508 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-10-28 08:36:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:36:38,509 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-28 08:36:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:38,510 INFO L225 Difference]: With dead ends: 85 [2020-10-28 08:36:38,510 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 08:36:38,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:36:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 08:36:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2020-10-28 08:36:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 08:36:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-10-28 08:36:38,526 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 52 [2020-10-28 08:36:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:38,526 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-10-28 08:36:38,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:36:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-10-28 08:36:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:36:38,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:38,527 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:38,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:36:38,527 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:38,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:38,528 INFO L82 PathProgramCache]: Analyzing trace with hash -282347786, now seen corresponding path program 7 times [2020-10-28 08:36:38,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:38,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020225993] [2020-10-28 08:36:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:38,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:38,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:38,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:39,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:40,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:40,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:43,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:43,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 08:36:43,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:36:43,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:36:43,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:43,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:43,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:36:43,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:36:43,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 08:36:43,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:44,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:44,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:44,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:44,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:44,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:44,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:36:44,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:44,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:44,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:44,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:44,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:44,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:44,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 08:36:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:44,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:44,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:44,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:44,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:44,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:36:44,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:44,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:44,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:44,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:44,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:36:44,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:44,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 08:36:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:44,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:44,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:44,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:44,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:44,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:36:44,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:44,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:44,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:44,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:44,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:36:44,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:36:44,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020225993] [2020-10-28 08:36:44,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:44,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:36:44,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396552165] [2020-10-28 08:36:44,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:36:44,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:44,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:36:44,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:36:44,249 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 23 states. [2020-10-28 08:36:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:45,294 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2020-10-28 08:36:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 08:36:45,294 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-28 08:36:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:45,296 INFO L225 Difference]: With dead ends: 106 [2020-10-28 08:36:45,299 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 08:36:45,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:36:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 08:36:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 78. [2020-10-28 08:36:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 08:36:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-28 08:36:45,321 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 55 [2020-10-28 08:36:45,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:45,321 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-28 08:36:45,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:36:45,322 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-28 08:36:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 08:36:45,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:45,326 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:45,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:36:45,326 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:45,327 INFO L82 PathProgramCache]: Analyzing trace with hash -870235887, now seen corresponding path program 8 times [2020-10-28 08:36:45,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:45,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267586655] [2020-10-28 08:36:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:45,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:45,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:45,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:46,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:46,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:47,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:47,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:48,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:50,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:50,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 08:36:50,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:36:50,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:36:50,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:50,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:50,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:36:50,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:36:50,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 08:36:50,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:51,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:51,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:51,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:51,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:51,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:51,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:36:51,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:51,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:51,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:51,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:51,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:51,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:51,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 08:36:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:51,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:51,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:51,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:51,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:51,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:36:51,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:51,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:51,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:51,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:51,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:36:51,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:51,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 08:36:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:51,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:51,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:51,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:51,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:51,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:36:51,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:51,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:51,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:51,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:51,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:36:51,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:36:51,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267586655] [2020-10-28 08:36:51,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:51,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:36:51,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091715286] [2020-10-28 08:36:51,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:36:51,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:51,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:36:51,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:36:51,188 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 26 states. [2020-10-28 08:36:52,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:52,908 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2020-10-28 08:36:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 08:36:52,910 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-28 08:36:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:52,912 INFO L225 Difference]: With dead ends: 126 [2020-10-28 08:36:52,912 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 08:36:52,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=153, Invalid=1569, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 08:36:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 08:36:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 79. [2020-10-28 08:36:52,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 08:36:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-28 08:36:52,928 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 58 [2020-10-28 08:36:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:52,929 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-28 08:36:52,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:36:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-28 08:36:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 08:36:52,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:52,930 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:52,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:36:52,930 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:52,931 INFO L82 PathProgramCache]: Analyzing trace with hash 588651799, now seen corresponding path program 9 times [2020-10-28 08:36:52,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:52,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110981083] [2020-10-28 08:36:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:52,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:53,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:53,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 08:36:53,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:53,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-28 08:36:53,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:53,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:53,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:36:53,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:36:53,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 08:36:53,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:53,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:53,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:53,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:53,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:53,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:53,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:36:53,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:53,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:53,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:53,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:53,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:53,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:53,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 08:36:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:53,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:53,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:53,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:53,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:53,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:36:53,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:53,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:53,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:53,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:53,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:36:53,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:53,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 08:36:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:53,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:53,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:53,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:53,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:53,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:36:53,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:53,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:53,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:53,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:53,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:36:53,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:53,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 08:36:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:53,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:53,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:53,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:53,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:53,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:36:53,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:53,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:53,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:53,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:53,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:36:53,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 24 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 08:36:53,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110981083] [2020-10-28 08:36:53,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:53,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:36:53,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371619845] [2020-10-28 08:36:53,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:36:53,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:53,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:36:53,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:36:53,440 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 15 states. [2020-10-28 08:36:53,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:53,764 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2020-10-28 08:36:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:36:53,768 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-28 08:36:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:53,769 INFO L225 Difference]: With dead ends: 104 [2020-10-28 08:36:53,769 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 08:36:53,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:36:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 08:36:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-28 08:36:53,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 08:36:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-10-28 08:36:53,783 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 60 [2020-10-28 08:36:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:53,783 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-10-28 08:36:53,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:36:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-10-28 08:36:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 08:36:53,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:53,784 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:53,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:36:53,785 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:53,785 INFO L82 PathProgramCache]: Analyzing trace with hash 121641528, now seen corresponding path program 1 times [2020-10-28 08:36:53,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:53,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744425390] [2020-10-28 08:36:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:53,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:54,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:54,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:54,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:54,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:54,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:54,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:55,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:55,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:56,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:56,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:57,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:58,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:58,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 08:36:58,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 