/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/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:33:05,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:33:05,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:33:05,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:33:05,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:33:05,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:33:05,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:33:05,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:33:05,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:33:05,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:33:05,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:33:05,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:33:05,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:33:05,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:33:05,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:33:05,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:33:05,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:33:05,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:33:05,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:33:05,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:33:05,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:33:05,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:33:05,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:33:05,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:33:05,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:33:05,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:33:05,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:33:05,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:33:05,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:33:05,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:33:05,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:33:05,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:33:05,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:33:05,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:33:05,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:33:05,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:33:05,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:33:05,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:33:05,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:33:05,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:33:05,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:33:05,856 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 19:33:05,895 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:33:05,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:33:05,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:33:05,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:33:05,897 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:33:05,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:33:05,898 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:33:05,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:33:05,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:33:05,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:33:05,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:33:05,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:33:05,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:33:05,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:33:05,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:33:05,901 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:33:05,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:33:05,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:33:05,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:33:05,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:33:05,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:33:05,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:33:05,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:33:05,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:33:05,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:33:05,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:33:05,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:33:05,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:33:05,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:33:05,903 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 19:33:06,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:33:06,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:33:06,216 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:33:06,217 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:33:06,218 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:33:06,218 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-12 19:33:06,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/205b8fb7d/a7bae509772f4fba84dbab40ae6f2ef9/FLAG0d9868d08 [2020-10-12 19:33:06,765 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:33:06,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-12 19:33:06,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/205b8fb7d/a7bae509772f4fba84dbab40ae6f2ef9/FLAG0d9868d08 [2020-10-12 19:33:07,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/205b8fb7d/a7bae509772f4fba84dbab40ae6f2ef9 [2020-10-12 19:33:07,152 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:33:07,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:33:07,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:33:07,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:33:07,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:33:07,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:33:07" (1/1) ... [2020-10-12 19:33:07,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4122bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:07, skipping insertion in model container [2020-10-12 19:33:07,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:33:07" (1/1) ... [2020-10-12 19:33:07,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:33:07,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:33:07,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:33:07,486 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:33:07,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:33:07,684 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:33:07,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:07 WrapperNode [2020-10-12 19:33:07,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:33:07,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:33:07,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:33:07,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:33:07,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:07" (1/1) ... [2020-10-12 19:33:07,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:07" (1/1) ... [2020-10-12 19:33:07,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:07" (1/1) ... [2020-10-12 19:33:07,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:07" (1/1) ... [2020-10-12 19:33:07,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:07" (1/1) ... [2020-10-12 19:33:07,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:07" (1/1) ... [2020-10-12 19:33:07,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:07" (1/1) ... [2020-10-12 19:33:07,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:33:07,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:33:07,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:33:07,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:33:07,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:07" (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 19:33:07,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:33:07,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:33:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:33:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:33:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:33:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:33:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:33:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:33:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:33:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:33:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:33:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:33:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:33:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:33:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:33:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:33:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:33:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:33:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:33:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:33:07,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:33:08,376 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:33:08,377 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:33:08,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:33:08 BoogieIcfgContainer [2020-10-12 19:33:08,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:33:08,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:33:08,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:33:08,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:33:08,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:33:07" (1/3) ... [2020-10-12 19:33:08,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfcfecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:33:08, skipping insertion in model container [2020-10-12 19:33:08,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:07" (2/3) ... [2020-10-12 19:33:08,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfcfecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:33:08, skipping insertion in model container [2020-10-12 19:33:08,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:33:08" (3/3) ... [2020-10-12 19:33:08,391 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-12 19:33:08,402 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:33:08,411 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:33:08,425 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:33:08,451 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:33:08,452 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:33:08,452 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:33:08,452 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:33:08,452 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:33:08,453 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:33:08,453 