/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-crafted/zero_sum3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:39:11,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:39:11,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:39:11,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:39:11,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:39:11,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:39:12,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:39:12,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:39:12,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:39:12,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:39:12,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:39:12,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:39:12,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:39:12,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:39:12,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:39:12,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:39:12,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:39:12,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:39:12,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:39:12,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:39:12,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:39:12,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:39:12,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:39:12,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:39:12,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:39:12,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:39:12,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:39:12,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:39:12,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:39:12,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:39:12,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:39:12,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:39:12,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:39:12,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:39:12,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:39:12,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:39:12,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:39:12,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:39:12,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:39:12,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:39:12,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:39:12,066 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 09:39:12,104 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:39:12,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:39:12,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:39:12,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:39:12,106 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:39:12,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:39:12,107 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:39:12,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:39:12,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:39:12,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:39:12,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:39:12,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:39:12,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:39:12,109 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:39:12,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:39:12,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:39:12,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:39:12,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:39:12,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:39:12,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:39:12,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:39:12,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:39:12,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:39:12,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:39:12,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:39:12,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:39:12,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:39:12,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:39:12,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:39:12,113 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 09:39:12,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:39:12,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:39:12,469 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:39:12,472 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:39:12,472 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:39:12,473 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-12 09:39:12,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/040c75b75/fd4f11a63a5a4099a882716b9cb58be7/FLAG7167f1adb [2020-10-12 09:39:13,011 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:39:13,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-12 09:39:13,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/040c75b75/fd4f11a63a5a4099a882716b9cb58be7/FLAG7167f1adb [2020-10-12 09:39:13,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/040c75b75/fd4f11a63a5a4099a882716b9cb58be7 [2020-10-12 09:39:13,359 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:39:13,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:39:13,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:39:13,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:39:13,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:39:13,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:39:13" (1/1) ... [2020-10-12 09:39:13,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243b67dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:13, skipping insertion in model container [2020-10-12 09:39:13,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:39:13" (1/1) ... [2020-10-12 09:39:13,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:39:13,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:39:13,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:39:13,623 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:39:13,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:39:13,669 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:39:13,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:13 WrapperNode [2020-10-12 09:39:13,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:39:13,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:39:13,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:39:13,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:39:13,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:13" (1/1) ... [2020-10-12 09:39:13,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:13" (1/1) ... [2020-10-12 09:39:13,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:13" (1/1) ... [2020-10-12 09:39:13,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:13" (1/1) ... [2020-10-12 09:39:13,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:13" (1/1) ... [2020-10-12 09:39:13,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:13" (1/1) ... [2020-10-12 09:39:13,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:13" (1/1) ... [2020-10-12 09:39:13,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:39:13,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:39:13,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:39:13,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:39:13,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:13" (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 09:39:13,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:39:13,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:39:13,850 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 09:39:13,850 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:39:13,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:39:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:39:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 09:39:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 09:39:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:39:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-12 09:39:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:39:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:39:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:39:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:39:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:39:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:39:13,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:39:14,165 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:39:14,165 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-12 09:39:14,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:39:14 BoogieIcfgContainer [2020-10-12 09:39:14,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:39:14,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:39:14,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:39:14,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:39:14,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:39:13" (1/3) ... [2020-10-12 09:39:14,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fdf83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:39:14, skipping insertion in model container [2020-10-12 09:39:14,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:13" (2/3) ... [2020-10-12 09:39:14,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fdf83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:39:14, skipping insertion in model container [2020-10-12 09:39:14,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:39:14" (3/3) ... [2020-10-12 09:39:14,179 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2020-10-12 09:39:14,190 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:39:14,198 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:39:14,212 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:39:14,244 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:39:14,245 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:39:14,245 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:39:14,245 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:39:14,245 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:39:14,245 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:39:14,245 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:39:14,245 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:39:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-12 09:39:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 09:39:14,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:14,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:14,274 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:14,279 INFO L82 PathProgramCache]: Analyzing trace with hash 303510615, now seen corresponding path program 1 times [2020-10-12 09:39:14,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:14,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503291384] [2020-10-12 