/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block 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=BIGGEST --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 -i ../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:31:05,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:31:05,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:31:05,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:31:05,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:31:05,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:31:05,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:31:05,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:31:05,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:31:05,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:31:05,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:31:05,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:31:05,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:31:05,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:31:05,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:31:05,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:31:05,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:31:05,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:31:05,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:31:05,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:31:05,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:31:05,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:31:05,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:31:05,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:31:05,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:31:05,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:31:05,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:31:05,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:31:05,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:31:05,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:31:05,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:31:05,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:31:05,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:31:05,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:31:05,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:31:05,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:31:05,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:31:05,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:31:05,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:31:05,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:31:05,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:31:05,163 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 [2020-10-12 09:31:05,185 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:31:05,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:31:05,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:31:05,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:31:05,187 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:31:05,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:31:05,187 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:31:05,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:31:05,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:31:05,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:31:05,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:31:05,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:31:05,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:31:05,188 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:31:05,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:31:05,189 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:31:05,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:31:05,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:31:05,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:31:05,190 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:31:05,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:31:05,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:31:05,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:31:05,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:31:05,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:31:05,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:31:05,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:31:05,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:31:05,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:31:05,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:31:05,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:31:05,520 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:31:05,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:31:05,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:31:05,531 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:31:05,531 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c [2020-10-12 09:31:05,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de08b2289/1359c22cf42248c983097630544be174/FLAG7a0d55297 [2020-10-12 09:31:06,083 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:31:06,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c [2020-10-12 09:31:06,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de08b2289/1359c22cf42248c983097630544be174/FLAG7a0d55297 [2020-10-12 09:31:06,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de08b2289/1359c22cf42248c983097630544be174 [2020-10-12 09:31:06,515 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:31:06,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:31:06,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:31:06,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:31:06,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:31:06,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:06,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad4c324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06, skipping insertion in model container [2020-10-12 09:31:06,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:06,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:31:06,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:31:06,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:31:06,773 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:31:06,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:31:06,820 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:31:06,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06 WrapperNode [2020-10-12 09:31:06,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:31:06,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:31:06,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:31:06,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:31:06,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:06,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:06,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:06,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:06,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:06,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:06,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (1/1) ... [2020-10-12 09:31:06,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:31:06,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:31:06,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:31:06,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:31:06,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (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 [2020-10-12 09:31:07,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:31:07,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:31:07,005 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 09:31:07,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:31:07,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:31:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:31:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 09:31:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 09:31:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:31:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:31:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:31:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:31:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:31:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:31:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:31:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:31:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:31:07,300 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:31:07,300 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 09:31:07,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:31:07 BoogieIcfgContainer [2020-10-12 09:31:07,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:31:07,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:31:07,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:31:07,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:31:07,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:31:06" (1/3) ... [2020-10-12 09:31:07,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3476d1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:31:07, skipping insertion in model container [2020-10-12 09:31:07,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:31:06" (2/3) ... [2020-10-12 09:31:07,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3476d1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:31:07, skipping insertion in model container [2020-10-12 09:31:07,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:31:07" (3/3) ... [2020-10-12 09:31:07,313 INFO L109 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2020-10-12 09:31:07,324 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:31:07,331 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:31:07,344 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:31:07,365 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:31:07,365 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:31:07,365 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:31:07,365 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:31:07,365 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:31:07,366 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:31:07,366 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:31:07,366 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:31:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-12 09:31:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 09:31:07,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:07,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:07,390 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1594784639, now seen corresponding path program 1 times [2020-10-12 09:31:07,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:07,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852311188] [2020-10-12 09:31:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:07,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:07,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:07,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:07,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 09:31:07,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:31:07,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-12 09:31:07,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:31:07,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 09:31:07,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:31:07,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:31:07,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:07,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:07,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:07,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:07,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:07,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 09:31:07,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:07,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:07,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:07,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:31:07,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:07,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852311188] [2020-10-12 09:31:07,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:31:07,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:31:07,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365161052] [2020-10-12 09:31:07,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:31:07,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:07,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:31:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:31:07,998 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-10-12 09:31:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:08,172 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-10-12 09:31:08,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:31:08,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-12 09:31:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:08,185 INFO L225 Difference]: With dead ends: 52 [2020-10-12 09:31:08,185 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 09:31:08,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:31:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 09:31:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2020-10-12 09:31:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 09:31:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-12 09:31:08,255 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-10-12 09:31:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:08,256 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-12 09:31:08,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:31:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-12 09:31:08,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 09:31:08,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:08,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:08,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:31:08,268 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:08,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:08,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1672402483, now seen corresponding path program 1 times [2020-10-12 09:31:08,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:08,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118516187] [2020-10-12 09:31:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:08,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:08,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 09:31:08,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:08,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-12 09:31:08,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:08,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:31:08,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:08,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 09:31:08,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:08,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:08,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:08,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:08,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:08,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:08,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:08,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:08,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:08,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:08,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:08,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118516187] [2020-10-12 09:31:08,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:31:08,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 09:31:08,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274341826] [2020-10-12 09:31:08,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:31:08,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:08,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:31:08,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:31:08,434 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-12 09:31:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:08,531 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-12 09:31:08,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:31:08,532 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-12 09:31:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:08,533 INFO L225 Difference]: With dead ends: 35 [2020-10-12 09:31:08,533 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 09:31:08,535 INFO L675 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 [2020-10-12 09:31:08,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 09:31:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-12 09:31:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 09:31:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-12 09:31:08,542 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2020-10-12 09:31:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:08,542 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-12 09:31:08,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:31:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-12 09:31:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 09:31:08,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:08,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:08,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:31:08,544 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:08,544 INFO L82 PathProgramCache]: Analyzing trace with hash -973616762, now seen corresponding path program 1 times [2020-10-12 09:31:08,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:08,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625097934] [2020-10-12 09:31:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:08,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:08,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 09:31:08,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:31:08,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-12 09:31:08,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:31:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 09:31:08,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 09:31:08,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:08,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:08,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:08,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:08,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:08,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:08,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:31:08,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:08,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:08,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:08,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:31:08,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:08,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625097934] [2020-10-12 09:31:08,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:08,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:31:08,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479843607] [2020-10-12 09:31:08,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:31:08,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:08,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:31:08,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:31:08,869 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-12 09:31:08,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:08,995 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-12 09:31:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:31:08,996 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-12 09:31:08,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:08,997 INFO L225 Difference]: With dead ends: 42 [2020-10-12 09:31:08,997 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 09:31:08,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:31:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 09:31:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-10-12 09:31:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 09:31:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-12 09:31:09,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-10-12 09:31:09,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:09,006 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-12 09:31:09,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:31:09,007 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-12 09:31:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 09:31:09,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:09,008 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:09,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:31:09,008 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:09,009 INFO L82 PathProgramCache]: Analyzing trace with hash 311532710, now seen corresponding path program 1 times [2020-10-12 09:31:09,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:09,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280178784] [2020-10-12 09:31:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:09,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:09,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:09,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 09:31:09,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:09,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-12 09:31:09,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:31:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:09,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:31:09,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:09,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:09,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:09,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:09,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:09,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:09,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:09,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:09,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:09,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:09,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:09,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:09,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280178784] [2020-10-12 09:31:09,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:09,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:31:09,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534221264] [2020-10-12 09:31:09,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:31:09,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:09,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:31:09,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:31:09,133 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-12 09:31:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:09,198 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-12 09:31:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:31:09,199 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-12 09:31:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:09,200 INFO L225 Difference]: With dead ends: 38 [2020-10-12 09:31:09,200 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 09:31:09,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:31:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 09:31:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-12 09:31:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 09:31:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-12 09:31:09,206 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-12 09:31:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:09,207 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-12 09:31:09,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:31:09,207 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-12 09:31:09,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 09:31:09,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:09,208 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:09,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:31:09,208 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:09,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1377375713, now seen corresponding path program 2 times [2020-10-12 09:31:09,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:09,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607503481] [2020-10-12 09:31:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:09,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:09,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:09,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:09,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 09:31:09,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:31:09,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-10-12 09:31:09,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:31:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 09:31:09,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:09,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:09,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:09,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:09,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:09,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:09,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:09,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:09,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:09,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:09,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:09,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:09,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607503481] [2020-10-12 09:31:09,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:09,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:31:09,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731880307] [2020-10-12 09:31:09,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:31:09,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:09,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:31:09,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:31:09,870 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2020-10-12 09:31:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:10,150 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-12 09:31:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:31:10,151 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-12 