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:33:08,453 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:33:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-10-12 19:33:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 19:33:08,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:08,486 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:08,486 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:08,493 INFO L82 PathProgramCache]: Analyzing trace with hash 542345027, now seen corresponding path program 1 times [2020-10-12 19:33:08,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:08,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583840611] [2020-10-12 19:33:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:08,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:09,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:09,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:09,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:11,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:11,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 19:33:11,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:33:11,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2928 [2020-10-12 19:33:11,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:11,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:11,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:33:11,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 19:33:11,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:33:12,054 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:33:12,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:12,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:12,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:12,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:12,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:12,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:33:12,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:12,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:12,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:33:12,113 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 19:33:12,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583840611] [2020-10-12 19:33:12,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:12,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:33:12,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246548241] [2020-10-12 19:33:12,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:12,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:12,140 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 7 states. [2020-10-12 19:33:12,349 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 19:33:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:13,038 INFO L93 Difference]: Finished difference Result 516 states and 810 transitions. [2020-10-12 19:33:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:33:13,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-12 19:33:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:13,058 INFO L225 Difference]: With dead ends: 516 [2020-10-12 19:33:13,058 INFO L226 Difference]: Without dead ends: 430 [2020-10-12 19:33:13,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:33:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-12 19:33:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 128. [2020-10-12 19:33:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 19:33:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2020-10-12 19:33:13,130 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 51 [2020-10-12 19:33:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:13,131 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2020-10-12 19:33:13,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2020-10-12 19:33:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:33:13,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:13,134 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:13,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:33:13,135 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash 386332930, now seen corresponding path program 1 times [2020-10-12 19:33:13,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:13,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182175041] [2020-10-12 19:33:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:13,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:13,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:13,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:13,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:13,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:14,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:14,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:18,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:18,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:33:18,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:33:18,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:33:18,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:18,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:18,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:18,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:33:18,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:18,432 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:33:18,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:18,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:18,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:18,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:18,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:18,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 19:33:18,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:18,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:18,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:18,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:18,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:33:18,503 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 19:33:18,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182175041] [2020-10-12 19:33:18,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:18,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:33:18,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618477458] [2020-10-12 19:33:18,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:18,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:18,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:18,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:18,510 INFO L87 Difference]: Start difference. First operand 128 states and 185 transitions. Second operand 7 states. [2020-10-12 19:33:18,725 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-12 19:33:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:19,188 INFO L93 Difference]: Finished difference Result 377 states and 576 transitions. [2020-10-12 19:33:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:33:19,189 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-12 19:33:19,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:19,192 INFO L225 Difference]: With dead ends: 377 [2020-10-12 19:33:19,192 INFO L226 Difference]: Without dead ends: 279 [2020-10-12 19:33:19,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:33:19,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-12 19:33:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 131. [2020-10-12 19:33:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 19:33:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 189 transitions. [2020-10-12 19:33:19,230 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 189 transitions. Word has length 53 [2020-10-12 19:33:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:19,231 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 189 transitions. [2020-10-12 19:33:19,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 189 transitions. [2020-10-12 19:33:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:33:19,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:19,241 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:19,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:33:19,241 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:19,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1623750642, now seen corresponding path program 1 times [2020-10-12 19:33:19,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:19,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344753555] [2020-10-12 19:33:19,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:19,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:19,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:19,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:19,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:19,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:19,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:20,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:24,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:24,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:33:24,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:33:24,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:33:24,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:24,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:24,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:24,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 19:33:24,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:24,548 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:33:24,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:24,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:24,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:24,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:24,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:24,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:33:24,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:24,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:24,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:24,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:24,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:24,588 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 19:33:24,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344753555] [2020-10-12 19:33:24,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:24,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:33:24,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441507622] [2020-10-12 