09:39:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:14,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:14,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:14,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:14,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:14,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:14,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:14,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:15,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:15,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:15,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 09:39:15,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:39:15,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-12 09:39:15,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:15,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:39:15,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:39:15,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:39:15,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:39:15,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:15,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:15,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:15,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:15,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:15,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:39:15,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:15,594 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 09:39:15,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503291384] [2020-10-12 09:39:15,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:39:15,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 09:39:15,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839090638] [2020-10-12 09:39:15,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:39:15,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:39:15,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:39:15,623 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 6 states. [2020-10-12 09:39:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:15,853 INFO L93 Difference]: Finished difference Result 91 states and 133 transitions. [2020-10-12 09:39:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:39:15,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-12 09:39:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:15,872 INFO L225 Difference]: With dead ends: 91 [2020-10-12 09:39:15,872 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 09:39:15,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:39:15,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 09:39:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 09:39:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:39:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-12 09:39:15,922 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 24 [2020-10-12 09:39:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:15,923 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-12 09:39:15,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:39:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-12 09:39:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:39:15,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:15,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:15,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:39:15,926 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:15,926 INFO L82 PathProgramCache]: Analyzing trace with hash 545309699, now seen corresponding path program 1 times [2020-10-12 09:39:15,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:15,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294968501] [2020-10-12 09:39:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:15,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:15,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:15,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:15,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:15,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:20,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:20,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 09:39:20,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 09:39:20,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:39:20,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:39:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 09:39:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:39:20,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:20,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:20,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:20,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:20,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:20,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:20,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:39:20,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:20,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:20,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:20,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:20,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:39:21,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294968501] [2020-10-12 09:39:21,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:39:21,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 09:39:21,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360042116] [2020-10-12 09:39:21,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:39:21,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:21,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:39:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:39:21,007 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 6 states. [2020-10-12 09:39:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:21,299 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2020-10-12 09:39:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:39:21,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-12 09:39:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:21,301 INFO L225 Difference]: With dead ends: 86 [2020-10-12 09:39:21,302 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 09:39:21,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:39:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 09:39:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-10-12 09:39:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 09:39:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-12 09:39:21,314 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 26 [2020-10-12 09:39:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:21,315 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-12 09:39:21,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:39:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-12 09:39:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:39:21,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:21,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:21,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:39:21,319 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1486801725, now seen corresponding path program 1 times [2020-10-12 09:39:21,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:21,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496077287] [2020-10-12 09:39:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:21,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:25,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:25,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 09:39:25,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 09:39:25,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4493 [2020-10-12 09:39:25,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:25,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:39:25,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:39:25,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:39:25,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:39:25,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:25,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:25,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:25,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:25,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:25,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:39:25,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:25,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:25,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:25,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:25,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:25,914 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 09:39:25,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496077287] [2020-10-12 09:39:25,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:25,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:39:25,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894300858] [2020-10-12 09:39:25,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:39:25,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:25,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:39:25,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:39:25,921 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 6 states. [2020-10-12 09:39:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:26,166 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-10-12 09:39:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:39:26,167 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-12 09:39:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:26,168 INFO L225 Difference]: With dead ends: 51 [2020-10-12 09:39:26,169 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 09:39:26,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:39:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 09:39:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 09:39:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 09:39:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-12 09:39:26,183 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 26 [2020-10-12 09:39:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:26,183 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-12 09:39:26,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:39:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-12 09:39:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:39:26,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:26,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:26,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:39:26,186 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1611827335, now seen corresponding path program 1 times [2020-10-12 09:39:26,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:26,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405632950] [2020-10-12 09:39:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:26,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:31,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:31,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:39:31,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:39:31,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:39:31,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:31,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:39:31,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:39:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:39:31,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:31,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:31,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:31,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:31,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:31,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:31,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 