08:36:58,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 08:36:58,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:58,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:58,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:36:58,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:58,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:36:58,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:59,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:59,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:59,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:59,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:59,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:59,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:36:59,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:59,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:59,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:59,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:59,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:59,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:59,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 08:36:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:59,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:59,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:59,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:59,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:59,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:36:59,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:59,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:59,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:59,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:36:59,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:59,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:59,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 08:36:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:59,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:59,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:59,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:36:59,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:59,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:36:59,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:59,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:36:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:36:59,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:36:59,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 08:36:59,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744425390] [2020-10-28 08:36:59,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:59,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:36:59,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370357177] [2020-10-28 08:36:59,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:36:59,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:59,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:36:59,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:36:59,031 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 15 states. [2020-10-28 08:36:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:59,552 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2020-10-28 08:36:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:36:59,553 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-28 08:36:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:59,555 INFO L225 Difference]: With dead ends: 139 [2020-10-28 08:36:59,555 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 08:36:59,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:36:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 08:36:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 81. [2020-10-28 08:36:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 08:36:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-28 08:36:59,571 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 60 [2020-10-28 08:36:59,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:59,571 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-28 08:36:59,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:36:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-28 08:36:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 08:36:59,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:59,572 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:59,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:36:59,572 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:59,573 INFO L82 PathProgramCache]: Analyzing trace with hash 231980310, now seen corresponding path program 10 times [2020-10-28 08:36:59,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:59,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532047589] [2020-10-28 08:36:59,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:59,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:59,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:59,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:59,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:00,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:00,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:00,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:02,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:02,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:04,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:04,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:37:04,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:37:04,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:37:04,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:04,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:37:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:37:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 08:37:04,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:05,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:05,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:05,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:05,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:05,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:05,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:37:05,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:05,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:05,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:05,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 08:37:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:05,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:05,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:05,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:05,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:05,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:05,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:05,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:05,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:05,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:05,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:05,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:05,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 08:37:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:05,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:05,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:05,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:05,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:05,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:37:05,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:05,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:05,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:37:05,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:05,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:37:05,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 9 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 08:37:05,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532047589] [2020-10-28 08:37:05,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:05,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:37:05,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740638370] [2020-10-28 08:37:05,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:37:05,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:05,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:37:05,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:37:05,355 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 25 states. [2020-10-28 08:37:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:06,822 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-10-28 08:37:06,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:37:06,826 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-28 08:37:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:06,827 INFO L225 Difference]: With dead ends: 92 [2020-10-28 08:37:06,827 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 08:37:06,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 08:37:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 08:37:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-28 08:37:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 08:37:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-10-28 08:37:06,840 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 61 [2020-10-28 08:37:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:06,840 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-10-28 08:37:06,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:37:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-10-28 08:37:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:37:06,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:06,841 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:06,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:37:06,842 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:06,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:06,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1038504996, now seen corresponding path program 11 times [2020-10-28 08:37:06,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:06,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840036821] [2020-10-28 08:37:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:06,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:06,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:07,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:07,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:11,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:11,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:37:11,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:37:11,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:37:11,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:11,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:11,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:37:11,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:37:11,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 08:37:11,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:12,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:12,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:12,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:12,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:12,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:12,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:37:12,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:12,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:12,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:12,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 08:37:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:12,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:12,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:12,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:12,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:12,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:37:12,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:12,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:12,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:12,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:12,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:12,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:12,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 08:37:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:12,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:12,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:12,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:12,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:12,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:12,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:12,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:12,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:12,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:12,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:12,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:12,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 08:37:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:12,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:12,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:12,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:12,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:12,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:37:12,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:12,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:12,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:37:12,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:12,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:37:12,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 11 proven. 119 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 08:37:12,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840036821] [2020-10-28 08:37:12,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:12,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:37:12,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815669889] [2020-10-28 08:37:12,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:37:12,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:12,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:37:12,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:37:12,572 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 23 states. [2020-10-28 08:37:14,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:14,150 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2020-10-28 08:37:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:37:14,150 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-10-28 08:37:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:14,152 INFO L225 Difference]: With dead ends: 113 [2020-10-28 08:37:14,152 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 08:37:14,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=128, Invalid=1278, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 08:37:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 08:37:14,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2020-10-28 08:37:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 08:37:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-28 08:37:14,170 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 63 [2020-10-28 08:37:14,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:14,171 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-28 08:37:14,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:37:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-28 08:37:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 08:37:14,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:14,172 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:14,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:37:14,172 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:14,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1629285111, now seen corresponding path program 12 times [2020-10-28 08:37:14,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:14,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092270787] [2020-10-28 08:37:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:14,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:14,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:14,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:14,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:14,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:16,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:17,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:19,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:19,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 08:37:19,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:37:19,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:37:19,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:19,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:19,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:37:19,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:37:19,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 08:37:19,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:20,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:20,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:20,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:20,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:20,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:20,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:37:20,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:20,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:20,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:20,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:20,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:20,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:20,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 08:37:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:20,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:20,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:20,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:20,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:20,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:37:20,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:20,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:20,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:37:20,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:20,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:37:20,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:20,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 08:37:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:20,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:20,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:20,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:20,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:20,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:20,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:20,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:20,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:20,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:20,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:20,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:20,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 08:37:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:20,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:20,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:20,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:20,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:20,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:20,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:20,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:20,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:20,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:20,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:20,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 5 proven. 