19:33:24,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:24,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:24,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:24,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:24,590 INFO L87 Difference]: Start difference. First operand 131 states and 189 transitions. Second operand 7 states. [2020-10-12 19:33:24,740 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-12 19:33:25,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:25,251 INFO L93 Difference]: Finished difference Result 363 states and 551 transitions. [2020-10-12 19:33:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:33:25,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-12 19:33:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:25,254 INFO L225 Difference]: With dead ends: 363 [2020-10-12 19:33:25,254 INFO L226 Difference]: Without dead ends: 265 [2020-10-12 19:33:25,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:33:25,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-12 19:33:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 153. [2020-10-12 19:33:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 19:33:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 221 transitions. [2020-10-12 19:33:25,288 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 221 transitions. Word has length 53 [2020-10-12 19:33:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:25,291 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 221 transitions. [2020-10-12 19:33:25,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 221 transitions. [2020-10-12 19:33:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:33:25,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:25,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:25,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:33:25,297 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:25,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1600005420, now seen corresponding path program 1 times [2020-10-12 19:33:25,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:25,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577976984] [2020-10-12 19:33:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:25,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:25,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:25,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:25,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:25,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:26,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:29,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:29,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:33:29,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:33:29,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4479 [2020-10-12 19:33:29,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:29,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:29,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:33:29,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:33:29,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:33:29,977 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:33:29,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:29,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:29,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:29,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:29,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:29,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:33:29,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:29,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:29,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:29,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:29,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:30,003 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 19:33:30,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577976984] [2020-10-12 19:33:30,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:30,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:33:30,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638352699] [2020-10-12 19:33:30,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:30,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:30,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:30,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:30,006 INFO L87 Difference]: Start difference. First operand 153 states and 221 transitions. Second operand 7 states. [2020-10-12 19:33:30,175 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 19:33:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:30,557 INFO L93 Difference]: Finished difference Result 683 states and 1054 transitions. [2020-10-12 19:33:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:33:30,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-12 19:33:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:30,561 INFO L225 Difference]: With dead ends: 683 [2020-10-12 19:33:30,562 INFO L226 Difference]: Without dead ends: 585 [2020-10-12 19:33:30,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:33:30,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-10-12 19:33:30,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 293. [2020-10-12 19:33:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-12 19:33:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 443 transitions. [2020-10-12 19:33:30,619 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 443 transitions. Word has length 53 [2020-10-12 19:33:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:30,620 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 443 transitions. [2020-10-12 19:33:30,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 443 transitions. [2020-10-12 19:33:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:33:30,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:30,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:30,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:33:30,625 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:30,625 INFO L82 PathProgramCache]: Analyzing trace with hash 629384701, now seen corresponding path program 1 times [2020-10-12 19:33:30,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:30,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130236076] [2020-10-12 19:33:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:30,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:30,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:30,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:30,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:30,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:31,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:31,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:33:31,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:33:31,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1311 [2020-10-12 19:33:31,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:31,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:33:31,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:33:31,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:33:32,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:32,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:32,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:32,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:32,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:32,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:33:32,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:32,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:32,195 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 19:33:32,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130236076] [2020-10-12 19:33:32,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:32,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:33:32,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503970900] [2020-10-12 19:33:32,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:32,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:32,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:32,197 INFO L87 Difference]: Start difference. First operand 293 states and 443 transitions. Second operand 7 states. [2020-10-12 19:33:32,379 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 19:33:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:32,799 INFO L93 Difference]: Finished difference Result 825 states and 1273 transitions. [2020-10-12 19:33:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:33:32,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-12 19:33:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:32,803 INFO L225 Difference]: With dead ends: 825 [2020-10-12 19:33:32,803 INFO L226 Difference]: Without dead ends: 587 [2020-10-12 19:33:32,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:33:32,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-12 19:33:32,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 293. [2020-10-12 19:33:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-12 19:33:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 441 transitions. [2020-10-12 19:33:32,837 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 441 transitions. Word has length 53 [2020-10-12 19:33:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:32,837 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 441 transitions. [2020-10-12 19:33:32,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 441 transitions. [2020-10-12 19:33:32,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:33:32,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:32,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:32,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:33:32,839 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:32,839 INFO L82 PathProgramCache]: Analyzing trace with hash 609335358, now seen corresponding path program 1 times [2020-10-12 19:33:32,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:32,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407925641] [2020-10-12 19:33:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:32,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:32,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:32,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:32,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:33,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:33,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:33,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:34,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:34,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:33:34,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:33:34,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1393 [2020-10-12 19:33:34,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:34,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:33:34,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 19:33:34,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:33:34,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:34,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:34,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:34,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:34,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:34,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:34,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:33:34,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:34,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:34,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:34,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:34,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:34,402 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 19:33:34,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407925641] [2020-10-12 19:33:34,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:34,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:33:34,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182097028] [2020-10-12 19:33:34,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:33:34,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:34,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:33:34,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:33:34,405 INFO L87 Difference]: Start difference. First operand 293 states and 441 transitions. Second operand 5 states. [2020-10-12 19:33:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:34,829 INFO L93 Difference]: Finished difference Result 529 states and 807 transitions. [2020-10-12 19:33:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:33:34,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-10-12 19:33:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:34,833 INFO L225 Difference]: With dead ends: 529 [2020-10-12 19:33:34,833 INFO L226 Difference]: Without dead ends: 527 [2020-10-12 19:33:34,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:33:34,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-10-12 19:33:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 301. [2020-10-12 19:33:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-12 19:33:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 449 transitions. [2020-10-12 19:33:34,877 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 449 transitions. Word has length 53 [2020-10-12 19:33:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:34,877 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 449 transitions. [2020-10-12 19:33:34,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:33:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 449 transitions. [2020-10-12 19:33:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:33:34,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:34,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:34,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:33:34,879 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1996276536, now seen corresponding path program 1 times [2020-10-12 19:33:34,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:34,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675879870] [2020-10-12 19:33:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:34,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:34,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:34,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:34,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:35,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:35,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:36,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:38,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:38,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:33:38,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:33:38,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3589 [2020-10-12 19:33:38,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:38,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:38,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:33:38,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:33:38,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:38,662 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:33:38,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:38,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:38,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:38,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:38,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:33:38,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:38,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:38,694 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 19:33:38,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675879870] [2020-10-12 19:33:38,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:38,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:33:38,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077508826] [2020-10-12 19:33:38,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:38,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:38,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:38,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:38,698 INFO L87 Difference]: Start difference. First operand 301 states and 449 transitions. Second operand 7 states. [2020-10-12 19:33:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:39,391 INFO L93 Difference]: Finished difference Result 940 states and 1431 transitions. [2020-10-12 19:33:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:33:39,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-12 19:33:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:39,397 INFO L225 Difference]: With dead ends: 940 [2020-10-12 19:33:39,397 INFO L226 Difference]: Without dead ends: 794 [2020-10-12 19:33:39,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:33:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-10-12 19:33:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 451. [2020-10-12 19:33:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-12 19:33:39,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 682 transitions. [2020-10-12 19:33:39,457 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 682 transitions. Word has length 53 [2020-10-12 19:33:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:39,457 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 682 transitions. [2020-10-12 19:33:39,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 682 transitions. [2020-10-12 19:33:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:33:39,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:39,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:39,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:33:39,459 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:39,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1719146645, now seen corresponding path program 1 times [2020-10-12 19:33:39,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:39,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250774699] [2020-10-12 19:33:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:39,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:39,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:39,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:39,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:39,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:39,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:40,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:40,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:33:40,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:33:40,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-12 19:33:40,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:40,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:33:40,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:33:40,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 19:33:40,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:40,265 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:33:40,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:40,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:40,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:40,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:40,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:40,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:33:40,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:40,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:40,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:40,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:40,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:33:40,303 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 19:33:40,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250774699] [2020-10-12 19:33:40,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:40,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:33:40,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830004453] [2020-10-12 19:33:40,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:33:40,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:40,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:33:40,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:33:40,313 INFO L87 Difference]: Start difference. First operand 451 states and 682 transitions. Second operand 5 states. [2020-10-12 19:33:40,509 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 19:33:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:41,125 INFO L93 Difference]: Finished difference Result 1576 states and 2431 transitions. [2020-10-12 19:33:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:33:41,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-10-12 19:33:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:41,132 INFO L225 Difference]: With dead ends: 1576 [2020-10-12 19:33:41,132 INFO L226 Difference]: Without dead ends: 