09:39:31,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:31,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:31,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:31,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 09:39:31,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405632950] [2020-10-12 09:39:31,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:31,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:39:31,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432890436] [2020-10-12 09:39:31,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:39:31,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:31,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:39:31,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:39:31,284 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 6 states. [2020-10-12 09:39:31,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:31,502 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-10-12 09:39:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:39:31,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-12 09:39:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:31,504 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:39:31,504 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 09:39:31,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:39:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 09:39:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-12 09:39:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 09:39:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-10-12 09:39:31,521 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 36 [2020-10-12 09:39:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:31,521 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-10-12 09:39:31,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:39:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-10-12 09:39:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 09:39:31,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:31,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:31,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:39:31,526 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:31,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:31,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1826760493, now seen corresponding path program 2 times [2020-10-12 09:39:31,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:31,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783314268] [2020-10-12 09:39:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:31,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:31,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:31,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:32,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:33,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:33,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:34,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:34,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:34,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:36,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:36,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 09:39:36,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:39:36,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-12 09:39:36,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:36,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:39:36,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:39:36,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 09:39:36,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:38,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:38,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:38,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:38,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:38,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:38,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:39:38,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:38,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:39:38,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783314268] [2020-10-12 09:39:38,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:38,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:39:38,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106519058] [2020-10-12 09:39:38,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:39:38,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:39:38,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:39:38,817 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 32 states. [2020-10-12 09:39:39,599 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-12 09:39:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:41,191 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2020-10-12 09:39:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:39:41,191 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 48 [2020-10-12 09:39:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:41,194 INFO L225 Difference]: With dead ends: 93 [2020-10-12 09:39:41,194 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:39:41,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=263, Invalid=1807, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:39:41,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:39:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2020-10-12 09:39:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 09:39:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-10-12 09:39:41,216 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 48 [2020-10-12 09:39:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:41,216 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-10-12 09:39:41,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:39:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-10-12 09:39:41,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 09:39:41,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:41,218 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:41,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:39:41,218 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:41,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:41,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1922554005, now seen corresponding path program 3 times [2020-10-12 09:39:41,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:41,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557234377] [2020-10-12 09:39:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:41,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:41,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:41,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:41,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:41,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:45,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:46,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 09:39:46,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:39:46,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:39:46,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:39:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 09:39:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:39:46,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:46,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:46,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:46,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:46,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:46,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:39:46,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:46,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:46,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:46,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:46,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 09:39:46,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557234377] [2020-10-12 09:39:46,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:46,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:39:46,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135218077] [2020-10-12 09:39:46,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:39:46,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:46,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:39:46,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:39:46,325 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 10 states. [2020-10-12 09:39:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:46,845 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2020-10-12 09:39:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:39:46,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-12 09:39:46,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:46,847 INFO L225 Difference]: With dead ends: 121 [2020-10-12 09:39:46,848 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 09:39:46,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:39:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 09:39:46,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-12 09:39:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 09:39:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2020-10-12 09:39:46,861 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 50 [2020-10-12 09:39:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:46,862 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2020-10-12 09:39:46,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:39:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2020-10-12 09:39:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 09:39:46,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:46,864 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:46,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:39:46,864 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:46,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:46,864 INFO L82 PathProgramCache]: Analyzing trace with hash -107637013, now seen corresponding path program 4 times [2020-10-12 09:39:46,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:46,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265928850] [2020-10-12 09:39:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:46,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:47,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:51,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:51,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 09:39:51,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:39:51,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:39:51,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:51,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:39:51,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 