151 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 08:37:20,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092270787] [2020-10-28 08:37:20,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:20,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 08:37:20,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318833559] [2020-10-28 08:37:20,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 08:37:20,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:20,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 08:37:20,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:37:20,227 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 28 states. [2020-10-28 08:37:22,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:22,684 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2020-10-28 08:37:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 08:37:22,686 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-28 08:37:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:22,687 INFO L225 Difference]: With dead ends: 127 [2020-10-28 08:37:22,687 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 08:37:22,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=221, Invalid=2131, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 08:37:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 08:37:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-10-28 08:37:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 08:37:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-10-28 08:37:22,703 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 66 [2020-10-28 08:37:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:22,703 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-10-28 08:37:22,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 08:37:22,703 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-10-28 08:37:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:37:22,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:22,704 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:22,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:37:22,705 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:22,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:22,705 INFO L82 PathProgramCache]: Analyzing trace with hash -605449732, now seen corresponding path program 13 times [2020-10-28 08:37:22,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:22,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902425600] [2020-10-28 08:37:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:22,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:22,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:22,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:22,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:23,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:23,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:24,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:25,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:26,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:26,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:27,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:27,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:27,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:37:27,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:37:27,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:37:27,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:27,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:27,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:37:27,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:37:27,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 08:37:27,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:28,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:28,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:28,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:28,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:28,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:28,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:37:28,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:28,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:28,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:28,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:28,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:28,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:28,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 08:37:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:28,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:28,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:28,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:28,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:28,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:28,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:28,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:28,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:28,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:28,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:28,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:28,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 08:37:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:28,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:28,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:28,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:28,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:28,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:28,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:28,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:28,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:28,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:28,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:28,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:28,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 08:37:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:28,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:28,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:28,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:28,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:28,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:37:28,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:28,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:37:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:37:28,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 11 proven. 174 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 08:37:28,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902425600] [2020-10-28 08:37:28,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:28,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:37:28,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704938804] [2020-10-28 08:37:28,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:37:28,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:28,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:37:28,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:37:28,493 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 26 states. [2020-10-28 08:37:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:30,308 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2020-10-28 08:37:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 08:37:30,309 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 69 [2020-10-28 08:37:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:30,310 INFO L225 Difference]: With dead ends: 106 [2020-10-28 08:37:30,310 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 08:37:30,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 08:37:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 08:37:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-10-28 08:37:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 08:37:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2020-10-28 08:37:30,329 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 69 [2020-10-28 08:37:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:30,329 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2020-10-28 08:37:30,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:37:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2020-10-28 08:37:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 08:37:30,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:30,331 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:30,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:37:30,331 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:30,331 INFO L82 PathProgramCache]: Analyzing trace with hash -951100734, now seen corresponding path program 14 times [2020-10-28 08:37:30,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:30,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685633639] [2020-10-28 08:37:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:30,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:30,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:30,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:37:30,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:30,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-28 08:37:30,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:30,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:30,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:37:30,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:37:30,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 08:37:30,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:30,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:30,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:30,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:30,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:30,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:30,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:30,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:30,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:30,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:30,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:30,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 08:37:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:30,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:30,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:30,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:30,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:30,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:30,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:30,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:30,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:30,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:30,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:30,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:30,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 08:37:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:30,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:30,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:30,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:30,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:30,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:30,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:30,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:30,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:30,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:30,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:30,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:30,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 08:37:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:30,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:30,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:30,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:30,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:30,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:30,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:30,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:30,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:30,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:30,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:30,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:30,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 08:37:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:30,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:30,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:30,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:30,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:30,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:30,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:30,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:30,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:30,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:30,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:30,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 40 proven. 100 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 08:37:30,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685633639] [2020-10-28 08:37:30,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:30,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:37:30,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427644512] [2020-10-28 08:37:30,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:37:30,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:30,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:37:30,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:37:30,854 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand 17 states. [2020-10-28 08:37:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:31,270 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2020-10-28 08:37:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:37:31,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-28 08:37:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:31,273 INFO L225 Difference]: With dead ends: 128 [2020-10-28 08:37:31,273 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 08:37:31,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:37:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 08:37:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-28 08:37:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 08:37:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2020-10-28 08:37:31,291 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 71 [2020-10-28 08:37:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:31,291 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2020-10-28 08:37:31,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:37:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2020-10-28 08:37:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 08:37:31,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:31,293 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:31,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:37:31,293 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:31,293 INFO L82 PathProgramCache]: Analyzing trace with hash 769347293, now seen corresponding path program 15 times [2020-10-28 08:37:31,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:31,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972588243] [2020-10-28 08:37:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:31,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:31,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:31,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:31,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:32,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:36,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:36,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 08:37:36,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:37:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:37:36,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:36,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:37:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:37:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 08:37:36,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:36,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:36,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:36,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:36,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:36,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:36,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:36,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:36,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:36,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:36,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 08:37:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:36,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:36,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:36,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:36,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:36,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:36,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:36,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:36,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:36,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 08:37:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:37,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:37,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:37,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:37,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:37,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:37,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:37,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:37,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:37,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:37,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:37,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:37,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 08:37:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:37,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:37,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:37,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:37,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:37,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:37:37,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:37,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:37,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:37:37,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:37,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:37:37,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:37,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 