1180 [2020-10-12 19:33:41,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:33:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2020-10-12 19:33:41,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1176. [2020-10-12 19:33:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1176 states. [2020-10-12 19:33:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1791 transitions. [2020-10-12 19:33:41,286 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1791 transitions. Word has length 54 [2020-10-12 19:33:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:41,286 INFO L479 AbstractCegarLoop]: Abstraction has 1176 states and 1791 transitions. [2020-10-12 19:33:41,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:33:41,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1791 transitions. [2020-10-12 19:33:41,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:33:41,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:41,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:41,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:33:41,288 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:41,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:41,289 INFO L82 PathProgramCache]: Analyzing trace with hash -880060082, now seen corresponding path program 1 times [2020-10-12 19:33:41,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:41,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475051890] [2020-10-12 19:33:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:41,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:41,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:41,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:41,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:41,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:41,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:42,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:33:42,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:33:42,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-10-12 19:33:42,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:42,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:42,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:42,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:33:42,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:42,701 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:33:42,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:42,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:42,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:42,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:42,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 19:33:42,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:42,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:42,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:33:42,760 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 19:33:42,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475051890] [2020-10-12 19:33:42,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:42,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:33:42,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440725232] [2020-10-12 19:33:42,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:42,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:42,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:42,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:42,763 INFO L87 Difference]: Start difference. First operand 1176 states and 1791 transitions. Second operand 7 states. [2020-10-12 19:33:42,935 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-12 19:33:43,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:43,877 INFO L93 Difference]: Finished difference Result 3264 states and 4951 transitions. [2020-10-12 19:33:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:33:43,878 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-12 19:33:43,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:43,890 INFO L225 Difference]: With dead ends: 3264 [2020-10-12 19:33:43,890 INFO L226 Difference]: Without dead ends: 2160 [2020-10-12 19:33:43,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:33:43,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2020-10-12 19:33:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1208. [2020-10-12 19:33:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2020-10-12 19:33:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1835 transitions. [2020-10-12 19:33:44,081 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1835 transitions. Word has length 55 [2020-10-12 19:33:44,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:44,081 INFO L479 AbstractCegarLoop]: Abstraction has 1208 states and 1835 transitions. [2020-10-12 19:33:44,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1835 transitions. [2020-10-12 19:33:44,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:33:44,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:44,082 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:44,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:33:44,083 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:44,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:44,083 INFO L82 PathProgramCache]: Analyzing trace with hash 555486786, now seen corresponding path program 1 times [2020-10-12 19:33:44,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:44,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136418098] [2020-10-12 19:33:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:44,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:44,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:44,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:44,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:44,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:44,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:45,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:45,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:33:45,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:33:45,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1351 [2020-10-12 19:33:45,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:45,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:45,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:45,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 19:33:45,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:45,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:45,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:45,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:45,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:45,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:45,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 19:33:45,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:45,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:45,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:45,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:45,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:33:45,656 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 19:33:45,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136418098] [2020-10-12 19:33:45,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:45,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:33:45,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760742693] [2020-10-12 19:33:45,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:45,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:45,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:45,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:45,658 INFO L87 Difference]: Start difference. First operand 1208 states and 1835 transitions. Second operand 7 states. [2020-10-12 19:33:45,812 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-12 19:33:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:46,627 INFO L93 Difference]: Finished difference Result 3752 states and 5723 transitions. [2020-10-12 19:33:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:33:46,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-12 19:33:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:46,640 INFO L225 Difference]: With dead ends: 3752 [2020-10-12 19:33:46,640 INFO L226 Difference]: Without dead ends: 2596 [2020-10-12 19:33:46,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:33:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2020-10-12 19:33:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1180. [2020-10-12 19:33:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2020-10-12 19:33:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1793 transitions. [2020-10-12 19:33:46,815 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1793 transitions. Word has length 55 [2020-10-12 19:33:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:46,815 INFO L479 AbstractCegarLoop]: Abstraction has 1180 states and 1793 transitions. [2020-10-12 19:33:46,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1793 transitions. [2020-10-12 19:33:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 19:33:46,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:46,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:46,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:33:46,817 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:46,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:46,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1106874820, now seen corresponding path program 1 times [2020-10-12 19:33:46,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:46,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379806547] [2020-10-12 19:33:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:46,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:46,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:46,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:46,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:47,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:47,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:47,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:49,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:51,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:51,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 19:33:51,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:33:51,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:33:51,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:51,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:33:51,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:51,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 