09:31:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:10,152 INFO L225 Difference]: With dead ends: 43 [2020-10-12 09:31:10,153 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 09:31:10,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:31:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 09:31:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-12 09:31:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 09:31:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-12 09:31:10,167 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 19 [2020-10-12 09:31:10,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:10,168 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-12 09:31:10,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:31:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-12 09:31:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 09:31:10,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:10,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:10,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:31:10,171 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:10,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:10,172 INFO L82 PathProgramCache]: Analyzing trace with hash 443111142, now seen corresponding path program 3 times [2020-10-12 09:31:10,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:10,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944621771] [2020-10-12 09:31:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:10,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:10,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:10,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:11,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:11,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 09:31:11,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:31:11,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 866 [2020-10-12 09:31:11,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:11,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:31:11,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:11,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:31:11,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:11,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:11,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:11,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:11,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:11,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:11,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:11,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:11,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:11,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:11,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:11,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:11,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944621771] [2020-10-12 09:31:11,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:11,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:31:11,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322425688] [2020-10-12 09:31:11,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:31:11,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:11,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:31:11,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:31:11,474 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 12 states. [2020-10-12 09:31:12,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:12,104 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-12 09:31:12,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:31:12,105 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-12 09:31:12,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:12,109 INFO L225 Difference]: With dead ends: 57 [2020-10-12 09:31:12,109 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 09:31:12,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:31:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 09:31:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2020-10-12 09:31:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 09:31:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-12 09:31:12,121 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2020-10-12 09:31:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:12,121 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-12 09:31:12,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:31:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-12 09:31:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 09:31:12,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:12,123 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:12,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:31:12,123 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:12,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2014961855, now seen corresponding path program 4 times [2020-10-12 09:31:12,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:12,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753153735] [2020-10-12 09:31:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:12,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:12,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:12,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:12,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:13,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:13,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 09:31:13,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:31:13,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 993 [2020-10-12 09:31:13,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:13,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:31:13,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:13,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 09:31:13,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:13,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:13,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:13,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:13,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:13,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:13,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:13,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:13,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:13,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:13,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:13,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:13,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753153735] [2020-10-12 09:31:13,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:13,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:31:13,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711699973] [2020-10-12 09:31:13,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:31:13,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:13,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:31:13,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:31:13,460 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 14 states. [2020-10-12 09:31:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:13,911 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-10-12 09:31:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:31:13,912 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-12 09:31:13,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:13,913 INFO L225 Difference]: With dead ends: 67 [2020-10-12 09:31:13,913 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 09:31:13,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:31:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 09:31:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2020-10-12 09:31:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 09:31:13,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-12 09:31:13,925 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 25 [2020-10-12 09:31:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:13,925 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-12 09:31:13,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:31:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-12 09:31:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:31:13,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:13,926 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:13,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:31:13,927 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:13,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1470512086, now seen corresponding path program 1 times [2020-10-12 09:31:13,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:13,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779550873] [2020-10-12 09:31:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:13,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:13,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:14,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:14,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:31:14,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:31:14,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-12 09:31:14,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:31:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:31:14,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:14,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:14,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:14,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:14,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:14,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:14,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:14,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:14,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:14,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:14,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:14,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:14,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:31:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:14,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:14,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:14,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:14,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:14,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:14,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:14,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:14,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:14,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:14,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:14,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779550873] [2020-10-12 09:31:14,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:14,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:31:14,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757104822] [2020-10-12 09:31:14,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:31:14,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:14,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:31:14,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:31:14,259 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 8 states. [2020-10-12 09:31:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:14,370 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-12 09:31:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:31:14,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-12 09:31:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:14,374 INFO L225 Difference]: With dead ends: 57 [2020-10-12 09:31:14,374 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 09:31:14,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:31:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 09:31:14,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 09:31:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 09:31:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-12 09:31:14,391 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2020-10-12 09:31:14,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:14,393 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-12 09:31:14,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:31:14,393 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-12 09:31:14,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 09:31:14,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:14,396 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:14,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:31:14,397 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash 991124550, now seen corresponding path program 5 times [2020-10-12 09:31:14,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:14,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359978283] [2020-10-12 09:31:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:14,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:14,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:14,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:15,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:15,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:15,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:15,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:31:15,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:31:15,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1290 [2020-10-12 09:31:15,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:15,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:31:15,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:15,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:31:15,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:16,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:16,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:16,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:16,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:16,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:16,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:16,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:16,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:16,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:16,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:16,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:16,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359978283] [2020-10-12 09:31:16,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:16,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:31:16,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353258566] [2020-10-12 09:31:16,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:31:16,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:16,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:31:16,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:31:16,107 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 17 states. [2020-10-12 09:31:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:16,708 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-12 09:31:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:31:16,709 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-12 09:31:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:16,710 INFO L225 Difference]: With dead ends: 62 [2020-10-12 09:31:16,710 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 09:31:16,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:31:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 09:31:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2020-10-12 09:31:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 09:31:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-12 09:31:16,726 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2020-10-12 09:31:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:16,726 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-12 09:31:16,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:31:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-12 09:31:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 09:31:16,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:16,735 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:16,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:31:16,735 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:16,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1110372765, now seen corresponding path program 2 times [2020-10-12 09:31:16,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:16,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897819879] [2020-10-12 09:31:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:16,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:16,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:17,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:17,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 09:31:17,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:31:17,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-12 09:31:17,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:17,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:31:17,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:17,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:31:17,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:31:17,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:17,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:17,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:17,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:17,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:17,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:17,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:17,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:17,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:17,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:17,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:31:17,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 09:31:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:17,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:17,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:17,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:17,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 09:31:17,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:17,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:31:17,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:17,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:31:17,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:17,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897819879] [2020-10-12 09:31:17,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:17,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:31:17,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778544869] [2020-10-12 09:31:17,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:31:17,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:17,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:31:17,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:31:17,759 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 16 states. [2020-10-12 09:31:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:18,260 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-12 09:31:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:31:18,260 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-12 09:31:18,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:18,262 INFO L225 Difference]: With dead ends: 54 [2020-10-12 09:31:18,262 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 09:31:18,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:31:18,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 09:31:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-10-12 09:31:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 09:31:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-12 09:31:18,274 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 30 [2020-10-12 09:31:18,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:18,275 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-12 09:31:18,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:31:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-12 09:31:18,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 09:31:18,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:18,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:18,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:31:18,277 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:18,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:18,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1028166262, now seen corresponding path program 3 times [2020-10-12 09:31:18,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:18,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128242488] [2020-10-12 09:31:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:18,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:18,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:18,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:18,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:18,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:18,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:19,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:19,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 09:31:19,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:31:19,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1431 [2020-10-12 09:31:19,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:31:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 09:31:19,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:20,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:20,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:20,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:20,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:20,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:20,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:20,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:20,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:20,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:20,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 09:31:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:20,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:20,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:20,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:20,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 09:31:20,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:31:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:31:20,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:20,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128242488] [2020-10-12 09:31:20,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:20,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:31:20,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953573352] [2020-10-12 09:31:20,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:31:20,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:20,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:31:20,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:31:20,204 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 19 states. [2020-10-12 09:31:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:21,273 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-10-12 09:31:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:31:21,273 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2020-10-12 09:31:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:21,274 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:31:21,275 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 09:31:21,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:31:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 09:31:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2020-10-12 09:31:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 09:31:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-12 09:31:21,290 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 33 [2020-10-12 09:31:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:21,290 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-12 09:31:21,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:31:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-12 09:31:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:31:21,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:21,292 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:21,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:31:21,292 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash 145594109, now seen corresponding path program 4 times [2020-10-12 09:31:21,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:21,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288553642] [2020-10-12 09:31:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:21,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:21,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:21,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:21,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:22,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:22,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:22,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:22,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:22,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:23,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:23,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:23,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:31:23,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 09:31:23,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2518 [2020-10-12 09:31:23,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:23,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:31:23,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 09:31:23,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:31:23,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:24,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:24,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:24,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:24,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:24,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:24,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:24,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:24,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:24,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:24,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:31:24,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:24,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 