09:39:51,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:39:51,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:51,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:51,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:51,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:51,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:51,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:51,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:39:51,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:51,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 09:39:51,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265928850] [2020-10-12 09:39:51,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:51,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:39:51,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249384254] [2020-10-12 09:39:51,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:39:51,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:51,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:39:51,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:39:51,951 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 10 states. [2020-10-12 09:39:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:52,345 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2020-10-12 09:39:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:39:52,346 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-12 09:39:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:52,347 INFO L225 Difference]: With dead ends: 137 [2020-10-12 09:39:52,347 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 09:39:52,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:39:52,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 09:39:52,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2020-10-12 09:39:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 09:39:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-12 09:39:52,365 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 50 [2020-10-12 09:39:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:52,366 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-12 09:39:52,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:39:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-12 09:39:52,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 09:39:52,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:52,367 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:52,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:39:52,368 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:52,368 INFO L82 PathProgramCache]: Analyzing trace with hash 620869857, now seen corresponding path program 5 times [2020-10-12 09:39:52,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:52,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258518718] [2020-10-12 09:39:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:52,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:52,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:52,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:53,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:54,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:54,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:55,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:55,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:56,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:56,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:56,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:57,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:57,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:57,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 09:39:57,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 09:39:57,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-12 09:39:57,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:57,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 09:39:57,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:39:57,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 09:39:57,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:00,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:00,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:00,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:00,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:00,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:00,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:00,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:00,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:00,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:00,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:00,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:40:00,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258518718] [2020-10-12 09:40:00,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:00,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 09:40:00,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597310516] [2020-10-12 09:40:00,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 09:40:00,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 09:40:00,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:40:00,174 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 44 states. [2020-10-12 09:40:01,000 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2020-10-12 09:40:01,660 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-12 09:40:02,007 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-12 09:40:02,234 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-10-12 09:40:02,524 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 49 [2020-10-12 09:40:02,799 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-12 09:40:03,439 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-12 09:40:04,538 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 37 [2020-10-12 09:40:04,774 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 39 [2020-10-12 09:40:05,157 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2020-10-12 09:40:05,560 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 43 [2020-10-12 09:40:06,078 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 56 [2020-10-12 09:40:06,363 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-12 09:40:06,865 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-12 09:40:07,468 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-12 09:40:07,769 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-10-12 09:40:08,293 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 36 [2020-10-12 09:40:08,682 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2020-10-12 09:40:11,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:11,009 INFO L93 Difference]: Finished difference Result 197 states and 223 transitions. [2020-10-12 09:40:11,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 09:40:11,010 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 60 [2020-10-12 09:40:11,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:11,013 INFO L225 Difference]: With dead ends: 197 [2020-10-12 09:40:11,014 INFO L226 Difference]: Without dead ends: 143 [2020-10-12 09:40:11,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1025, Invalid=6457, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 09:40:11,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-12 09:40:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2020-10-12 09:40:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 09:40:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-10-12 09:40:11,062 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 60 [2020-10-12 09:40:11,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:11,062 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-10-12 09:40:11,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 09:40:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-10-12 09:40:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 09:40:11,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:11,068 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:11,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:40:11,068 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1012863969, now seen corresponding path program 6 times [2020-10-12 09:40:11,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:11,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400848146] [2020-10-12 09:40:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:11,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:11,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:11,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:11,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:11,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:16,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:16,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:40:16,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:40:16,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:40:16,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:16,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:40:16,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 09:40:16,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:40:16,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:16,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:16,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:16,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:16,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:16,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:16,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:16,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:16,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:16,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:16,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:16,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 09:40:16,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400848146] [2020-10-12 09:40:16,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:16,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:40:16,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982742061] [2020-10-12 09:40:16,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:40:16,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:16,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:40:16,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:40:16,201 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 12 states. [2020-10-12 09:40:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:17,010 INFO L93 Difference]: Finished difference Result 184 states and 204 transitions. [2020-10-12 09:40:17,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:40:17,011 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-12 09:40:17,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:17,012 INFO L225 Difference]: With dead ends: 184 [2020-10-12 09:40:17,012 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 09:40:17,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:40:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 09:40:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2020-10-12 09:40:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 09:40:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2020-10-12 09:40:17,043 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 62 [2020-10-12 09:40:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:17,044 