19:33:51,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:52,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:52,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:52,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:52,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:52,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:52,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:33:52,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:52,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:52,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:52,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:52,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:52,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379806547] [2020-10-12 19:33:52,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:33:52,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:33:52,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47059694] [2020-10-12 19:33:52,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:33:52,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:33:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:33:52,111 INFO L87 Difference]: Start difference. First operand 1180 states and 1793 transitions. Second operand 8 states. [2020-10-12 19:33:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:53,143 INFO L93 Difference]: Finished difference Result 4168 states and 6301 transitions. [2020-10-12 19:33:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:33:53,143 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-10-12 19:33:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:53,163 INFO L225 Difference]: With dead ends: 4168 [2020-10-12 19:33:53,164 INFO L226 Difference]: Without dead ends: 3064 [2020-10-12 19:33:53,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:33:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2020-10-12 19:33:53,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1418. [2020-10-12 19:33:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1418 states. [2020-10-12 19:33:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 2076 transitions. [2020-10-12 19:33:53,402 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 2076 transitions. Word has length 76 [2020-10-12 19:33:53,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:53,402 INFO L479 AbstractCegarLoop]: Abstraction has 1418 states and 2076 transitions. [2020-10-12 19:33:53,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:33:53,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 2076 transitions. [2020-10-12 19:33:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 19:33:53,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:53,406 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:53,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:33:53,407 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:53,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1178008904, now seen corresponding path program 1 times [2020-10-12 19:33:53,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:53,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236817721] [2020-10-12 19:33:53,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:53,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:58,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:58,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 19:33:58,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:33:58,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:33:58,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:58,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:33:58,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:58,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 19:33:58,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:58,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:58,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:58,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:58,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:58,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:58,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:33:58,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:58,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:58,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:58,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:58,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:58,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236817721] [2020-10-12 19:33:58,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:33:58,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:33:58,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148275809] [2020-10-12 19:33:58,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:33:58,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:58,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:33:58,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:33:58,681 INFO L87 Difference]: Start difference. First operand 1418 states and 2076 transitions. Second operand 8 states. [2020-10-12 19:33:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:59,994 INFO L93 Difference]: Finished difference Result 7410 states and 10792 transitions. [2020-10-12 19:33:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:33:59,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-10-12 19:33:59,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:00,024 INFO L225 Difference]: With dead ends: 7410 [2020-10-12 19:34:00,025 INFO L226 Difference]: Without dead ends: 6042 [2020-10-12 19:34:00,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:34:00,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2020-10-12 19:34:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 2924. [2020-10-12 19:34:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2924 states. [2020-10-12 19:34:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 4230 transitions. [2020-10-12 19:34:00,467 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 4230 transitions. Word has length 76 [2020-10-12 19:34:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:00,467 INFO L479 AbstractCegarLoop]: Abstraction has 2924 states and 4230 transitions. [2020-10-12 19:34:00,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:34:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 4230 transitions. [2020-10-12 19:34:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 19:34:00,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:00,470 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 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 19:34:00,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:34:00,471 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:00,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1555470775, now seen corresponding path program 1 times [2020-10-12 19:34:00,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:00,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763762100] [2020-10-12 19:34:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:00,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:00,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:00,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:00,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:00,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:00,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:00,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:01,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:01,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:01,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:05,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:05,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 19:34:05,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:34:05,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:34:05,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:05,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:34:05,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:34:05,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 19:34:05,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:05,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:05,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:05,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:05,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:05,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:05,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:34:05,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:05,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:34:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:34:05,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:05,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763762100] [2020-10-12 19:34:05,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:34:05,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:34:05,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575781149] [2020-10-12 19:34:05,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:34:05,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:05,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:34:05,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:34:05,749 INFO L87 Difference]: Start difference. First operand 2924 states and 4230 transitions. Second operand 12 states. [2020-10-12 19:34:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:09,904 INFO L93 Difference]: Finished difference Result 23666 states and 33777 transitions. [2020-10-12 19:34:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 19:34:09,904 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-10-12 19:34:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:09,981 INFO L225 Difference]: With dead ends: 23666 [2020-10-12 19:34:09,982 INFO L226 Difference]: Without dead ends: 22976 [2020-10-12 19:34:09,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 19:34:10,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22976 states. [2020-10-12 19:34:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22976 to 10568. [2020-10-12 19:34:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10568 states. [2020-10-12 19:34:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10568 states to 10568 states and 15412 transitions. [2020-10-12 19:34:11,292 INFO L78 Accepts]: Start accepts. Automaton has 10568 states and 15412 transitions. Word has length 77 [2020-10-12 19:34:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:11,293 INFO L479 AbstractCegarLoop]: Abstraction has 10568 states and 15412 transitions. [2020-10-12 19:34:11,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:34:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 10568 states and 15412 transitions. [2020-10-12 19:34:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 19:34:11,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:11,298 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 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 19:34:11,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:34:11,298 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:11,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1018165646, now seen corresponding path program 1 times [2020-10-12 19:34:11,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:11,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879680024] [2020-10-12 19:34:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:11,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:11,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:11,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:11,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:11,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:11,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:12,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:14,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:14,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:16,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:16,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 19:34:16,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:34:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:34:16,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:34:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:34:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:34:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:16,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:16,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:16,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:16,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:16,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:16,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:34:16,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:16,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:16,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879680024] [2020-10-12 19:34:16,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:34:16,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:34:16,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930354985] [2020-10-12 19:34:16,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:34:16,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:16,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:34:16,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:34:16,726 INFO L87 Difference]: Start difference. First operand 10568 states and 15412 transitions. Second operand 10 states. [2020-10-12 19:34:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:21,419 INFO L93 Difference]: Finished difference Result 33562 states and 48572 transitions. [2020-10-12 19:34:21,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 19:34:21,419 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-10-12 19:34:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:21,489 INFO L225 Difference]: With dead ends: 33562 [2020-10-12 19:34:21,489 INFO L226 Difference]: Without dead ends: 31010 [2020-10-12 19:34:21,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-10-12 19:34:21,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31010 states. [2020-10-12 19:34:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31010 to 16072. [2020-10-12 19:34:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16072 states. [2020-10-12 19:34:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16072 states to 16072 states and 23372 transitions. [2020-10-12 19:34:23,535 INFO L78 Accepts]: Start accepts. Automaton has 16072 states and 23372 transitions. Word has length 77 [2020-10-12 19:34:23,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:23,536 INFO L479 AbstractCegarLoop]: Abstraction has 16072 states and 23372 transitions. [2020-10-12 19:34:23,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:34:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 16072 states and 23372 transitions. [2020-10-12 19:34:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 19:34:23,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:23,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:34:23,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:34:23,540 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:23,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:23,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1620620645, now seen corresponding path program 1 times [2020-10-12 19:34:23,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:23,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554215625] [2020-10-12 19:34:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:23,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:23,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:23,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:23,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:23,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:24,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:24,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:27,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:27,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:28,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:28,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 19:34:28,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:34:28,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:34:28,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:28,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:34:28,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:34:28,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 19:34:28,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:28,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:28,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:28,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:28,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:28,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:28,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:34:28,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:28,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:28,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:28,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:28,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:28,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554215625] [2020-10-12 19:34:28,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:34:28,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 19:34:28,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352913778] [2020-10-12 19:34:28,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:34:28,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:28,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:34:28,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:34:28,762 INFO L87 Difference]: Start difference. First operand 16072 states and 23372 transitions. Second operand 6 states. [2020-10-12 19:34:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:31,532 INFO L93 Difference]: Finished difference Result 27192 states and 39864 transitions. [2020-10-12 19:34:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:34:31,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-12 19:34:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:31,574 INFO L225 Difference]: With dead ends: 27192 [2020-10-12 19:34:31,574 INFO L226 Difference]: Without dead ends: 21370 [2020-10-12 19:34:31,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:34:31,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21370 states. [2020-10-12 19:34:34,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21370 to 21364. [2020-10-12 19:34:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21364 states. [2020-10-12 19:34:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21364 states to 21364 states and 31000 transitions. [2020-10-12 19:34:34,124 INFO L78 Accepts]: Start accepts. Automaton has 21364 states and 31000 transitions. Word has length 77 [2020-10-12 19:34:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:34,124 INFO L479 AbstractCegarLoop]: Abstraction has 21364 states and 31000 transitions. [2020-10-12 19:34:34,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:34:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 21364 states and 31000 transitions. [2020-10-12 19:34:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 19:34:34,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:34,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 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 19:34:34,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:34:34,129 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:34,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:34,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1087780823, now seen corresponding path program 1 times [2020-10-12 19:34:34,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:34,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532313214] [2020-10-12 19:34:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:34,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:34,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:34,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:34,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:34,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:34,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:34,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:34,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:34,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:35,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:35,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:39,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:39,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 19:34:39,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:34:39,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:34:39,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:39,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:34:39,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:34:39,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 19:34:39,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:39,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:39,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:39,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:39,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:39,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:39,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:34:39,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:39,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:34:39,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:39,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:34:39,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:39,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532313214] [2020-10-12 19:34:39,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:34:39,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:34:39,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673011035] [2020-10-12 19:34:39,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:34:39,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:39,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:34:39,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:34:39,509 INFO L87 Difference]: Start difference. First operand 21364 states and 31000 transitions. Second operand 12 states. [2020-10-12 19:35:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:05,689 INFO L93 Difference]: Finished difference Result 206032 states and 295966 transitions. [2020-10-12 19:35:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 19:35:05,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-10-12 19:35:05,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:06,054 INFO L225 Difference]: With dead ends: 206032 [2020-10-12 19:35:06,054 INFO L226 Difference]: Without dead ends: 198254 [2020-10-12 19:35:06,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 19:35:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198254 states. [2020-10-12 19:35:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198254 to 75892. [2020-10-12 19:35:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75892 states. [2020-10-12 19:35:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75892 states to 75892 states and 110147 transitions. [2020-10-12 19:35:18,458 INFO L78 Accepts]: Start accepts. Automaton has 75892 states and 110147 transitions. Word has length 77 [2020-10-12 19:35:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:18,458 INFO L479 AbstractCegarLoop]: Abstraction has 75892 states and 110147 transitions. [2020-10-12 19:35:18,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:35:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 75892 states and 110147 transitions. [2020-10-12 19:35:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 19:35:18,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:18,467 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 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 19:35:18,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:35:18,467 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:18,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:18,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1449899548, now seen corresponding path program 1 times [2020-10-12 19:35:18,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:18,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535892805] [2020-10-12 19:35:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:18,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:18,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:18,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:18,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:18,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:19,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:19,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:20,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:23,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:23,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 19:35:23,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:35:23,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:35:23,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:23,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:35:23,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:35:23,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 19:35:23,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:23,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:23,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:23,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:23,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:23,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:23,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:35:23,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:23,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:23,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:23,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:23,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:23,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535892805] [2020-10-12 19:35:23,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:35:23,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:35:23,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3671960] [2020-10-12 19:35:23,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:35:23,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:23,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:35:23,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:35:23,812 INFO L87 Difference]: Start difference. First operand 75892 states and 110147 transitions. Second operand 10 states. [2020-10-12 19:35:23,960 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-12 19:36:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:02,932 INFO L93 Difference]: Finished difference Result 281824 states and 403625 transitions. [2020-10-12 19:36:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:36:02,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-10-12 19:36:02,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:03,253 INFO L225 Difference]: With dead ends: 281824 [2020-10-12 19:36:03,253 INFO L226 Difference]: Without dead ends: 254102 [2020-10-12 19:36:03,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:36:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254102 states. [2020-10-12 19:36:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254102 to 118420. [2020-10-12 19:36:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118420 states. [2020-10-12 19:36:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118420 states to 118420 states and 171327 transitions. [2020-10-12 19:36:24,056 INFO L78 Accepts]: Start accepts. Automaton has 118420 states and 171327 transitions. Word has length 77 [2020-10-12 19:36:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:24,056 INFO L479 AbstractCegarLoop]: Abstraction has 118420 states and 171327 transitions. [2020-10-12 19:36:24,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:36:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 118420 states and 171327 transitions. [2020-10-12 19:36:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 19:36:24,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:24,062 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:24,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:36:24,063 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:24,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1333630968, now seen corresponding path program 1 times [2020-10-12 19:36:24,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:24,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424377205] [2020-10-12 19:36:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:24,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:24,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:24,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:24,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:24,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:24,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:24,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:24,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:24,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:24,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:29,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:29,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 19:36:29,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:36:29,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:36:29,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:29,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:36:29,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:36:29,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 19:36:29,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:29,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:29,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:29,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:29,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:29,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:36:29,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:29,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:36:29,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:29,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:36:29,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:29,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424377205] [2020-10-12 19:36:29,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:36:29,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:36:29,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132204113] [2020-10-12 19:36:29,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:36:29,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:29,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:36:29,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:36:29,264 INFO L87 Difference]: Start difference. First operand 118420 states and 171327 transitions. Second operand 8 states. [2020-10-12 19:36:29,412 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 114