09:31:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:24,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:24,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:24,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:24,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:24,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 09:31:24,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:24,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:31:24,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:24,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:31:24,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:24,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288553642] [2020-10-12 09:31:24,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:24,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:31:24,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704237744] [2020-10-12 09:31:24,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:31:24,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:24,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:31:24,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:31:24,599 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 21 states. [2020-10-12 09:31:25,106 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-12 09:31:25,578 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-12 09:31:25,921 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-12 09:31:26,763 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-12 09:31:27,131 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-12 09:31:27,283 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-12 09:31:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:27,592 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2020-10-12 09:31:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:31:27,592 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-10-12 09:31:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:27,593 INFO L225 Difference]: With dead ends: 105 [2020-10-12 09:31:27,594 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 09:31:27,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=380, Invalid=1782, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:31:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 09:31:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-12 09:31:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 09:31:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-12 09:31:27,617 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 36 [2020-10-12 09:31:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:27,617 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-12 09:31:27,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:31:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-12 09:31:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:31:27,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:27,618 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:27,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:31:27,619 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:27,619 INFO L82 PathProgramCache]: Analyzing trace with hash -56236716, now seen corresponding path program 5 times [2020-10-12 09:31:27,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:27,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869490424] [2020-10-12 09:31:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:27,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:27,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:27,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:27,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 09:31:27,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:31:27,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-12 09:31:27,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:31:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 09:31:27,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:27,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:27,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:27,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:27,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:27,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:27,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:27,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:27,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:27,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:27,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:27,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:27,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 09:31:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:27,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:27,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:27,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:27,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:27,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:27,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:27,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:27,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:27,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 09:31:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:27,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:28,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:28,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:28,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:28,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:28,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:28,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:31:28,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869490424] [2020-10-12 09:31:28,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:28,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:31:28,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045244505] [2020-10-12 09:31:28,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:31:28,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:28,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:31:28,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:31:28,015 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 10 states. [2020-10-12 09:31:28,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:28,166 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-10-12 09:31:28,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:31:28,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-12 09:31:28,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:28,169 INFO L225 Difference]: With dead ends: 82 [2020-10-12 09:31:28,169 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 09:31:28,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:31:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 09:31:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-12 09:31:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 09:31:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-12 09:31:28,190 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 38 [2020-10-12 09:31:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:28,190 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-12 09:31:28,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:31:28,190 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-12 09:31:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:31:28,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:28,192 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] [2020-10-12 09:31:28,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:31:28,192 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:28,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:28,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1785920669, now seen corresponding path program 1 times [2020-10-12 09:31:28,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:28,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759060817] [2020-10-12 09:31:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:28,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:28,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:28,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:28,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:28,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:29,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:29,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:29,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:30,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:30,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:31:30,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:31:30,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2049 [2020-10-12 09:31:30,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:31:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:31:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:30,580 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2020-10-12 09:31:31,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:31,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:31,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:31,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:31,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:31,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:31:31,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:31,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:31,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:31,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:31,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:31,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 09:31:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:31,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:31,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:31,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:31,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:31,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 09:31:31,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:31,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:31:31,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:31,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:31:31,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:31:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:31:31,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759060817] [2020-10-12 09:31:31,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:31,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:31:31,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187500791] [2020-10-12 09:31:31,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:31:31,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:31,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:31:31,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:31:31,153 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 20 states. [2020-10-12 09:31:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:32,270 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-12 09:31:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:31:32,271 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-12 09:31:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:32,273 INFO L225 Difference]: With dead ends: 72 [2020-10-12 09:31:32,273 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 09:31:32,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:31:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 09:31:32,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2020-10-12 09:31:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 09:31:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-12 09:31:32,294 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 37 [2020-10-12 09:31:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:32,294 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-12 09:31:32,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:31:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-12 09:31:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:31:32,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:32,297 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:32,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:31:32,298 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:32,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:32,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1109499181, now seen corresponding path program 6 times [2020-10-12 09:31:32,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:32,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695459288] [2020-10-12 09:31:32,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:32,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:32,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:34,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:34,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 09:31:34,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:31:34,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2579 [2020-10-12 09:31:34,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:34,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:31:34,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:34,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 09:31:34,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:35,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:35,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:35,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:35,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:35,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:35,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:35,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:35,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:35,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:35,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:35,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:35,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 09:31:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:35,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:35,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:35,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:35,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:35,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:31:35,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:35,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:31:35,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:35,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:31:35,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:35,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 09:31:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:35,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:35,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:35,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:35,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:35,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:31:35,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:35,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:35,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:31:35,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695459288] [2020-10-12 09:31:35,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:35,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:31:35,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095784511] [2020-10-12 09:31:35,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:31:35,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:35,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:31:35,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:31:35,228 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 20 states. [2020-10-12 09:31:36,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:36,145 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-10-12 09:31:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:31:36,146 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-12 09:31:36,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:36,147 INFO L225 Difference]: With dead ends: 73 [2020-10-12 09:31:36,147 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 09:31:36,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:31:36,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 09:31:36,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-12 09:31:36,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 09:31:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-10-12 09:31:36,171 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 41 [2020-10-12 09:31:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:36,172 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-10-12 09:31:36,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:31:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-10-12 09:31:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 09:31:36,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:36,173 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:36,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:31:36,174 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:36,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:36,174 INFO L82 PathProgramCache]: Analyzing trace with hash 442051252, now seen corresponding path program 7 times [2020-10-12 09:31:36,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:36,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035723631] [2020-10-12 09:31:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:36,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:36,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:36,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:36,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:36,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:36,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:37,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:37,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:38,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:40,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:40,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 09:31:40,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 09:31:40,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4430 [2020-10-12 09:31:40,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:40,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:31:40,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:40,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:31:40,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:41,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:41,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:41,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:41,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:41,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:41,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:41,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:41,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:41,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 09:31:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:41,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:41,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:41,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:41,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:41,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:31:41,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:41,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:31:41,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:41,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:31:41,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:41,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 09:31:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:41,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:41,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:41,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:41,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:41,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:31:41,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:41,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:31:41,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:41,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:31:41,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:31:41,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035723631] [2020-10-12 09:31:41,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:41,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:31:41,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072213617] [2020-10-12 09:31:41,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:31:41,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:41,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:31:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:31:41,291 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 22 states. [2020-10-12 09:31:42,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:42,700 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2020-10-12 09:31:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:31:42,701 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2020-10-12 09:31:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:42,702 INFO L225 Difference]: With dead ends: 95 [2020-10-12 09:31:42,702 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 09:31:42,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:31:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 09:31:42,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2020-10-12 09:31:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 09:31:42,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-12 09:31:42,720 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 44 [2020-10-12 09:31:42,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:42,721 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-12 09:31:42,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:31:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-12 09:31:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:31:42,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:42,722 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:42,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:31:42,722 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:42,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2095588403, now seen corresponding path program 8 times [2020-10-12 09:31:42,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:42,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315133963] [2020-10-12 09:31:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:42,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:42,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:42,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:42,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:43,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:43,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:43,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:43,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:43,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:44,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:44,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:44,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:44,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:44,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:44,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:46,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:46,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:47,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 09:31:47,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 09:31:47,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4339 [2020-10-12 09:31:47,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:47,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:31:47,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 09:31:47,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 09:31:47,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:47,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:47,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:47,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:47,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:47,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:47,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:47,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:31:47,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:47,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 09:31:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:47,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:47,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:47,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:47,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:31:47,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:47,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:31:47,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:31:47,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:47,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 09:31:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:47,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:47,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:47,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:47,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:47,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:31:47,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:47,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:31:47,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:47,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:31:47,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:31:48,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315133963] [2020-10-12 09:31:48,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:48,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:31:48,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395040800] [2020-10-12 09:31:48,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:31:48,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:48,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:31:48,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:31:48,023 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 