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2020-10-12 09:40:17,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:40:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2020-10-12 09:40:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 09:40:17,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:17,047 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:17,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:40:17,048 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:17,048 INFO L82 PathProgramCache]: Analyzing trace with hash 672631711, now seen corresponding path program 7 times [2020-10-12 09:40:17,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:17,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363428628] [2020-10-12 09:40:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:17,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:17,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:17,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:17,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:17,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:22,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:22,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:40:22,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:40:22,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:40:22,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:22,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:40:22,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 09:40:22,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:40:22,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:40:22,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:22,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:22,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:22,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:22,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:22,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:22,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:22,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:22,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:22,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:22,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 09:40:22,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363428628] [2020-10-12 09:40:22,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:22,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:40:22,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598360632] [2020-10-12 09:40:22,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:40:22,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:22,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:40:22,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:40:22,177 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 12 states. [2020-10-12 09:40:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:22,673 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2020-10-12 09:40:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:40:22,674 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-12 09:40:22,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:22,675 INFO L225 Difference]: With dead ends: 167 [2020-10-12 09:40:22,675 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 09:40:22,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:40:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 09:40:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-10-12 09:40:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 09:40:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-10-12 09:40:22,707 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 62 [2020-10-12 09:40:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:22,707 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-10-12 09:40:22,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:40:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-10-12 09:40:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 09:40:22,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:22,709 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:22,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:40:22,709 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:22,710 INFO L82 PathProgramCache]: Analyzing trace with hash -13816683, now seen corresponding path program 8 times [2020-10-12 09:40:22,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:22,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631804576] [2020-10-12 09:40:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:22,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:22,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:23,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:24,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:25,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:26,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:26,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:27,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:27,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:27,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 09:40:27,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:40:27,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5159 [2020-10-12 09:40:27,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:27,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 09:40:27,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:40:27,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 09:40:27,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:29,903 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-10-12 09:40:30,734 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-12 09:40:31,232 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-12 09:40:31,744 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-12 09:40:31,936 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-12 09:40:32,558 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2020-10-12 09:40:33,147 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-12 09:40:34,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:34,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:34,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:34,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:34,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:34,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:34,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:34,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:34,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:40:35,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631804576] [2020-10-12 09:40:35,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:35,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 09:40:35,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134678879] [2020-10-12 09:40:35,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 09:40:35,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 09:40:35,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2629, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 09:40:35,035 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 54 states. [2020-10-12 09:40:35,416 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-12 09:40:35,689 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-12 09:40:35,920 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-12 09:40:36,269 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-12 09:40:36,521 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-12 09:40:37,121 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-12 09:40:38,569 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-12 09:40:38,755 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-12 09:40:39,362 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-10-12 09:40:39,785 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 76 [2020-10-12 09:40:40,077 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 63 [2020-10-12 09:40:40,424 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 60 [2020-10-12 09:40:40,877 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-10-12 09:40:41,217 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-10-12 09:40:41,734 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-12 09:40:42,049 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 09:40:42,429 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 37 [2020-10-12 09:40:42,863 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-12 09:40:43,288 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-12 09:40:43,546 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 35 [2020-10-12 09:40:43,817 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 53 [2020-10-12 09:40:44,483 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 25 [2020-10-12 09:40:44,778 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 43 [2020-10-12 09:40:45,261 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 37 [2020-10-12 09:40:45,541 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 31 [2020-10-12 09:40:45,881 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 46 [2020-10-12 09:40:46,309 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 42 [2020-10-12 09:40:46,890 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2020-10-12 09:40:47,340 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 72 [2020-10-12 09:40:47,781 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 53 [2020-10-12 09:40:48,311 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 73 [2020-10-12 09:40:48,781 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 69 [2020-10-12 09:40:49,134 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 63 [2020-10-12 09:40:49,766 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 69 [2020-10-12 09:40:50,274 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 59 [2020-10-12 09:40:50,972 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 90 [2020-10-12 09:40:51,546 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 105 [2020-10-12 09:40:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:53,494 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2020-10-12 09:40:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 09:40:53,495 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 72 [2020-10-12 09:40:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:53,499 INFO L225 Difference]: With dead ends: 181 [2020-10-12 09:40:53,499 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 09:40:53,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=1539, Invalid=11117, Unknown=0, NotChecked=0, Total=12656 [2020-10-12 09:40:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 09:40:53,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 109. [2020-10-12 09:40:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 09:40:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2020-10-12 09:40:53,519 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 72 [2020-10-12 09:40:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:53,520 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2020-10-12 09:40:53,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 09:40:53,520 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2020-10-12 09:40:53,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 09:40:53,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:53,521 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:53,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:40:53,521 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:53,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:53,522 INFO L82 PathProgramCache]: Analyzing trace with hash -807361901, now seen corresponding path program 9 times [2020-10-12 09:40:53,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:53,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709805267] [2020-10-12 09:40:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:53,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:53,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:53,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:53,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:53,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:58,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:58,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 09:40:58,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:40:58,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:40:58,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:58,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:40:58,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 09:40:58,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:40:58,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:58,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:58,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:58,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:58,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:58,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:58,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:58,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:58,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:58,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:40:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 09:40:58,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709805267] [2020-10-12 09:40:58,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:58,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:40:58,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831987604] [2020-10-12 09:40:58,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:40:58,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:58,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:40:58,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:40:58,729 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 14 states. [2020-10-12 09:40:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:59,516 INFO L93 Difference]: Finished difference Result 229 states and 252 transitions. [2020-10-12 09:40:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:40:59,517 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-12 09:40:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:59,519 INFO L225 Difference]: With dead ends: 229 [2020-10-12 09:40:59,519 INFO L226 Difference]: Without dead ends: 137 [2020-10-12 09:40:59,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:40:59,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-12 09:40:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 124. [2020-10-12 09:40:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 09:40:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2020-10-12 09:40:59,535 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 74 [2020-10-12 09:40:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:59,536 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2020-10-12 09:40:59,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:40:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2020-10-12 09:40:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 09:40:59,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:59,537 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:59,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:40:59,537 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:59,538 INFO L82 PathProgramCache]: Analyzing trace with hash 257328019, now seen corresponding path program 10 times [2020-10-12 09:40:59,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:59,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642397658] [2020-10-12 09:40:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:59,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:59,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:59,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:59,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:04,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:04,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 09:41:04,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:41:04,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:41:04,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:41:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:41:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:41:04,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:04,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:41:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:04,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:04,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:04,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:41:04,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:41:04,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:41:04,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:04,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:41:04,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:41:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:41:04,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:41:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 09:41:04,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642397658] [2020-10-12 09:41:04,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:41:04,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:41:04,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969417786] [2020-10-12 09:41:04,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:41:04,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:41:04,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:41:04,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:41:04,745 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 14 states. [2020-10-12 09:41:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:41:05,715 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2020-10-12 09:41:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:41:05,716 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-12 09:41:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:41:05,717 INFO L225 Difference]: With dead ends: 131 [2020-10-12 09:41:05,717 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 09:41:05,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:41:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 09:41:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-12 09:41:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 09:41:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2020-10-12 09:41:05,734 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 74 [2020-10-12 09:41:05,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:41:05,734 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2020-10-12 09:41:05,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:41:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2020-10-12 09:41:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 09:41:05,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:41:05,735 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:41:05,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:41:05,736 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:41:05,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:41:05,736 INFO L82 PathProgramCache]: Analyzing trace with hash 96830025, now seen corresponding path program 11 times [2020-10-12 09:41:05,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:41:05,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351666394] [2020-10-12 09:41:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:41:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:05,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:05,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:06,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:07,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:08,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:10,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:10,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 09:41:10,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:41:10,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:41:10,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:10,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 09:41:10,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:41:10,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 09:41:10,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:11,811 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-12 09:41:11,988 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-12 09:41:12,409 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-12 09:41:12,580 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-12 09:41:12,766 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2020-10-12 09:41:12,979 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-10-12 09:41:13,188 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-12 09:41:13,421 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2020-10-12 09:41:13,654 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2020-10-12 09:41:13,885 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2020-10-12 09:41:14,144 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-10-12 09:41:14,328 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2020-10-12 09:41:14,586 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2020-10-12 09:41:14,848 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 32 [2020-10-12 09:41:15,108 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-10-12 09:41:15,364 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2020-10-12 09:41:15,666 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2020-10-12 09:41:15,979 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-10-12 09:41:16,254 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2020-10-12 09:41:16,539 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2020-10-12 09:41:16,825 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-12 09:41:17,110 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2020-10-12 09:41:17,439 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2020-10-12 09:41:17,777 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2020-10-12 09:41:18,101 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-12 09:41:18,409 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-12 09:41:18,734 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-12 09:41:19,061 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-10-12 09:41:19,386 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2020-10-12 09:41:19,758 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2020-10-12 09:41:20,150 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-12 09:41:20,572 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2020-10-12 09:41:21,145 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-12 09:41:21,599 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2020-10-12 09:41:21,998 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2020-10-12 09:41:22,374 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-10-12 09:41:22,818 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2020-10-12 09:41:23,230 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 48 [2020-10-12 09:41:23,608 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-12 09:41:24,008 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-12 09:41:24,388 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2020-10-12 09:41:24,827 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2020-10-12 09:41:25,143 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-10-12 09:41:25,418 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2020-10-12 09:41:25,707 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-12 09:41:26,002 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-10-12 09:41:26,360 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2020-10-12 09:41:27,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:41:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:27,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:27,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:27,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:41:27,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:41:27,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:41:27,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:41:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:41:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:41:27,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 22 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:41:27,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351666394] [2020-10-12 09:41:27,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:41:27,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-12 09:41:27,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957735788] [2020-10-12 09:41:27,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-12 09:41:27,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:41:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-12 09:41:27,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=4188, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 09:41:27,723 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand 68 states. [2020-10-12 09:41:28,366 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 15 [2020-10-12 09:41:28,925 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-12 09:41:29,320 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2020-10-12 09:41:29,640 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-12 09:41:30,188 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2020-10-12 09:41:30,584 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-10-12 09:41:30,955 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-12 09:41:32,082 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-12 09:41:32,713 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-12 09:41:33,260 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-12 09:41:33,560 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-12 09:41:34,555 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2020-10-12 09:41:34,830 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2020-10-12 09:41:35,099 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2020-10-12 09:41:35,834 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 79 [2020-10-12 09:41:36,131 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-10-12 09:41:36,440 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2020-10-12 09:41:36,807 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-12 09:41:37,151 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-12 09:41:37,532 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-12 09:41:37,925 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-12 09:41:38,265 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-10-12 09:41:38,627 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-10-12 09:41:38,997 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-12 09:41:39,870 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2020-10-12 09:41:40,371 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 09:41:41,100 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 79 [2020-10-12 09:41:41,668 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-10-12 09:41:42,008 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-10-12 09:41:42,738 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-12 09:41:43,043 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2020-10-12 09:41:43,930 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 82 [2020-10-12 09:41:45,086 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 99 [2020-10-12 09:41:45,449 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2020-10-12 09:41:46,502 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 97 [2020-10-12 09:41:47,625 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 96 [2020-10-12 09:41:48,507 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 72 [2020-10-12 09:41:49,742 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 105 [2020-10-12 09:41:50,711 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 87 [2020-10-12 09:41:51,440 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 99 [2020-10-12 09:41:52,243 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 71 [2020-10-12 09:41:53,038 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 72 [2020-10-12 09:41:53,896 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 70 [2020-10-12 09:41:54,598 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 65 [2020-10-12 09:41:55,391 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 73 [2020-10-12 09:41:55,787 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2020-10-12 09:41:57,109 WARN L193 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 81 [2020-10-12 09:41:57,679 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2020-10-12 09:41:58,847 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 94 [2020-10-12 09:41:59,247 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-10-12 09:42:00,455 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 95 [2020-10-12 09:42:00,940 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 50 [2020-10-12 09:42:02,320 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 184 DAG size of output: 104 [2020-10-12 09:42:02,660 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2020-10-12 09:42:03,133 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 51 [2020-10-12 09:42:04,316 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 102 [2020-10-12 09:42:04,956 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 57 [2020-10-12 09:42:07,211 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 194 DAG size of output: 112 [2020-10-12 09:42:07,907 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 54 [2020-10-12 09:42:08,677 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 44 [2020-10-12 09:42:09,286 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 41 [2020-10-12 09:42:10,324 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 75 [2020-10-12 09:42:11,206 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2020-10-12 09:42:12,767 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 131 DAG size of output: 80 [2020-10-12 09:42:14,071 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 72 [2020-10-12 09:42:14,505 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2020-10-12 09:42:15,744 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 69 [2020-10-12 09:42:16,152 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 41 [2020-10-12 09:42:18,040 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 161 DAG size of output: 102 [2020-10-12 09:42:18,733 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 36 [2020-10-12 09:42:19,304 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-12 09:42:19,937 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 40 [2020-10-12 09:42:20,655 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 33 [2020-10-12 09:42:21,367 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 38 [2020-10-12 09:42:22,676 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 71 [2020-10-12 09:42:24,006 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 75 [2020-10-12 09:42:25,103 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 77 [2020-10-12 09:42:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:42:28,777 INFO L93 Difference]: Finished difference Result 188 states and 209 transitions. [2020-10-12 09:42:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-12 09:42:28,782 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 84 [2020-10-12 09:42:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:42:28,784 INFO L225 Difference]: With dead ends: 188 [2020-10-12 09:42:28,784 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 09:42:28,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6000 ImplicationChecksByTransitivity, 64.5s TimeCoverageRelationStatistics Valid=2717, Invalid=21463, Unknown=0, NotChecked=0, Total=24180 [2020-10-12 09:42:28,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 09:42:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2020-10-12 09:42:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 09:42:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2020-10-12 09:42:28,804 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 84 [2020-10-12 09:42:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:42:28,804 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2020-10-12 09:42:28,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-12 09:42:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2020-10-12 09:42:28,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 09:42:28,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:42:28,805 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:42:28,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:42:28,806 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:42:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:42:28,806 INFO L82 PathProgramCache]: Analyzing trace with hash -2019877881, now seen corresponding path program 12 times [2020-10-12 09:42:28,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:42:28,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306883970] [2020-10-12 09:42:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:42:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:42:28,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:28,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:28,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:28,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:29,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:33,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:42:33,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 09:42:33,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:42:33,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:42:33,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:42:33,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:42:33,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 09:42:33,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:42:33,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:42:34,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:42:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:42:34,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:34,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:42:34,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:42:34,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:42:34,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:42:34,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:42:34,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:42:34,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:42:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:42:34,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:42:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-12 09:42:34,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306883970] [2020-10-12 09:42:34,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:42:34,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:42:34,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779664884] [2020-10-12 09:42:34,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:42:34,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:42:34,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:42:34,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:42:34,348 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 16 states. [2020-10-12 09:42:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:42:36,651 INFO L93 Difference]: Finished difference Result 163 states and 178 transitions. [2020-10-12 09:42:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:42:36,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-10-12 09:42:36,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:42:36,656 INFO L225 Difference]: With dead ends: 163 [2020-10-12 09:42:36,656 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 09:42:36,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:42:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 09:42:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-10-12 09:42:36,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 09:42:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2020-10-12 09:42:36,669 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 86 [2020-10-12 09:42:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:42:36,669 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2020-10-12 09:42:36,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:42:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2020-10-12 09:42:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 09:42:36,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:42:36,671 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:42:36,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:42:36,671 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:42:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:42:36,671 INFO L82 PathProgramCache]: Analyzing trace with hash 881907071, now seen corresponding path program 13 times [2020-10-12 09:42:36,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:42:36,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201461896] [2020-10-12 09:42:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:42:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:42:36,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:36,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:36,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:36,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:37,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:41,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:42:41,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 09:42:41,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:42:41,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:42:41,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:42:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:42:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:42:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:42:41,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:42:42,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:42:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:42:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:42,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:42:42,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:42:42,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:42:42,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:42:42,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:42:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:42:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:42:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:42:42,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:42:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-12 09:42:42,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201461896] [2020-10-12 09:42:42,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:42:42,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:42:42,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743095567] [2020-10-12 09:42:42,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:42:42,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:42:42,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:42:42,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:42:42,173 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 16 states. [2020-10-12 09:42:43,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:42:43,487 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2020-10-12 09:42:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:42:43,490 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 94 [2020-10-12 09:42:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:42:43,491 INFO L225 Difference]: With dead ends: 179 [2020-10-12 09:42:43,491 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 09:42:43,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:42:43,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 09:42:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-10-12 09:42:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 09:42:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2020-10-12 09:42:43,505 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 94 [2020-10-12 09:42:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:42:43,506 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2020-10-12 09:42:43,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:42:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2020-10-12 09:42:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 09:42:43,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:42:43,507 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:42:43,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:42:43,507 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:42:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:42:43,508 INFO L82 PathProgramCache]: Analyzing trace with hash 380353021, now seen corresponding path program 14 times [2020-10-12 09:42:43,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:42:43,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529791793] [2020-10-12 09:42:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:42:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:42:43,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:43,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:45,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:47,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:49,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:42:49,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 09:42:49,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:42:49,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5670 [2020-10-12 09:42:49,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:42:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 80 [2020-10-12 09:42:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:42:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 09:42:49,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:42:51,143 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-12 09:42:51,605 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-12 09:42:51,980 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-12 09:42:52,261 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-12 09:42:52,546 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-12 09:42:52,856 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-12 09:42:53,179 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-12 09:42:53,558 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-12 09:42:53,927 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-12 09:42:54,314 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-12 09:42:54,732 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-12 09:42:55,212 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-12 09:42:55,571 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-12 09:42:56,305 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-12 09:42:56,808 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-12 09:42:57,240 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-12 09:42:57,735 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-12 09:42:58,048 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-12 09:42:58,312 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-12 09:42:58,592 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-12 09:42:58,934 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-12 09:42:59,304 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-12 09:42:59,981 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-12 09:43:00,361 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-12 09:43:01,155 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-12 09:43:01,593 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-12 09:43:01,949 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-10-12 09:43:02,773 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-10-12 09:43:03,270 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2020-10-12 09:43:03,747 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-12 09:43:04,290 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-10-12 09:43:04,808 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-10-12 09:43:05,308 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-10-12 09:43:05,778 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-10-12 09:43:06,242 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2020-10-12 09:43:06,750 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-10-12 09:43:07,130 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 11 [2020-10-12 09:43:07,696 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 27 [2020-10-12 09:43:08,287 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32