08:37:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:37,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:37,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:37,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:37,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:37,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:37,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:37,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:37,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:37,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:37,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:37,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 13 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 08:37:37,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972588243] [2020-10-28 08:37:37,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:37,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:37:37,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795636282] [2020-10-28 08:37:37,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:37:37,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:37,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:37:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:37:37,132 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand 27 states. [2020-10-28 08:37:39,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:39,300 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-28 08:37:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 08:37:39,301 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2020-10-28 08:37:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:39,302 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:37:39,302 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 08:37:39,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 08:37:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 08:37:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2020-10-28 08:37:39,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 08:37:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2020-10-28 08:37:39,329 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 74 [2020-10-28 08:37:39,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:39,329 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2020-10-28 08:37:39,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:37:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2020-10-28 08:37:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 08:37:39,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:39,331 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:39,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:37:39,331 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:39,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1503190814, now seen corresponding path program 16 times [2020-10-28 08:37:39,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:39,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632412906] [2020-10-28 08:37:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:39,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:39,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:39,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:39,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:40,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:42,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:43,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:43,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:43,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:43,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:43,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:43,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:44,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:44,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 08:37:44,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 08:37:44,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:37:44,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:44,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:44,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 08:37:44,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:37:44,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 08:37:44,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:45,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:45,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:45,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:45,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:45,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:45,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:37:45,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:45,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:45,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:45,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 08:37:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:45,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:45,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:45,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:45,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:45,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:45,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:45,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:45,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:45,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 08:37:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:45,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:45,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:45,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:45,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:45,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:45,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:45,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:45,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:45,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 08:37:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:45,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:45,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:45,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:45,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:45,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:45,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:45,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:45,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:45,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:45,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:45,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:45,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 08:37:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:45,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:45,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:45,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:45,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:45,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:45,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:45,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:45,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:45,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:45,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:45,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 8 proven. 187 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 08:37:45,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632412906] [2020-10-28 08:37:45,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:45,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 08:37:45,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937396659] [2020-10-28 08:37:45,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 08:37:45,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:45,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 08:37:45,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=749, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:37:45,469 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 29 states. [2020-10-28 08:37:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:47,400 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2020-10-28 08:37:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 08:37:47,402 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2020-10-28 08:37:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:47,404 INFO L225 Difference]: With dead ends: 146 [2020-10-28 08:37:47,404 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 08:37:47,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=148, Invalid=1832, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 08:37:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 08:37:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 123. [2020-10-28 08:37:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 08:37:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2020-10-28 08:37:47,437 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 77 [2020-10-28 08:37:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:47,437 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2020-10-28 08:37:47,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 08:37:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2020-10-28 08:37:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:37:47,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:47,438 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:47,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:37:47,439 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash 954752713, now seen corresponding path program 2 times [2020-10-28 08:37:47,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:47,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102286463] [2020-10-28 08:37:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:47,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:47,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:47,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:47,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:49,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:49,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:50,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:50,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:50,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:50,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:51,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:51,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:51,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:52,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:52,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 08:37:52,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 08:37:52,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 08:37:52,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:52,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:52,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:37:52,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:37:52,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 08:37:52,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:52,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:52,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:52,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:52,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:52,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:52,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:37:52,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:52,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:52,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:52,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:52,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:37:52,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:52,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 08:37:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:52,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:52,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:52,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:52,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:52,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:52,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:52,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:52,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:52,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:37:52,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:52,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:52,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 08:37:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:52,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:52,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:52,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:52,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:52,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:52,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:52,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:52,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:52,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:37:52,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:52,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:52,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 08:37:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:52,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:52,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:52,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:52,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:52,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:52,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:52,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:52,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:52,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:37:52,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:52,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:52,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-28 08:37:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:52,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:52,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:52,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:52,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:52,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:52,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:52,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:52,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:52,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:37:52,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:52,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 8 proven. 176 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 08:37:52,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102286463] [2020-10-28 08:37:52,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:52,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:37:52,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991037623] [2020-10-28 08:37:52,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:37:52,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:52,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:37:52,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:37:52,769 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand 16 states. [2020-10-28 08:37:53,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:53,414 INFO L93 Difference]: Finished difference Result 194 states and 218 transitions. [2020-10-28 08:37:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:37:53,416 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-10-28 08:37:53,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:53,418 INFO L225 Difference]: With dead ends: 194 [2020-10-28 08:37:53,418 INFO L226 Difference]: Without dead ends: 158 [2020-10-28 08:37:53,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:37:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-28 08:37:53,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 125. [2020-10-28 08:37:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 08:37:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2020-10-28 08:37:53,445 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 79 [2020-10-28 08:37:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:53,445 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2020-10-28 08:37:53,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:37:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2020-10-28 08:37:53,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 08:37:53,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:53,447 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:53,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:37:53,447 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:53,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:53,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1116449603, now seen corresponding path program 17 times [2020-10-28 08:37:53,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:53,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381588796] [2020-10-28 08:37:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:53,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:53,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:53,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:54,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:54,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:54,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:56,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:56,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:56,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:58,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:58,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 08:37:58,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:37:58,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:37:58,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:58,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:37:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:37:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 08:37:58,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:59,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:59,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:59,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:59,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:59,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:59,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:59,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:59,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:59,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:37:59,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:59,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:37:59,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:59,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 08:37:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:59,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:59,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:59,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:59,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:59,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:37:59,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:59,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:59,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:59,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:59,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:59,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:59,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 08:37:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:59,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:59,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:59,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:59,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:59,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:59,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:59,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:59,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 08:37:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:59,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:59,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:59,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:59,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:59,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:59,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:59,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:59,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:59,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 08:37:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:59,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:59,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:59,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:37:59,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:59,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:37:59,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:59,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:59,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:59,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:59,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:37:59,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 8 proven. 