26 states. [2020-10-12 09:31:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:51,791 INFO L93 Difference]: Finished difference Result 129 states and 151 transitions. [2020-10-12 09:31:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 09:31:51,791 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 47 [2020-10-12 09:31:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:51,794 INFO L225 Difference]: With dead ends: 129 [2020-10-12 09:31:51,794 INFO L226 Difference]: Without dead ends: 127 [2020-10-12 09:31:51,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=665, Invalid=3757, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 09:31:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-12 09:31:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 77. [2020-10-12 09:31:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 09:31:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-10-12 09:31:51,815 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2020-10-12 09:31:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:51,815 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-10-12 09:31:51,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:31:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-10-12 09:31:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:31:51,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:51,816 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:51,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:31:51,817 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash 121372900, now seen corresponding path program 9 times [2020-10-12 09:31:51,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:51,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073733504] [2020-10-12 09:31:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:51,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:51,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:52,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:31:52,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:31:52,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-12 09:31:52,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:31:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:31:52,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:52,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:52,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:52,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:52,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:52,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:52,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:52,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:52,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:52,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:52,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:52,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 09:31:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:52,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:52,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:52,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:52,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:52,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:52,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:52,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:52,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:52,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:52,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 09:31:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:52,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:52,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:52,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:52,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:52,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:52,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:52,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:52,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:52,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:52,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-12 09:31:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:52,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:52,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:52,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:52,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:52,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:52,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:31:52,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:52,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:31:52,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 09:31:52,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073733504] [2020-10-12 09:31:52,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:52,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:31:52,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875476723] [2020-10-12 09:31:52,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:31:52,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:31:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:31:52,135 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 12 states. [2020-10-12 09:31:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:52,338 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-10-12 09:31:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:31:52,338 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-12 09:31:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:52,339 INFO L225 Difference]: With dead ends: 90 [2020-10-12 09:31:52,340 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 09:31:52,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:31:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 09:31:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 09:31:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 09:31:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-12 09:31:52,354 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 49 [2020-10-12 09:31:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:52,354 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-12 09:31:52,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:31:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-12 09:31:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 09:31:52,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:52,355 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] [2020-10-12 09:31:52,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:31:52,356 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:52,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1086743131, now seen corresponding path program 2 times [2020-10-12 09:31:52,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:52,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505421682] [2020-10-12 09:31:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:52,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:52,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:53,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:53,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:53,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:53,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:53,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:54,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:55,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:56,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:56,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:31:56,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 09:31:56,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4319 [2020-10-12 09:31:56,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:56,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:31:56,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:31:56,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:31:56,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:57,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:31:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:57,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:57,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:57,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:31:57,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:57,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:31:57,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:57,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:31:57,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:57,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:31:57,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:57,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 09:31:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:57,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:57,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:57,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:57,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:57,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 09:31:57,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:31:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:31:57,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:57,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 09:31:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:57,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:57,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:31:57,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:31:57,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:31:57,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:31:57,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:31:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:31:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:31:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:31:57,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:31:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:31:57,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505421682] [2020-10-12 09:31:57,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:31:57,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:31:57,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434279754] [2020-10-12 09:31:57,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:31:57,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:31:57,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:31:57,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:31:57,472 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 24 states. [2020-10-12 09:31:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:31:59,556 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2020-10-12 09:31:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:31:59,557 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 48 [2020-10-12 09:31:59,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:31:59,558 INFO L225 Difference]: With dead ends: 103 [2020-10-12 09:31:59,558 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 09:31:59,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=242, Invalid=2208, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:31:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 09:31:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 59. [2020-10-12 09:31:59,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 09:31:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-12 09:31:59,569 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 48 [2020-10-12 09:31:59,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:31:59,570 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-12 09:31:59,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:31:59,570 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-12 09:31:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 09:31:59,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:31:59,570 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:31:59,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:31:59,571 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:31:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:31:59,571 INFO L82 PathProgramCache]: Analyzing trace with hash -904206316, now seen corresponding path program 10 times [2020-10-12 09:31:59,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:31:59,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096402701] [2020-10-12 09:31:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:31:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:31:59,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:59,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:59,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:31:59,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:00,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:00,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:00,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:00,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:02,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:02,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:02,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:02,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:04,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:04,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:04,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 09:32:04,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 09:32:04,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:32:04,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:04,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:32:04,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 09:32:04,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:32:04,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:32:05,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:05,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:05,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:05,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:05,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:05,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:05,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:32:05,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:05,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:32:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:05,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:05,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:05,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:05,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:05,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:32:05,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:05,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:05,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:05,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:05,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:05,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 09:32:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:05,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:05,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:05,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:05,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:05,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:32:05,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:05,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:05,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:05,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:05,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:32:05,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096402701] [2020-10-12 09:32:05,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:05,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:32:05,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184195236] [2020-10-12 09:32:05,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:32:05,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:05,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:32:05,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:32:05,788 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 29 states. [2020-10-12 09:32:06,614 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-12 09:32:07,333 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-12 09:32:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:10,361 INFO L93 Difference]: Finished difference Result 137 states and 163 transitions. [2020-10-12 09:32:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 09:32:10,362 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 50 [2020-10-12 09:32:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:10,364 INFO L225 Difference]: With dead ends: 137 [2020-10-12 09:32:10,364 INFO L226 Difference]: Without dead ends: 135 [2020-10-12 09:32:10,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=743, Invalid=4369, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 09:32:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-12 09:32:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-10-12 09:32:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 09:32:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-12 09:32:10,382 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 50 [2020-10-12 09:32:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:10,382 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-12 09:32:10,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:32:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-12 09:32:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:32:10,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:10,383 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:10,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:32:10,384 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:10,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:10,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1716709525, now seen corresponding path program 11 times [2020-10-12 09:32:10,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:10,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950245088] [2020-10-12 09:32:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:10,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:10,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:10,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:10,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:15,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:15,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 09:32:15,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:32:15,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:32:15,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:15,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:32:15,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:32:15,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:32:15,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:15,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:15,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:15,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:15,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:15,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:15,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:15,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:15,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:15,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:15,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:15,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:15,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 09:32:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:15,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:15,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:15,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:15,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:15,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:32:15,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:15,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:15,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:15,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:15,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:15,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 09:32:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:15,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:15,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:15,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:15,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:15,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:15,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:15,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:15,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 09:32:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:15,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:15,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:15,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:15,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:15,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:15,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:15,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:32:15,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950245088] [2020-10-12 09:32:15,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:15,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:32:15,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566287093] [2020-10-12 09:32:15,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:32:15,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:15,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:32:15,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:32:15,902 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 22 states. [2020-10-12 09:32:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:16,974 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-10-12 09:32:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:32:16,975 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-12 09:32:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:16,976 INFO L225 Difference]: With dead ends: 94 [2020-10-12 09:32:16,976 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 09:32:16,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:32:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 09:32:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2020-10-12 09:32:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 09:32:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2020-10-12 09:32:16,993 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 52 [2020-10-12 09:32:16,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:16,993 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2020-10-12 09:32:16,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:32:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2020-10-12 09:32:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 09:32:16,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:16,993 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] [2020-10-12 09:32:16,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:32:16,994 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:16,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:16,994 INFO L82 PathProgramCache]: Analyzing trace with hash -635117836, now seen corresponding path program 3 times [2020-10-12 09:32:16,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:16,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160751763] [2020-10-12 09:32:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:17,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:17,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:17,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:17,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:17,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:17,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:18,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:18,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:18,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:18,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:18,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:18,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:18,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:19,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:19,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:19,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:19,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:19,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:20,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:20,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:32:20,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-12 09:32:20,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3886 [2020-10-12 09:32:20,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:20,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:32:20,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:32:20,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 09:32:20,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:21,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:21,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:21,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:21,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:21,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:21,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:21,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:21,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:21,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:21,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:21,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:21,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 09:32:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:21,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:21,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:21,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:21,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:21,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:21,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:21,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:21,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:21,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:21,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:21,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 09:32:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:21,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:21,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:21,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:21,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:21,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:32:21,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:21,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:21,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:21,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:21,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:32:21,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160751763] [2020-10-12 09:32:21,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:21,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:32:21,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242949145] [2020-10-12 09:32:21,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:32:21,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:21,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:32:21,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:32:21,970 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand 27 states. [2020-10-12 09:32:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:25,308 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2020-10-12 09:32:25,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:32:25,311 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-10-12 09:32:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:25,312 INFO L225 Difference]: With dead ends: 98 [2020-10-12 09:32:25,312 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 09:32:25,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:32:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 09:32:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-10-12 09:32:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 09:32:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2020-10-12 09:32:25,336 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 51 [2020-10-12 09:32:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:25,336 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2020-10-12 09:32:25,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:32:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2020-10-12 09:32:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:32:25,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:25,338 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:25,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:32:25,338 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:25,338 INFO L82 PathProgramCache]: Analyzing trace with hash 802791300, now seen corresponding path program 12 times [2020-10-12 09:32:25,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:25,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698019501] [2020-10-12 09:32:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:25,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:25,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:25,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:25,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:25,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:25,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:25,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:26,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:26,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:26,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:26,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:26,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:26,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:27,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:27,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:30,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:30,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:32:30,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 09:32:30,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:32:30,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:32:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:32:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 09:32:30,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:31,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:31,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:31,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:31,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:31,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:31,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:31,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:31,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:31,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:31,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:31,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:31,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 09:32:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:31,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:31,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:31,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:31,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:31,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:32:31,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:31,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:31,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 09:32:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:31,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:31,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:31,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:31,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:31,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:31,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:31,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:31,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:31,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:31,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:31,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 09:32:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:31,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:31,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:31,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:31,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:31,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:31,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:31,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:32:31,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698019501] [2020-10-12 09:32:31,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:31,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:32:31,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280359576] [2020-10-12 09:32:31,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:32:31,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:31,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:32:31,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:32:31,312 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 25 states. [2020-10-12 09:32:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:33,521 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2020-10-12 09:32:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:32:33,522 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-12 09:32:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:33,524 INFO L225 Difference]: With dead ends: 121 [2020-10-12 09:32:33,524 INFO L226 Difference]: Without dead ends: 119 [2020-10-12 09:32:33,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=215, Invalid=2137, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:32:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-12 09:32:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 84. [2020-10-12 09:32:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 09:32:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2020-10-12 09:32:33,541 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 55 [2020-10-12 09:32:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:33,542 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2020-10-12 09:32:33,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:32:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2020-10-12 09:32:33,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 09:32:33,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:33,543 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:33,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:32:33,543 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:33,543 INFO L82 PathProgramCache]: Analyzing trace with hash 403403979, now seen corresponding path program 13 times [2020-10-12 09:32:33,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:33,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298796148] [2020-10-12 09:32:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:33,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:33,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:33,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:34,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:34,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:34,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:36,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:37,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:37,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:38,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:38,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:38,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 09:32:38,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 09:32:38,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:32:38,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:38,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:32:38,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 09:32:38,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:32:38,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:39,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:39,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:39,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:39,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:39,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:39,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:32:39,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:39,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:39,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:39,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:32:39,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 09:32:39,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:32:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:39,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:39,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:39,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:39,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:39,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:39,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:39,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:39,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:39,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:39,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:39,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 09:32:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:39,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:39,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:39,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:39,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 09:32:39,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:39,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:39,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 09:32:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:39,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:39,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:39,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:39,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:39,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:32:39,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:39,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:39,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:39,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:39,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:32:39,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298796148] [2020-10-12 09:32:39,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:39,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:32:39,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501689899] [2020-10-12 09:32:39,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:32:39,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:39,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:32:39,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:32:39,837 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 28 states. [2020-10-12 09:32:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:42,636 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2020-10-12 09:32:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 09:32:42,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2020-10-12 09:32:42,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:42,640 INFO L225 Difference]: With dead ends: 140 [2020-10-12 09:32:42,640 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 09:32:42,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=446, Invalid=2746, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 09:32:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 09:32:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2020-10-12 09:32:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 09:32:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-12 09:32:42,660 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 58 [2020-10-12 09:32:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:42,660 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-12 09:32:42,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:32:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-12 09:32:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 09:32:42,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:42,661 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:42,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:32:42,662 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:42,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:42,662 INFO L82 PathProgramCache]: Analyzing trace with hash 692084002, now seen corresponding path program 14 times [2020-10-12 09:32:42,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:42,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205901805] [2020-10-12 09:32:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:42,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:42,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:42,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:42,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 09:32:42,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:32:42,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-12 09:32:42,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:42,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:32:42,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:32:42,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 09:32:42,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:43,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:43,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:43,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:43,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:43,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:43,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:43,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:43,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:43,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 09:32:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:43,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:43,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:43,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:43,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:43,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:43,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:43,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:43,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:43,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:32:43,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 09:32:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:43,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:43,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:43,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:43,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:43,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:43,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:43,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:32:43,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 09:32:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:43,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:43,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:43,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:43,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:43,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:43,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:43,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:43,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:32:43,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 09:32:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:43,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:43,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:43,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:43,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:43,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:43,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:43,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:43,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:43,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:43,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:32:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:32:43,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205901805] [2020-10-12 09:32:43,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:43,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:32:43,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759581771] [2020-10-12 09:32:43,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:32:43,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:43,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:32:43,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:32:43,129 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 14 states. [2020-10-12 09:32:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:43,565 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-10-12 09:32:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:32:43,566 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-12 09:32:43,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:43,568 INFO L225 Difference]: With dead ends: 101 [2020-10-12 09:32:43,568 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 09:32:43,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:32:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 09:32:43,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-12 09:32:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 09:32:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-10-12 09:32:43,602 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 60 [2020-10-12 09:32:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:43,603 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-10-12 09:32:43,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:32:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-10-12 09:32:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:32:43,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:43,604 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] [2020-10-12 09:32:43,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:32:43,605 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:43,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1918858325, now seen corresponding path program 4 times [2020-10-12 09:32:43,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:43,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787168002] [2020-10-12 09:32:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:43,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:43,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:44,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:44,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:44,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:45,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:45,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:45,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:45,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:45,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:45,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:46,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:46,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:46,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:46,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:46,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:46,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:48,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:48,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 09:32:48,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 09:32:48,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:32:48,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:48,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:32:48,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:32:48,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 09:32:48,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:49,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:49,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:49,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:49,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:49,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:49,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:49,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:49,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:49,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 09:32:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:49,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:49,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:49,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:49,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:49,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:32:49,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:49,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:49,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:49,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:49,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:49,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 09:32:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:49,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:49,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:49,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:49,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:49,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:49,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:49,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:49,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 09:32:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:49,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:49,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:49,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:49,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:49,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:49,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:49,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 5 proven. 