219 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 08:37:59,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381588796] [2020-10-28 08:37:59,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:59,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:37:59,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991262681] [2020-10-28 08:37:59,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:37:59,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:37:59,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:37:59,722 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 31 states. [2020-10-28 08:38:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:02,552 INFO L93 Difference]: Finished difference Result 174 states and 195 transitions. [2020-10-28 08:38:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 08:38:02,553 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 80 [2020-10-28 08:38:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:02,555 INFO L225 Difference]: With dead ends: 174 [2020-10-28 08:38:02,555 INFO L226 Difference]: Without dead ends: 171 [2020-10-28 08:38:02,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=198, Invalid=2558, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 08:38:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-28 08:38:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 126. [2020-10-28 08:38:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 08:38:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 139 transitions. [2020-10-28 08:38:02,585 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 139 transitions. Word has length 80 [2020-10-28 08:38:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:02,585 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 139 transitions. [2020-10-28 08:38:02,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:38:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 139 transitions. [2020-10-28 08:38:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 08:38:02,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:02,587 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:02,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:38:02,587 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:02,587 INFO L82 PathProgramCache]: Analyzing trace with hash 151153859, now seen corresponding path program 18 times [2020-10-28 08:38:02,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:02,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800666902] [2020-10-28 08:38:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:02,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:02,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:02,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 08:38:02,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:02,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-28 08:38:02,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:02,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:02,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:38:02,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:38:02,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 08:38:02,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:03,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:03,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:03,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:03,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:03,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:03,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:38:03,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:03,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:03,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:03,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:03,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:03,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:03,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 08:38:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:03,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:03,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:03,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:03,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:03,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:03,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:03,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:03,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:03,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:03,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:03,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:03,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 08:38:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:03,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:03,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:03,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:03,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:03,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:03,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:03,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:03,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:03,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:03,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:03,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:03,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 08:38:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:03,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:03,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:03,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:03,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:03,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:03,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:03,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:03,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:03,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:03,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:03,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:03,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 08:38:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:03,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:03,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:03,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:03,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:03,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:03,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:03,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:03,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:03,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:03,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:03,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:03,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 08:38:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:03,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:03,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:03,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:03,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:03,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:03,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:03,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:03,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 60 proven. 126 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 08:38:03,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800666902] [2020-10-28 08:38:03,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:03,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:38:03,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108269751] [2020-10-28 08:38:03,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:38:03,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:03,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:38:03,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:38:03,262 INFO L87 Difference]: Start difference. First operand 126 states and 139 transitions. Second operand 19 states. [2020-10-28 08:38:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:03,761 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2020-10-28 08:38:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:38:03,762 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-10-28 08:38:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:03,763 INFO L225 Difference]: With dead ends: 144 [2020-10-28 08:38:03,763 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 08:38:03,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:38:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 08:38:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-28 08:38:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 08:38:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2020-10-28 08:38:03,780 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 82 [2020-10-28 08:38:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:03,781 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2020-10-28 08:38:03,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:38:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2020-10-28 08:38:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 08:38:03,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:03,782 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:03,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:38:03,782 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1049098268, now seen corresponding path program 3 times [2020-10-28 08:38:03,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:03,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340583332] [2020-10-28 08:38:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:03,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:04,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:04,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:04,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:04,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:05,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:06,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:06,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:07,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:07,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:08,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:08,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 08:38:08,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:38:08,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:38:08,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:08,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:08,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:38:08,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:38:08,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:38:08,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:09,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:09,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:09,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:09,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:09,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:09,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:38:09,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:09,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:09,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:09,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:09,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:38:09,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:09,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 08:38:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:09,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:09,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:09,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:09,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:09,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:38:09,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:09,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:09,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:09,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:38:09,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:09,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:09,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 08:38:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:09,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:09,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:09,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:09,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:09,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:38:09,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:09,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:09,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:09,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:38:09,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:09,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:09,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 08:38:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:09,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:09,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:09,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:09,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:09,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:09,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:09,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:09,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:09,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:38:09,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:09,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:09,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 08:38:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:09,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:09,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:09,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:09,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:09,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:38:09,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:09,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:09,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:09,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:38:09,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:09,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 8 proven. 210 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 08:38:09,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340583332] [2020-10-28 08:38:09,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:09,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:38:09,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643066179] [2020-10-28 08:38:09,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:38:09,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:38:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:38:09,110 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand 17 states. [2020-10-28 08:38:09,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:09,693 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2020-10-28 08:38:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:38:09,693 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-28 08:38:09,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:09,694 INFO L225 Difference]: With dead ends: 189 [2020-10-28 08:38:09,695 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 08:38:09,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=609, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:38:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 08:38:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2020-10-28 08:38:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 08:38:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2020-10-28 08:38:09,719 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 82 [2020-10-28 08:38:09,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:09,719 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2020-10-28 08:38:09,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:38:09,719 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2020-10-28 08:38:09,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:38:09,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:09,720 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:09,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:38:09,720 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:09,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1188679426, now seen corresponding path program 19 times [2020-10-28 08:38:09,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:09,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525232130] [2020-10-28 08:38:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:09,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:09,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:10,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:10,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:11,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:13,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:13,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:14,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:14,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:14,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:14,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:38:14,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:38:14,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:38:14,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:14,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:14,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 08:38:14,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:38:14,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 08:38:14,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:16,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:16,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:16,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:16,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:16,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:16,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:38:16,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:16,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:16,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:16,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:16,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:16,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:16,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 08:38:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:16,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:16,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:16,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:16,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:16,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:38:16,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:16,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:16,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:38:16,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:16,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:38:16,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:16,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 08:38:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:16,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:16,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:16,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:16,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:16,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:38:16,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:16,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:16,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:16,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:16,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:16,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:16,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 08:38:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:16,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:16,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:16,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:16,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:16,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:38:16,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:16,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:16,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:16,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:16,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:16,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:16,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-28 08:38:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:16,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:16,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:16,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:16,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:16,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:16,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:16,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:16,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:16,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:16,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:16,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 7 proven. 264 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 08:38:16,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525232130] [2020-10-28 08:38:16,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:16,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 08:38:16,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255358485] [2020-10-28 08:38:16,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 08:38:16,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:16,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 08:38:16,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:38:16,659 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand 34 states. [2020-10-28 08:38:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:23,019 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2020-10-28 08:38:23,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-28 08:38:23,019 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 83 [2020-10-28 08:38:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:23,021 INFO L225 Difference]: With dead ends: 168 [2020-10-28 08:38:23,021 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 08:38:23,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=548, Invalid=5614, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 08:38:23,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 08:38:23,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 117. [2020-10-28 08:38:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 08:38:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2020-10-28 08:38:23,052 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 83 [2020-10-28 08:38:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:23,052 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2020-10-28 08:38:23,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 08:38:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2020-10-28 08:38:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 08:38:23,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:23,053 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:23,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 08:38:23,054 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:23,054 INFO L82 PathProgramCache]: Analyzing trace with hash -822974008, now seen corresponding path program 20 times [2020-10-28 08:38:23,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:23,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056939262] [2020-10-28 08:38:23,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:23,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:23,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:23,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:23,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:24,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:28,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:28,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 08:38:28,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:38:28,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:38:28,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:28,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:38:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:38:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 08:38:28,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:29,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:29,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:29,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:29,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:29,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:29,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:29,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:29,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:29,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:29,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:29,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:29,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:29,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 08:38:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:29,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:29,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:29,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:29,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:29,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:29,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:29,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:29,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:29,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:29,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:29,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:29,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 08:38:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:29,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:29,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:29,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:29,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:29,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:29,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:29,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:29,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:29,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 08:38:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:29,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:29,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:29,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:29,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:29,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:29,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:29,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:29,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:29,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:29,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:29,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:29,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 08:38:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:29,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:29,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:29,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:29,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:29,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:29,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:29,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:29,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:29,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:29,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:29,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:29,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-28 08:38:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:29,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:29,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:29,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:29,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:29,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:29,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:29,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:29,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:29,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:29,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:29,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 10 proven. 205 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 08:38:29,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056939262] [2020-10-28 08:38:29,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:29,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:38:29,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018467366] [2020-10-28 08:38:29,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:38:29,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:29,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:38:29,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:38:29,134 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 31 states. [2020-10-28 08:38:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:30,961 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-10-28 08:38:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 08:38:30,962 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-10-28 08:38:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:30,963 INFO L225 Difference]: With dead ends: 153 [2020-10-28 08:38:30,964 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 08:38:30,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 08:38:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 08:38:31,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2020-10-28 08:38:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 08:38:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 163 transitions. [2020-10-28 08:38:31,005 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 163 transitions. Word has length 85 [2020-10-28 08:38:31,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:31,006 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 163 transitions. [2020-10-28 08:38:31,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:38:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 163 transitions. [2020-10-28 08:38:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 08:38:31,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:31,007 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:31,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 08:38:31,007 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:31,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2023226135, now seen corresponding path program 4 times [2020-10-28 08:38:31,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:31,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762759159] [2020-10-28 08:38:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:31,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:31,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:31,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:31,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:31,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:36,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:36,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 08:38:36,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:38:36,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:38:36,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:36,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:36,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:38:36,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:38:36,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 08:38:36,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:36,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:36,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:36,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:36,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:36,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:36,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:38:36,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:36,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:38:36,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:36,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 08:38:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:36,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:36,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:36,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:36,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:36,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:38:36,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:36,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:36,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:36,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:38:36,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:36,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:36,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 08:38:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:36,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:36,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:36,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:36,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:36,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:38:36,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:36,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:36,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:36,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:38:36,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:36,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:36,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 08:38:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:36,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:36,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:36,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:36,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:36,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:38:36,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:36,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:38:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:36,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:36,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-28 08:38:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:36,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:36,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:36,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:36,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:36,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:38:36,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:36,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:36,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:36,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:38:36,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:36,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 8 proven. 247 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 08:38:36,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762759159] [2020-10-28 08:38:36,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:36,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:38:36,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20270826] [2020-10-28 08:38:36,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:38:36,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:36,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:38:36,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:38:36,365 INFO L87 Difference]: Start difference. First operand 144 states and 163 transitions. Second operand 18 states. [2020-10-28 08:38:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:37,186 INFO L93 Difference]: Finished difference Result 223 states and 256 transitions. [2020-10-28 08:38:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:38:37,187 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-28 08:38:37,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:37,188 INFO L225 Difference]: With dead ends: 223 [2020-10-28 08:38:37,188 INFO L226 Difference]: Without dead ends: 187 [2020-10-28 08:38:37,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=350, Invalid=642, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:38:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-28 08:38:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 146. [2020-10-28 08:38:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-28 08:38:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 165 transitions. [2020-10-28 08:38:37,236 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 165 transitions. Word has length 85 [2020-10-28 08:38:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:37,237 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 165 transitions. [2020-10-28 08:38:37,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:38:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 165 transitions. [2020-10-28 08:38:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 08:38:37,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:37,238 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:37,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 08:38:37,238 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:37,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1055486621, now seen corresponding path program 21 times [2020-10-28 08:38:37,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:37,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437215848] [2020-10-28 08:38:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:37,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:37,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:37,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:37,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:42,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:42,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 08:38:42,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:38:42,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:38:42,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:42,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 08:38:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:38:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 08:38:42,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:43,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:43,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:43,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:43,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:43,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:43,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:38:43,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:43,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:43,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:43,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:43,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:43,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:43,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 08:38:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:43,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:43,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:43,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:43,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:43,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:43,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:43,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 08:38:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:43,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:43,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:43,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:43,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:43,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:43,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:43,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:43,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:43,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:43,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:43,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:43,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 08:38:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:43,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:43,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:43,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:43,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:43,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:43,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:43,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:43,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:43,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:43,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:43,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:43,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 08:38:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:43,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:43,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:43,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:43,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:43,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:43,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:43,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:43,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:43,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:43,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 11 proven. 289 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 08:38:43,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437215848] [2020-10-28 08:38:43,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:43,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 08:38:43,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870071089] [2020-10-28 08:38:43,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 08:38:43,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:43,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 08:38:43,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 08:38:43,832 INFO L87 Difference]: Start difference. First operand 146 states and 165 transitions. Second operand 35 states. [2020-10-28 08:38:47,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:47,695 INFO L93 Difference]: Finished difference Result 179 states and 202 transitions. [2020-10-28 08:38:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 08:38:47,695 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2020-10-28 08:38:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:47,697 INFO L225 Difference]: With dead ends: 179 [2020-10-28 08:38:47,697 INFO L226 Difference]: Without dead ends: 176 [2020-10-28 08:38:47,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=321, Invalid=2985, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 08:38:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-28 08:38:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 135. [2020-10-28 08:38:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 08:38:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2020-10-28 08:38:47,730 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 86 [2020-10-28 08:38:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:47,730 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2020-10-28 08:38:47,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 08:38:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2020-10-28 08:38:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 08:38:47,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:47,731 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:47,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 08:38:47,731 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 27759267, now seen corresponding path program 22 times [2020-10-28 08:38:47,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:47,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582950030] [2020-10-28 08:38:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:47,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:48,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:48,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:48,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:48,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:48,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:48,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:49,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:50,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:51,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:51,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:52,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:52,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 08:38:52,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:38:52,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:38:52,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:52,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:52,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:38:52,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:38:52,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 08:38:52,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:53,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:53,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:53,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:53,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:53,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:53,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:38:53,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:53,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:53,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:38:53,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:53,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:38:53,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:53,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 08:38:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:53,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:53,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:53,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:53,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:53,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:38:53,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:53,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:53,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:53,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:53,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:53,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:53,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 08:38:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:53,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:53,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:53,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:53,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:53,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:38:53,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:53,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:53,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:53,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:53,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:53,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:53,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 08:38:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:53,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:53,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:53,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:53,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:53,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:38:53,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:53,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:53,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:38:53,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:53,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:38:53,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:54,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 08:38:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:54,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:54,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:54,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:54,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:54,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:38:54,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:54,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:54,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:54,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:54,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 08:38:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:54,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:54,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:54,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:38:54,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:54,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:38:54,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:54,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:54,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:54,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:54,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:38:54,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 15 proven. 244 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 08:38:54,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582950030] [2020-10-28 08:38:54,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:54,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 08:38:54,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357555366] [2020-10-28 08:38:54,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 08:38:54,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:54,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 08:38:54,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=925, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:38:54,050 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand 32 states. [2020-10-28 08:38:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:58,153 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2020-10-28 08:38:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 08:38:58,154 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 88 [2020-10-28 08:38:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:58,155 INFO L225 Difference]: With dead ends: 166 [2020-10-28 08:38:58,155 INFO L226 Difference]: Without dead ends: 163 [2020-10-28 08:38:58,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=315, Invalid=4107, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 08:38:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-28 08:38:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 116. [2020-10-28 08:38:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 08:38:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2020-10-28 08:38:58,187 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 88 [2020-10-28 08:38:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:58,187 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2020-10-28 08:38:58,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 08:38:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2020-10-28 08:38:58,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:38:58,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:58,188 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:58,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 08:38:58,188 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:58,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:58,189 INFO L82 PathProgramCache]: Analyzing trace with hash -379258904, now seen corresponding path program 23 times [2020-10-28 08:38:58,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:58,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292060688] [2020-10-28 08:38:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:58,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:58,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:58,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:59,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:59,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:00,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:00,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:00,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:03,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:03,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:39:03,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:39:03,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:39:03,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:03,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:03,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 08:39:03,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:39:03,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 08:39:03,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:04,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:39:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:04,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:04,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:04,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:39:04,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:04,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:39:04,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:04,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:39:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:39:04,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:04,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 08:39:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:04,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:04,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:04,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:04,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:04,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:39:04,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:04,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:04,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:04,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:04,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:04,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:04,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 08:39:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:04,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:04,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:04,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:04,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:04,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:39:04,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:04,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:04,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:04,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:04,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:04,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:04,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 08:39:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:04,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:04,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:04,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:04,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:04,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:39:04,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:04,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:04,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:04,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-28 08:39:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:04,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:04,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:04,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:04,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:04,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:39:04,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:04,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:04,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:04,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:04,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:04,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:04,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-28 08:39:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:04,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:04,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:04,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:04,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:04,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:39:04,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:04,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:04,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 10 proven. 272 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 08:39:04,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292060688] [2020-10-28 08:39:04,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:39:04,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 08:39:04,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146726605] [2020-10-28 08:39:04,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 08:39:04,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:39:04,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 08:39:04,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 08:39:04,940 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand 35 states. [2020-10-28 08:39:08,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:39:08,303 INFO L93 Difference]: Finished difference Result 195 states and 220 transitions. [2020-10-28 08:39:08,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 08:39:08,304 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 91 [2020-10-28 08:39:08,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:39:08,307 INFO L225 Difference]: With dead ends: 195 [2020-10-28 08:39:08,307 INFO L226 Difference]: Without dead ends: 192 [2020-10-28 08:39:08,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=253, Invalid=3287, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 08:39:08,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-28 08:39:08,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 143. [2020-10-28 08:39:08,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 08:39:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2020-10-28 08:39:08,343 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 91 [2020-10-28 08:39:08,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:39:08,344 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2020-10-28 08:39:08,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 08:39:08,344 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2020-10-28 08:39:08,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 08:39:08,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:39:08,345 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:39:08,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 08:39:08,345 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:39:08,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:39:08,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1322160978, now seen corresponding path program 24 times [2020-10-28 08:39:08,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:39:08,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840243500] [2020-10-28 08:39:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:39:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:08,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:08,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:08,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 08:39:08,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:08,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-28 08:39:08,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:08,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:08,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:39:08,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:39:08,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 08:39:08,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:09,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:39:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:09,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:09,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:09,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:39:09,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:09,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:39:09,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:09,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:09,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:39:09,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:09,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:39:09,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:09,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 08:39:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:09,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:09,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:09,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:09,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:09,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:39:09,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:09,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:09,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:09,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:09,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:09,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:09,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 08:39:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:09,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:09,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:09,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:09,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:09,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:39:09,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:09,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:09,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:09,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:09,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:09,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:09,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 08:39:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:09,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:09,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:09,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:09,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:09,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:39:09,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:09,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:09,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:09,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 08:39:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:09,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:09,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:09,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:09,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:09,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:39:09,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:09,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:09,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:09,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-28 08:39:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:09,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:09,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:09,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:09,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:09,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:39:09,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:09,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:09,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:09,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:09,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:09,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:09,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-28 08:39:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:09,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:09,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:09,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:09,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:09,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:39:09,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:09,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:09,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:09,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:09,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:09,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 84 proven. 155 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-28 08:39:09,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840243500] [2020-10-28 08:39:09,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:39:09,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:39:09,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444113617] [2020-10-28 08:39:09,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:39:09,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:39:09,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:39:09,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:39:09,176 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand 21 states. [2020-10-28 08:39:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:39:09,875 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2020-10-28 08:39:09,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:39:09,876 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-10-28 08:39:09,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:39:09,878 INFO L225 Difference]: With dead ends: 180 [2020-10-28 08:39:09,878 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 08:39:09,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:39:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 08:39:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-28 08:39:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 08:39:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2020-10-28 08:39:09,908 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 93 [2020-10-28 08:39:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:39:09,908 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2020-10-28 08:39:09,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:39:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2020-10-28 08:39:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 08:39:09,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:39:09,910 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:39:09,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 08:39:09,910 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:39:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:39:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1164914557, now seen corresponding path program 25 times [2020-10-28 08:39:09,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:39:09,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672854578] [2020-10-28 08:39:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:39:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:09,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:10,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:10,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:10,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:13,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:13,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:13,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:14,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:14,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:14,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:14,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:14,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:14,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 08:39:14,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:39:14,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 08:39:14,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:14,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:14,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 08:39:14,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:39:14,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-28 08:39:14,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:15,712 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2020-10-28 08:39:15,868 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-10-28 08:39:17,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:39:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:17,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:17,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:17,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:39:17,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:17,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:39:17,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:17,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:17,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:39:17,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:17,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:39:17,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:17,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 08:39:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:17,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:17,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:17,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:17,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:17,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:39:17,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:17,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:17,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:17,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:17,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:17,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:17,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 08:39:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:17,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:17,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:17,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:17,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:17,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:39:17,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:17,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:17,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:17,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:17,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:17,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:17,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 08:39:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:17,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:17,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:17,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:17,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:17,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:39:17,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:17,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:17,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:39:17,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:17,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:39:17,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:17,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 08:39:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:17,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:17,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:17,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:17,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:17,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:39:17,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:17,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:17,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:17,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:17,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:17,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-28 08:39:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:17,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:17,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:17,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:39:17,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:17,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:39:17,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:17,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:17,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:17,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:17,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:39:17,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 15 proven. 317 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 08:39:17,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672854578] [2020-10-28 08:39:17,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:39:17,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 08:39:17,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447186715] [2020-10-28 08:39:17,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 08:39:17,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:39:17,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 08:39:17,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 08:39:17,406 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand 35 states.