103 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 09:32:49,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787168002] [2020-10-12 09:32:49,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:49,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:32:49,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673544508] [2020-10-12 09:32:49,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:32:49,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:49,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:32:49,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:32:49,906 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 29 states. [2020-10-12 09:32:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:32:52,985 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2020-10-12 09:32:52,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 09:32:52,985 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2020-10-12 09:32:52,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:32:52,987 INFO L225 Difference]: With dead ends: 128 [2020-10-12 09:32:52,987 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 09:32:52,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=295, Invalid=3245, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 09:32:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 09:32:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 93. [2020-10-12 09:32:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 09:32:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2020-10-12 09:32:53,025 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 59 [2020-10-12 09:32:53,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:32:53,026 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2020-10-12 09:32:53,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:32:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2020-10-12 09:32:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 09:32:53,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:32:53,027 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:32:53,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:32:53,027 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:32:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:32:53,028 INFO L82 PathProgramCache]: Analyzing trace with hash -684866012, now seen corresponding path program 15 times [2020-10-12 09:32:53,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:32:53,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146404669] [2020-10-12 09:32:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:32:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:53,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:53,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:53,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:53,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:53,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:53,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:54,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:54,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:57,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:57,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:58,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:58,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:32:58,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 09:32:58,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 09:32:58,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:58,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:32:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:32:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 09:32:58,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:32:59,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:32:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:59,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:59,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:59,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:32:59,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:59,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:32:59,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:59,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:32:59,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:59,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:32:59,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:59,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 09:32:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:59,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:59,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:59,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:59,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:32:59,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:59,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:59,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:59,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:59,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:59,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 09:32:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:59,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:59,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:59,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:59,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:59,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:32:59,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:32:59,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:59,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:32:59,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:59,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 09:32:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:32:59,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:32:59,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:32:59,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:32:59,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:32:59,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:32:59,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:32:59,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:32:59,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:32:59,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:32:59,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:32:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 4 proven. 118 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:32:59,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146404669] [2020-10-12 09:32:59,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:32:59,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:32:59,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617844706] [2020-10-12 09:32:59,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:32:59,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:32:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:32:59,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=804, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:32:59,704 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand 30 states. [2020-10-12 09:33:00,531 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-12 09:33:03,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:03,691 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2020-10-12 09:33:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:33:03,693 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 61 [2020-10-12 09:33:03,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:03,695 INFO L225 Difference]: With dead ends: 126 [2020-10-12 09:33:03,695 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 09:33:03,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=318, Invalid=2652, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 09:33:03,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 09:33:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 81. [2020-10-12 09:33:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 09:33:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-10-12 09:33:03,717 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 61 [2020-10-12 09:33:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:03,717 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-10-12 09:33:03,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:33:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-10-12 09:33:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 09:33:03,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:03,718 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:03,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:33:03,718 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:03,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:03,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1458324421, now seen corresponding path program 16 times [2020-10-12 09:33:03,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:03,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998510303] [2020-10-12 09:33:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:03,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:03,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:03,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:03,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:04,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:07,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:08,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:08,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 09:33:08,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:33:08,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:33:08,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:08,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:33:08,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:33:08,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 09:33:08,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:09,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:09,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:09,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:09,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:09,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:09,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:09,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:09,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:09,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:09,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:09,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:09,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 09:33:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:09,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:09,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:09,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:09,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:09,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:33:09,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:33:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:33:09,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:09,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 09:33:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:09,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:09,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:09,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:09,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:09,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:09,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:09,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:09,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:09,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:09,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:33:09,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 09:33:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:09,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:09,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:09,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:09,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:09,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:09,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:09,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:09,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:09,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:09,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:09,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 09:33:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:09,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:09,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:09,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:09,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:09,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:09,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:09,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:09,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:09,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:09,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:33:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 93 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 09:33:09,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998510303] [2020-10-12 09:33:09,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:09,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:33:09,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041860769] [2020-10-12 09:33:09,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:33:09,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:09,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:33:09,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:33:09,576 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 25 states. [2020-10-12 09:33:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:11,227 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2020-10-12 09:33:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:33:11,228 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-12 09:33:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:11,229 INFO L225 Difference]: With dead ends: 110 [2020-10-12 09:33:11,229 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 09:33:11,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:33:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 09:33:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2020-10-12 09:33:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 09:33:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-10-12 09:33:11,254 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 63 [2020-10-12 09:33:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:11,254 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-10-12 09:33:11,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:33:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-10-12 09:33:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 09:33:11,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:11,255 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:11,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:33:11,256 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:11,256 INFO L82 PathProgramCache]: Analyzing trace with hash -543466878, now seen corresponding path program 17 times [2020-10-12 09:33:11,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:11,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995747315] [2020-10-12 09:33:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:11,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:11,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:11,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:11,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:11,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:11,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:12,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:12,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:12,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:12,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:12,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:13,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:13,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:14,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:14,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:14,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:16,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:16,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 09:33:16,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 09:33:16,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:33:16,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:16,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:33:16,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:33:16,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 09:33:16,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:17,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:17,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:17,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:17,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:17,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:17,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:33:17,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:17,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:17,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:17,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:17,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:17,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:33:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:17,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:17,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:17,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:17,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:17,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:17,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:17,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:33:17,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:17,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:33:17,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:17,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 09:33:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:17,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:17,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:17,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:17,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:17,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:17,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:17,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:17,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 09:33:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:17,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:17,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:17,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:17,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:17,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:17,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:17,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:33:17,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:17,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:33:17,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:17,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 09:33:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:17,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:17,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:17,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:17,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:17,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:17,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:17,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:17,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:17,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 10 proven. 113 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 09:33:17,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995747315] [2020-10-12 09:33:17,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:17,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:33:17,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433273757] [2020-10-12 09:33:17,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:33:17,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:17,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:33:17,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:33:17,800 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 29 states. [2020-10-12 09:33:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:20,559 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2020-10-12 09:33:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:33:20,560 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-12 09:33:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:20,561 INFO L225 Difference]: With dead ends: 138 [2020-10-12 09:33:20,562 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 09:33:20,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=221, Invalid=2535, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:33:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 09:33:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2020-10-12 09:33:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 09:33:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2020-10-12 09:33:20,590 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 66 [2020-10-12 09:33:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:20,590 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2020-10-12 09:33:20,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:33:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2020-10-12 09:33:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 09:33:20,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:20,592 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:20,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:33:20,592 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:20,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1884863781, now seen corresponding path program 18 times [2020-10-12 09:33:20,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:20,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504952368] [2020-10-12 09:33:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:20,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:20,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:20,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:20,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:20,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:21,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:21,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:22,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:23,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:23,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:24,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:25,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:25,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 09:33:25,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 09:33:25,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:33:25,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:25,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:33:25,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 09:33:25,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 09:33:25,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:27,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:27,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:27,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:27,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:27,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:27,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:27,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:27,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:27,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:27,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:33:27,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:27,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 09:33:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:27,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:27,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:27,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:27,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:27,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:27,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:33:27,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:27,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:33:27,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:27,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 09:33:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:27,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:27,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:27,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:27,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:27,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:33:27,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:27,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:33:27,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:27,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:33:27,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:27,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 09:33:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:27,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:27,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:27,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:27,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:27,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:27,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:27,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:27,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:27,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:27,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:27,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 09:33:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:27,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:27,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:27,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:27,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:27,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 6 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 09:33:27,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504952368] [2020-10-12 09:33:27,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:27,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:33:27,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152149801] [2020-10-12 09:33:27,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:33:27,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:27,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:33:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:33:27,529 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 32 states. [2020-10-12 09:33:30,710 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-12 09:33:31,599 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-12 09:33:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:32,402 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2020-10-12 09:33:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 09:33:32,403 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 69 [2020-10-12 09:33:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:32,405 INFO L225 Difference]: With dead ends: 180 [2020-10-12 09:33:32,405 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 09:33:32,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=617, Invalid=4213, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 09:33:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 09:33:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 103. [2020-10-12 09:33:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 09:33:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2020-10-12 09:33:32,438 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 69 [2020-10-12 09:33:32,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:32,438 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2020-10-12 09:33:32,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:33:32,438 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2020-10-12 09:33:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 09:33:32,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:32,439 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:32,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:33:32,440 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:32,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1050856974, now seen corresponding path program 19 times [2020-10-12 09:33:32,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:32,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303360087] [2020-10-12 09:33:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:32,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:32,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:32,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:32,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 09:33:32,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:33:32,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-12 09:33:32,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:33:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:33:32,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 09:33:32,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:32,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:32,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:32,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:32,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:32,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:32,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:32,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:32,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:32,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:32,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:32,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:32,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 09:33:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:32,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:32,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:32,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:32,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:32,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:32,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:32,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:32,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:32,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:32,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:32,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 09:33:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:32,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:32,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:32,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:32,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:32,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:32,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:32,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:32,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 09:33:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:32,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:32,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:32,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:32,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:32,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:32,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:32,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:32,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:32,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:32,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:32,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 09:33:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:32,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:32,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:32,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:32,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:32,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:32,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:32,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:32,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:32,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:32,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:32,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-12 09:33:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:32,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:32,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:32,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:32,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:32,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:32,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:32,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:32,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:32,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:32,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 43 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-12 09:33:32,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303360087] [2020-10-12 09:33:32,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:32,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:33:32,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497395655] [2020-10-12 09:33:32,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:33:32,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:33:32,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:33:32,929 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand 16 states. [2020-10-12 09:33:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:33,307 INFO L93 Difference]: Finished difference Result 135 states and 156 transitions. [2020-10-12 09:33:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:33:33,309 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-12 09:33:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:33,310 INFO L225 Difference]: With dead ends: 135 [2020-10-12 09:33:33,310 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 09:33:33,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:33:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 09:33:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-12 09:33:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 09:33:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2020-10-12 09:33:33,343 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 71 [2020-10-12 09:33:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:33,344 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2020-10-12 09:33:33,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:33:33,344 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2020-10-12 09:33:33,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 09:33:33,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:33,346 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] [2020-10-12 09:33:33,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:33:33,346 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:33,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:33,347 INFO L82 PathProgramCache]: Analyzing trace with hash -552815575, now seen corresponding path program 5 times [2020-10-12 09:33:33,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:33,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435771759] [2020-10-12 09:33:33,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:33,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:33,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:33,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:33,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:34,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:34,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:34,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:34,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:35,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:35,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:35,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:36,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:36,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:37,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:37,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:38,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:38,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 09:33:38,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 09:33:38,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:33:38,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:38,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:33:38,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:33:38,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 09:33:38,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:39,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:39,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:39,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:39,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:39,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:39,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:39,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:33:39,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:39,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:33:39,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 09:33:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:39,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:39,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:39,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:39,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:39,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:39,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:39,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:39,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 09:33:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:39,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:39,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:39,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:39,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:39,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:33:39,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:39,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:33:39,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:39,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:33:39,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 09:33:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:39,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:39,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:39,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:39,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:39,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:39,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:39,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:33:39,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:39,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:33:39,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-12 09:33:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:39,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:39,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:39,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:39,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:39,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:33:39,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:39,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:39,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:39,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:39,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 12 proven. 140 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 09:33:39,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435771759] [2020-10-12 09:33:39,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:39,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:33:39,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785550566] [2020-10-12 09:33:39,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:33:39,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:39,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:33:39,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=752, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:33:39,875 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 29 states. [2020-10-12 09:33:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:44,103 INFO L93 Difference]: Finished difference Result 160 states and 187 transitions. [2020-10-12 09:33:44,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 09:33:44,104 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2020-10-12 09:33:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:44,105 INFO L225 Difference]: With dead ends: 160 [2020-10-12 09:33:44,105 INFO L226 Difference]: Without dead ends: 158 [2020-10-12 09:33:44,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=315, Invalid=3717, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 09:33:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-12 09:33:44,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 104. [2020-10-12 09:33:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 09:33:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2020-10-12 09:33:44,144 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 70 [2020-10-12 09:33:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:44,144 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2020-10-12 09:33:44,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:33:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2020-10-12 09:33:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 09:33:44,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:44,146 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:44,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:33:44,146 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:44,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:44,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1230688226, now seen corresponding path program 20 times [2020-10-12 09:33:44,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:44,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52340285] [2020-10-12 09:33:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:44,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:44,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:44,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:44,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:44,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:45,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:45,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:46,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:46,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:47,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:47,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:49,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:49,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 09:33:49,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 09:33:49,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:33:49,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:49,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:33:49,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 09:33:49,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 09:33:49,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:50,041 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-12 09:33:51,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:33:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:51,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:51,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:51,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:33:51,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:51,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:51,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:51,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:51,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:51,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:33:51,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:51,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 09:33:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:51,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:51,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:51,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:51,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:51,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:33:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:33:51,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:51,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 09:33:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:51,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:51,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:51,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:51,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:51,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:51,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:51,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:51,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:51,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:51,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:51,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 09:33:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:51,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:51,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:51,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:51,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:51,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:33:51,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:51,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:33:51,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:51,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:33:51,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:51,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 09:33:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:51,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:51,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:33:51,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:33:51,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:33:51,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:33:51,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:33:51,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:33:51,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:33:51,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:33:51,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:33:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 9 proven. 160 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 09:33:51,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52340285] [2020-10-12 09:33:51,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:33:51,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:33:51,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142391371] [2020-10-12 09:33:51,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:33:51,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:33:51,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:33:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:33:51,450 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 34 states. [2020-10-12 09:33:52,527 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-12 09:33:53,902 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-12 09:33:55,016 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-12 09:33:57,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:33:57,647 INFO L93 Difference]: Finished difference Result 183 states and 217 transitions. [2020-10-12 09:33:57,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 09:33:57,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-12 09:33:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:33:57,650 INFO L225 Difference]: With dead ends: 183 [2020-10-12 09:33:57,650 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 09:33:57,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=681, Invalid=4869, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 09:33:57,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 09:33:57,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 106. [2020-10-12 09:33:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 09:33:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2020-10-12 09:33:57,683 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 72 [2020-10-12 09:33:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:33:57,683 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2020-10-12 09:33:57,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:33:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2020-10-12 09:33:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 09:33:57,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:33:57,696 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:33:57,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:33:57,696 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:33:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:33:57,697 INFO L82 PathProgramCache]: Analyzing trace with hash -597583559, now seen corresponding path program 21 times [2020-10-12 09:33:57,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:33:57,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884165671] [2020-10-12 09:33:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:33:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:33:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:57,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:57,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:58,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:33:58,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:02,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:02,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 09:34:02,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:34:02,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:34:02,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:34:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:34:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 09:34:02,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:03,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:34:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:03,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:03,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:03,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:34:03,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:03,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:03,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:03,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:34:03,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:34:03,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:03,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:34:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:03,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:03,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:03,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:03,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:03,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:34:03,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:03,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:34:03,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:03,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:34:03,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:03,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 09:34:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:03,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:03,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:03,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:03,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:03,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:03,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:03,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:03,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:03,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:03,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:03,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 09:34:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:03,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:03,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:03,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:03,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:03,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:03,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:03,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:03,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 09:34:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:03,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:03,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:03,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:03,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:03,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:03,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:03,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:03,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:03,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:03,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:03,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-12 09:34:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:03,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:03,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:03,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:03,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:03,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:03,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:03,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:03,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:03,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:03,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 9 proven. 133 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 09:34:03,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884165671] [2020-10-12 09:34:03,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:34:03,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:34:03,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189467611] [2020-10-12 09:34:03,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:34:03,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:34:03,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:34:03,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:34:03,903 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand 28 states. [2020-10-12 09:34:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:34:06,668 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2020-10-12 09:34:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:34:06,668 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2020-10-12 09:34:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:34:06,669 INFO L225 Difference]: With dead ends: 139 [2020-10-12 09:34:06,669 INFO L226 Difference]: Without dead ends: 137 [2020-10-12 09:34:06,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=164, Invalid=1998, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:34:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-12 09:34:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2020-10-12 09:34:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 09:34:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-10-12 09:34:06,727 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 74 [2020-10-12 09:34:06,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:34:06,731 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-10-12 09:34:06,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:34:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-10-12 09:34:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 09:34:06,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:34:06,736 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] [2020-10-12 09:34:06,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:34:06,737 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:34:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:34:06,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1540016130, now seen corresponding path program 6 times [2020-10-12 09:34:06,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:34:06,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375436466] [2020-10-12 09:34:06,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:34:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:06,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:06,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:07,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:07,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:07,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:07,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:09,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:09,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:09,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:09,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:09,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:10,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:10,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:11,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:11,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:11,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:11,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 09:34:11,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 09:34:11,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:34:11,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:34:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:34:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 09:34:11,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:12,851 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-12 09:34:14,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:34:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:14,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:14,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:14,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:34:14,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:14,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:14,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:14,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:34:14,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:14,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:34:14,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:14,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-12 09:34:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:14,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:14,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:14,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:14,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:34:14,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:14,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:34:14,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:14,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:34:14,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:14,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 09:34:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:14,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:14,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:14,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:14,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:14,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:34:14,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:14,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:14,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:14,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:14,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:14,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-12 09:34:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:14,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:14,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:14,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:14,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:14,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:14,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:14,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:14,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:14,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:14,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:14,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-12 09:34:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:14,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:14,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:14,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:14,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:14,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:14,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:14,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:14,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:14,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:14,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 09:34:14,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375436466] [2020-10-12 09:34:14,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:34:14,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:34:14,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674447851] [2020-10-12 09:34:14,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:34:14,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:34:14,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:34:14,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:34:14,360 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 31 states. [2020-10-12 09:34:16,527 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-12 09:34:17,595 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-12 09:34:19,362 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-12 09:34:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:34:20,612 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2020-10-12 09:34:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:34:20,615 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2020-10-12 09:34:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:34:20,617 INFO L225 Difference]: With dead ends: 188 [2020-10-12 09:34:20,617 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 09:34:20,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=200, Invalid=2556, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:34:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 09:34:20,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 126. [2020-10-12 09:34:20,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 09:34:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2020-10-12 09:34:20,654 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 73 [2020-10-12 09:34:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:34:20,654 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2020-10-12 09:34:20,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:34:20,655 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2020-10-12 09:34:20,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 09:34:20,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:34:20,656 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:34:20,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:34:20,656 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:34:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:34:20,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1897705093, now seen corresponding path program 22 times [2020-10-12 09:34:20,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:34:20,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098862530] [2020-10-12 09:34:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:34:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:20,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:20,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:21,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:21,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:22,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:22,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:25,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:25,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:25,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:25,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 09:34:25,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:34:25,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:34:25,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:25,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:34:25,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 09:34:25,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 09:34:25,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:26,808 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-10-12 09:34:27,217 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-10-12 09:34:28,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:34:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:28,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:28,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:28,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:34:28,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:34:28,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:34:28,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:28,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 09:34:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:28,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:28,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:28,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:28,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:34:28,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:28,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:34:28,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:28,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:34:28,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:28,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 09:34:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:28,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:28,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:28,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:28,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:28,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:28,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:28,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:28,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:28,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:28,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:28,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-12 09:34:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:28,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:28,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:28,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:28,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:28,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:34:28,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:28,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:28,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 09:34:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:28,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:28,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:28,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:28,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:28,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:28,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:28,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:28,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:28,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:28,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 7 proven. 187 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 09:34:28,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098862530] [2020-10-12 09:34:28,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:34:28,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:34:28,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269013136] [2020-10-12 09:34:28,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:34:28,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:34:28,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:34:28,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:34:28,554 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand 34 states. [2020-10-12 09:34:29,790 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-12 09:34:30,050 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-12 09:34:30,268 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-12 09:34:30,527 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-12 09:34:30,773 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-12 09:34:31,102 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-12 09:34:31,368 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-12 09:34:31,728 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-12 09:34:32,040 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-12 09:34:32,445 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-12 09:34:32,883 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-12 09:34:33,326 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-12 09:34:33,798 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-12 09:34:34,081 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-12 09:34:34,477 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-12 09:34:34,768 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-12 09:34:35,177 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-12 09:34:35,452 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-12 09:34:35,748 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-12 09:34:36,456 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-12 09:34:36,973 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-12 09:34:37,271 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-12 09:34:37,827 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-12 09:34:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:34:37,967 INFO L93 Difference]: Finished difference Result 246 states and 298 transitions. [2020-10-12 09:34:37,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 09:34:37,970 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-12 09:34:37,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:34:37,971 INFO L225 Difference]: With dead ends: 246 [2020-10-12 09:34:37,972 INFO L226 Difference]: Without dead ends: 244 [2020-10-12 09:34:37,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=682, Invalid=3608, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 09:34:37,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-12 09:34:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 128. [2020-10-12 09:34:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 09:34:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2020-10-12 09:34:38,024 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 75 [2020-10-12 09:34:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:34:38,025 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2020-10-12 09:34:38,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:34:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2020-10-12 09:34:38,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 09:34:38,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:34:38,026 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:34:38,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:34:38,027 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:34:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:34:38,027 INFO L82 PathProgramCache]: Analyzing trace with hash -506455918, now seen corresponding path program 23 times [2020-10-12 09:34:38,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:34:38,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722119232] [2020-10-12 09:34:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:34:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:38,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:38,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:38,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:38,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:39,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:40,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:42,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:43,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:43,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 09:34:43,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:34:43,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:34:43,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:34:43,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:34:43,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-12 09:34:43,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:44,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:34:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:44,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:44,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:44,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:34:44,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:44,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:34:44,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:34:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:34:44,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:44,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 09:34:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:44,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:44,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:44,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:44,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:44,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:34:44,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:44,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:34:44,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:44,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:34:44,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:44,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 09:34:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:44,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:44,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:44,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:44,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:44,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:44,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:44,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:44,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:44,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:44,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:44,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 09:34:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:44,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:44,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:44,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:44,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:44,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:44,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:44,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:44,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 09:34:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:44,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:44,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:44,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:44,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:44,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:44,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:44,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:44,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:44,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:44,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:44,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-12 09:34:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:44,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:44,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:34:44,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:34:44,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:34:44,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:34:44,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:34:44,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:34:44,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:34:44,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:34:44,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:34:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 9 proven. 155 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 09:34:44,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722119232] [2020-10-12 09:34:44,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:34:44,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:34:44,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361472448] [2020-10-12 09:34:44,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:34:44,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:34:44,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:34:44,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:34:44,852 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand 31 states. [2020-10-12 09:34:48,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:34:48,962 INFO L93 Difference]: Finished difference Result 175 states and 206 transitions. [2020-10-12 09:34:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:34:48,963 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 77 [2020-10-12 09:34:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:34:48,965 INFO L225 Difference]: With dead ends: 175 [2020-10-12 09:34:48,966 INFO L226 Difference]: Without dead ends: 173 [2020-10-12 09:34:48,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=207, Invalid=2655, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 09:34:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-12 09:34:49,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 136. [2020-10-12 09:34:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 09:34:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2020-10-12 09:34:49,018 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 77 [2020-10-12 09:34:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:34:49,018 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2020-10-12 09:34:49,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:34:49,018 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2020-10-12 09:34:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 09:34:49,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:34:49,019 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] [2020-10-12 09:34:49,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:34:49,020 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:34:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:34:49,020 INFO L82 PathProgramCache]: Analyzing trace with hash -950896247, now seen corresponding path program 7 times [2020-10-12 09:34:49,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:34:49,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941374045] [2020-10-12 09:34:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:34:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:34:49,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:49,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:49,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:49,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:49,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:49,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:50,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:34:50,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking...