/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:25:37,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:25:37,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:25:37,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:25:37,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:25:37,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:25:37,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:25:37,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:25:37,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:25:37,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:25:37,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:25:37,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:25:37,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:25:37,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:25:37,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:25:37,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:25:37,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:25:37,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:25:37,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:25:37,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:25:37,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:25:37,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:25:37,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:25:37,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:25:37,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:25:37,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:25:37,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:25:37,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:25:37,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:25:37,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:25:37,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:25:37,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:25:37,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:25:37,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:25:37,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:25:37,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:25:37,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:25:37,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:25:37,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:25:37,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:25:37,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:25:37,897 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 [2020-10-14 09:25:37,940 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:25:37,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:25:37,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:25:37,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:25:37,945 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:25:37,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:25:37,946 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:25:37,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:25:37,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:25:37,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:25:37,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:25:37,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:25:37,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:25:37,947 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:25:37,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:25:37,947 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:25:37,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:25:37,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:25:37,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:25:37,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:25:37,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:25:37,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:25:37,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:25:37,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:25:37,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:25:37,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:25:37,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:25:37,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:25:37,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:25:37,952 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:25:38,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:25:38,256 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:25:38,260 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:25:38,261 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:25:38,261 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:25:38,262 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:25:38,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a61c4e98/73769f74b2c94221a4fbb1b1bcb11ef2/FLAG6cf14d196 [2020-10-14 09:25:38,813 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:25:38,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:25:38,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a61c4e98/73769f74b2c94221a4fbb1b1bcb11ef2/FLAG6cf14d196 [2020-10-14 09:25:39,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a61c4e98/73769f74b2c94221a4fbb1b1bcb11ef2 [2020-10-14 09:25:39,192 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:25:39,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:25:39,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:25:39,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:25:39,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:25:39,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:25:39" (1/1) ... [2020-10-14 09:25:39,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e093328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:39, skipping insertion in model container [2020-10-14 09:25:39,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:25:39" (1/1) ... [2020-10-14 09:25:39,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:25:39,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:25:39,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:25:39,674 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:25:39,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:25:39,776 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:25:39,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:39 WrapperNode [2020-10-14 09:25:39,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:25:39,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:25:39,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:25:39,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:25:39,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:39" (1/1) ... [2020-10-14 09:25:39,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:39" (1/1) ... [2020-10-14 09:25:39,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:39" (1/1) ... [2020-10-14 09:25:39,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:39" (1/1) ... [2020-10-14 09:25:39,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:39" (1/1) ... [2020-10-14 09:25:39,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:39" (1/1) ... [2020-10-14 09:25:39,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:39" (1/1) ... [2020-10-14 09:25:39,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:25:39,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:25:39,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:25:39,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:25:39,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:25:39,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:25:39,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:25:39,896 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:25:39,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:25:39,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:25:39,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:25:39,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 09:25:39,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:25:39,897 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:25:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:25:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:25:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:25:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:25:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:25:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:25:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:25:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:25:39,904 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:25:39,904 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:25:39,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:25:39,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:25:40,632 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:25:40,633 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:25:40,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:25:40 BoogieIcfgContainer [2020-10-14 09:25:40,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:25:40,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:25:40,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:25:40,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:25:40,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:25:39" (1/3) ... [2020-10-14 09:25:40,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768e04ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:25:40, skipping insertion in model container [2020-10-14 09:25:40,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:39" (2/3) ... [2020-10-14 09:25:40,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768e04ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:25:40, skipping insertion in model container [2020-10-14 09:25:40,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:25:40" (3/3) ... [2020-10-14 09:25:40,647 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:25:40,658 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:25:40,665 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:25:40,679 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:25:40,705 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:25:40,706 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:25:40,706 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:25:40,706 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:25:40,706 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:25:40,707 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:25:40,707 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:25:40,707 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:25:40,729 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-10-14 09:25:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:25:40,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:40,742 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:40,742 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1725986399, now seen corresponding path program 1 times [2020-10-14 09:25:40,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:40,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937084276] [2020-10-14 09:25:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:41,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:41,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:41,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:41,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:43,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:43,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:25:43,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:25:43,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2256 [2020-10-14 09:25:43,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:43,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:43,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:43,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 09:25:43,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:25:43,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:25:43,671 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:43,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:43,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:43,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:43,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:43,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 09:25:43,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:43,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:43,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:43,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:43,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937084276] [2020-10-14 09:25:43,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:43,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:43,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151334409] [2020-10-14 09:25:43,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:43,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:43,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:43,780 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 4 states. [2020-10-14 09:25:44,169 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:25:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:45,021 INFO L93 Difference]: Finished difference Result 350 states and 582 transitions. [2020-10-14 09:25:45,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:45,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-14 09:25:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:45,038 INFO L225 Difference]: With dead ends: 350 [2020-10-14 09:25:45,038 INFO L226 Difference]: Without dead ends: 243 [2020-10-14 09:25:45,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-14 09:25:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2020-10-14 09:25:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-14 09:25:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 377 transitions. [2020-10-14 09:25:45,112 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 377 transitions. Word has length 66 [2020-10-14 09:25:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:45,112 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 377 transitions. [2020-10-14 09:25:45,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 377 transitions. [2020-10-14 09:25:45,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:25:45,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:45,116 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:45,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:25:45,116 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:45,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:45,117 INFO L82 PathProgramCache]: Analyzing trace with hash 27567360, now seen corresponding path program 1 times [2020-10-14 09:25:45,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:45,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561949488] [2020-10-14 09:25:45,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:45,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:45,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:45,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:45,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:45,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:49,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:49,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:25:49,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:25:49,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4129 [2020-10-14 09:25:49,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:49,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:49,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:49,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 09:25:49,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:25:49,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 25 [2020-10-14 09:25:49,639 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:49,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:49,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:49,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:49,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:49,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:49,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 09:25:49,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:49,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:49,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:49,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:49,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:49,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:49,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561949488] [2020-10-14 09:25:49,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:49,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:49,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535550607] [2020-10-14 09:25:49,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:49,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:49,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:49,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:49,713 INFO L87 Difference]: Start difference. First operand 240 states and 377 transitions. Second operand 4 states. [2020-10-14 09:25:49,953 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:25:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:50,650 INFO L93 Difference]: Finished difference Result 582 states and 945 transitions. [2020-10-14 09:25:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:50,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 09:25:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:50,654 INFO L225 Difference]: With dead ends: 582 [2020-10-14 09:25:50,655 INFO L226 Difference]: Without dead ends: 403 [2020-10-14 09:25:50,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-14 09:25:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 399. [2020-10-14 09:25:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-14 09:25:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 640 transitions. [2020-10-14 09:25:50,687 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 640 transitions. Word has length 68 [2020-10-14 09:25:50,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:50,688 INFO L479 AbstractCegarLoop]: Abstraction has 399 states and 640 transitions. [2020-10-14 09:25:50,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:50,688 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 640 transitions. [2020-10-14 09:25:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:25:50,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:50,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:50,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:25:50,692 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:50,692 INFO L82 PathProgramCache]: Analyzing trace with hash -114533023, now seen corresponding path program 1 times [2020-10-14 09:25:50,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:50,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010595214] [2020-10-14 09:25:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:50,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:51,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:52,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:52,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:55,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:55,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:25:55,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:25:55,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:25:55,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:55,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:55,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:55,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 09:25:55,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:25:55,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:55,987 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:55,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:56,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:56,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:56,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:56,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:56,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:25:56,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:56,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:56,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:56,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010595214] [2020-10-14 09:25:56,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:56,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:56,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693351019] [2020-10-14 09:25:56,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:56,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:56,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:56,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:56,032 INFO L87 Difference]: Start difference. First operand 399 states and 640 transitions. Second operand 4 states. [2020-10-14 09:25:56,285 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:25:56,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:56,894 INFO L93 Difference]: Finished difference Result 1035 states and 1690 transitions. [2020-10-14 09:25:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:56,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 09:25:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:56,900 INFO L225 Difference]: With dead ends: 1035 [2020-10-14 09:25:56,900 INFO L226 Difference]: Without dead ends: 697 [2020-10-14 09:25:56,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-10-14 09:25:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 691. [2020-10-14 09:25:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-10-14 09:25:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1100 transitions. [2020-10-14 09:25:56,951 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1100 transitions. Word has length 70 [2020-10-14 09:25:56,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:56,952 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 1100 transitions. [2020-10-14 09:25:56,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1100 transitions. [2020-10-14 09:25:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 09:25:56,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:56,963 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:56,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:25:56,964 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:56,967 INFO L82 PathProgramCache]: Analyzing trace with hash -851986110, now seen corresponding path program 1 times [2020-10-14 09:25:56,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:56,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091104206] [2020-10-14 09:25:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:57,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:57,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:57,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:57,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:57,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:00,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:02,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:02,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 09:26:02,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:02,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:26:02,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:02,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:26:02,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 09:26:02,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:26:02,415 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:02,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:02,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:02,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:02,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:02,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:02,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:26:02,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:02,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:02,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:02,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:02,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:02,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:02,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091104206] [2020-10-14 09:26:02,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:02,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:02,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039510226] [2020-10-14 09:26:02,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:02,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:02,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:02,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:02,469 INFO L87 Difference]: Start difference. First operand 691 states and 1100 transitions. Second operand 5 states. [2020-10-14 09:26:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:03,362 INFO L93 Difference]: Finished difference Result 1958 states and 3135 transitions. [2020-10-14 09:26:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:03,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-14 09:26:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:03,371 INFO L225 Difference]: With dead ends: 1958 [2020-10-14 09:26:03,371 INFO L226 Difference]: Without dead ends: 1328 [2020-10-14 09:26:03,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2020-10-14 09:26:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1326. [2020-10-14 09:26:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2020-10-14 09:26:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2101 transitions. [2020-10-14 09:26:03,457 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2101 transitions. Word has length 72 [2020-10-14 09:26:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:03,457 INFO L479 AbstractCegarLoop]: Abstraction has 1326 states and 2101 transitions. [2020-10-14 09:26:03,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2101 transitions. [2020-10-14 09:26:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:26:03,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:03,459 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:03,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:26:03,460 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:03,460 INFO L82 PathProgramCache]: Analyzing trace with hash -161796966, now seen corresponding path program 1 times [2020-10-14 09:26:03,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:03,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326522421] [2020-10-14 09:26:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:03,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:03,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:03,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:03,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:03,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:03,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:08,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:08,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:26:08,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:08,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 09:26:08,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:08,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:08,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:08,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 09:26:08,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 09:26:08,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:08,680 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:08,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:08,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:08,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:08,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:08,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:08,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:26:08,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:08,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:08,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:08,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326522421] [2020-10-14 09:26:08,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:08,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:08,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735634148] [2020-10-14 09:26:08,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:08,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:08,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:08,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:08,709 INFO L87 Difference]: Start difference. First operand 1326 states and 2101 transitions. Second operand 4 states. [2020-10-14 09:26:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:09,529 INFO L93 Difference]: Finished difference Result 3112 states and 4993 transitions. [2020-10-14 09:26:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:09,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:26:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:09,540 INFO L225 Difference]: With dead ends: 3112 [2020-10-14 09:26:09,540 INFO L226 Difference]: Without dead ends: 1898 [2020-10-14 09:26:09,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-10-14 09:26:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1840. [2020-10-14 09:26:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1840 states. [2020-10-14 09:26:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2915 transitions. [2020-10-14 09:26:09,663 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2915 transitions. Word has length 73 [2020-10-14 09:26:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:09,663 INFO L479 AbstractCegarLoop]: Abstraction has 1840 states and 2915 transitions. [2020-10-14 09:26:09,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2915 transitions. [2020-10-14 09:26:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:26:09,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:09,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:09,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:26:09,666 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:09,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:09,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1760328783, now seen corresponding path program 1 times [2020-10-14 09:26:09,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:09,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891022706] [2020-10-14 09:26:09,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:09,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:09,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:09,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:09,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:09,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:10,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:10,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:12,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:14,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:14,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:26:14,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:26:14,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:26:14,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:14,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:14,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:26:14,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:26:14,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:14,931 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:14,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:14,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:14,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:14,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:14,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:14,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:26:14,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:14,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:14,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:14,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:14,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:14,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:14,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891022706] [2020-10-14 09:26:14,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:14,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:14,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276932744] [2020-10-14 09:26:14,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:14,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:14,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:14,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:14,971 INFO L87 Difference]: Start difference. First operand 1840 states and 2915 transitions. Second operand 4 states. [2020-10-14 09:26:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:16,111 INFO L93 Difference]: Finished difference Result 5430 states and 8595 transitions. [2020-10-14 09:26:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:16,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:26:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:16,132 INFO L225 Difference]: With dead ends: 5430 [2020-10-14 09:26:16,132 INFO L226 Difference]: Without dead ends: 3638 [2020-10-14 09:26:16,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2020-10-14 09:26:16,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 1846. [2020-10-14 09:26:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1846 states. [2020-10-14 09:26:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2923 transitions. [2020-10-14 09:26:16,302 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2923 transitions. Word has length 73 [2020-10-14 09:26:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:16,302 INFO L479 AbstractCegarLoop]: Abstraction has 1846 states and 2923 transitions. [2020-10-14 09:26:16,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2923 transitions. [2020-10-14 09:26:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 09:26:16,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:16,309 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:16,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:26:16,310 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:16,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:16,310 INFO L82 PathProgramCache]: Analyzing trace with hash -170908733, now seen corresponding path program 1 times [2020-10-14 09:26:16,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:16,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676547213] [2020-10-14 09:26:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:16,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:16,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:16,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:16,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:16,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:17,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:17,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:21,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:21,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 09:26:21,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:21,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 09:26:21,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:21,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:21,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:21,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:26:21,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 09:26:21,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:21,648 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:21,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:21,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:21,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:21,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:21,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:21,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:26:21,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:21,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:21,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:21,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:21,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:21,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:21,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676547213] [2020-10-14 09:26:21,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:21,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:21,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669108625] [2020-10-14 09:26:21,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:21,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:21,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:21,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:21,703 INFO L87 Difference]: Start difference. First operand 1846 states and 2923 transitions. Second operand 5 states. [2020-10-14 09:26:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:22,922 INFO L93 Difference]: Finished difference Result 5273 states and 8379 transitions. [2020-10-14 09:26:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:22,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-14 09:26:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:22,939 INFO L225 Difference]: With dead ends: 5273 [2020-10-14 09:26:22,940 INFO L226 Difference]: Without dead ends: 3545 [2020-10-14 09:26:22,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:22,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3545 states. [2020-10-14 09:26:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3545 to 3543. [2020-10-14 09:26:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3543 states. [2020-10-14 09:26:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 5575 transitions. [2020-10-14 09:26:23,242 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 5575 transitions. Word has length 74 [2020-10-14 09:26:23,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:23,243 INFO L479 AbstractCegarLoop]: Abstraction has 3543 states and 5575 transitions. [2020-10-14 09:26:23,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:23,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 5575 transitions. [2020-10-14 09:26:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:26:23,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:23,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:23,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:26:23,247 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:23,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1977767504, now seen corresponding path program 1 times [2020-10-14 09:26:23,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:23,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923387798] [2020-10-14 09:26:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:23,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:23,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:23,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:23,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:23,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:24,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:24,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:26,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:28,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:28,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:26:28,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:26:28,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:26:28,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:28,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:26:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:26:28,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:28,473 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:28,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:28,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:28,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:28,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:28,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:28,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:26:28,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:28,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:28,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:28,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:28,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923387798] [2020-10-14 09:26:28,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:28,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:28,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723403849] [2020-10-14 09:26:28,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:28,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:28,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:28,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:28,517 INFO L87 Difference]: Start difference. First operand 3543 states and 5575 transitions. Second operand 4 states. [2020-10-14 09:26:29,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:29,601 INFO L93 Difference]: Finished difference Result 10547 states and 16589 transitions. [2020-10-14 09:26:29,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:29,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:26:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:29,656 INFO L225 Difference]: With dead ends: 10547 [2020-10-14 09:26:29,656 INFO L226 Difference]: Without dead ends: 7051 [2020-10-14 09:26:29,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2020-10-14 09:26:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 3555. [2020-10-14 09:26:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3555 states. [2020-10-14 09:26:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 5591 transitions. [2020-10-14 09:26:30,052 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 5591 transitions. Word has length 75 [2020-10-14 09:26:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:30,052 INFO L479 AbstractCegarLoop]: Abstraction has 3555 states and 5591 transitions. [2020-10-14 09:26:30,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 5591 transitions. [2020-10-14 09:26:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:26:30,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:30,057 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:30,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:26:30,058 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:30,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:30,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1894787855, now seen corresponding path program 1 times [2020-10-14 09:26:30,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:30,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213414501] [2020-10-14 09:26:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:30,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:30,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:30,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:30,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:30,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:30,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:32,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:35,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:35,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:26:35,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:35,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:26:35,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:35,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:35,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:35,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 09:26:35,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 09:26:35,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:35,275 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:35,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:35,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:35,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:35,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:35,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:35,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:26:35,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:35,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:35,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:35,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:35,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:35,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:35,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213414501] [2020-10-14 09:26:35,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:35,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:35,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015487445] [2020-10-14 09:26:35,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:35,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:35,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:35,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:35,305 INFO L87 Difference]: Start difference. First operand 3555 states and 5591 transitions. Second operand 4 states. [2020-10-14 09:26:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:36,216 INFO L93 Difference]: Finished difference Result 8431 states and 13393 transitions. [2020-10-14 09:26:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:36,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:26:36,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:36,242 INFO L225 Difference]: With dead ends: 8431 [2020-10-14 09:26:36,242 INFO L226 Difference]: Without dead ends: 5105 [2020-10-14 09:26:36,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:36,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5105 states. [2020-10-14 09:26:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5105 to 4947. [2020-10-14 09:26:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4947 states. [2020-10-14 09:26:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4947 states to 4947 states and 7767 transitions. [2020-10-14 09:26:36,732 INFO L78 Accepts]: Start accepts. Automaton has 4947 states and 7767 transitions. Word has length 75 [2020-10-14 09:26:36,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:36,732 INFO L479 AbstractCegarLoop]: Abstraction has 4947 states and 7767 transitions. [2020-10-14 09:26:36,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 4947 states and 7767 transitions. [2020-10-14 09:26:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:26:36,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:36,735 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:36,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:26:36,737 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:36,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:36,737 INFO L82 PathProgramCache]: Analyzing trace with hash -799578856, now seen corresponding path program 1 times [2020-10-14 09:26:36,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:36,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628242221] [2020-10-14 09:26:36,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:36,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:36,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:36,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:36,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:37,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:37,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:37,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:39,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:41,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:41,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:26:41,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:26:41,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:26:41,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:41,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:41,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:41,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:26:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 09:26:41,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:41,956 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:41,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:41,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:41,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:41,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:41,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:41,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:26:41,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:41,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:41,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:41,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628242221] [2020-10-14 09:26:41,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:41,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:41,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345361950] [2020-10-14 09:26:41,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:41,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:41,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:41,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:41,985 INFO L87 Difference]: Start difference. First operand 4947 states and 7767 transitions. Second operand 4 states. [2020-10-14 09:26:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:43,415 INFO L93 Difference]: Finished difference Result 14169 states and 22293 transitions. [2020-10-14 09:26:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:43,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-14 09:26:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:43,439 INFO L225 Difference]: With dead ends: 14169 [2020-10-14 09:26:43,440 INFO L226 Difference]: Without dead ends: 9451 [2020-10-14 09:26:43,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2020-10-14 09:26:44,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 9449. [2020-10-14 09:26:44,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9449 states. [2020-10-14 09:26:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9449 states to 9449 states and 14719 transitions. [2020-10-14 09:26:44,233 INFO L78 Accepts]: Start accepts. Automaton has 9449 states and 14719 transitions. Word has length 76 [2020-10-14 09:26:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:44,233 INFO L479 AbstractCegarLoop]: Abstraction has 9449 states and 14719 transitions. [2020-10-14 09:26:44,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 9449 states and 14719 transitions. [2020-10-14 09:26:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:26:44,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:44,238 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:44,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:26:44,238 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:44,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:44,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1928154123, now seen corresponding path program 1 times [2020-10-14 09:26:44,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:44,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788064119] [2020-10-14 09:26:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:44,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:44,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:44,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:44,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:44,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:44,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:45,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:46,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:46,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:49,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:49,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:26:49,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:26:49,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:26:49,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:49,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:49,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:49,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:26:49,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 09:26:49,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:49,502 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:49,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:49,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:49,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:49,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:49,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:49,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:26:49,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:49,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:49,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:49,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:49,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:49,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:49,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788064119] [2020-10-14 09:26:49,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:49,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:49,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746510426] [2020-10-14 09:26:49,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:49,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:49,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:49,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:49,529 INFO L87 Difference]: Start difference. First operand 9449 states and 14719 transitions. Second operand 5 states. [2020-10-14 09:26:51,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:51,442 INFO L93 Difference]: Finished difference Result 25987 states and 40585 transitions. [2020-10-14 09:26:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:51,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 09:26:51,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:51,482 INFO L225 Difference]: With dead ends: 25987 [2020-10-14 09:26:51,482 INFO L226 Difference]: Without dead ends: 16793 [2020-10-14 09:26:51,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16793 states. [2020-10-14 09:26:52,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16793 to 16791. [2020-10-14 09:26:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16791 states. [2020-10-14 09:26:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 25975 transitions. [2020-10-14 09:26:52,753 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 25975 transitions. Word has length 76 [2020-10-14 09:26:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:52,753 INFO L479 AbstractCegarLoop]: Abstraction has 16791 states and 25975 transitions. [2020-10-14 09:26:52,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 25975 transitions. [2020-10-14 09:26:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:26:52,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:52,758 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:52,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:26:52,758 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:52,759 INFO L82 PathProgramCache]: Analyzing trace with hash 611262788, now seen corresponding path program 1 times [2020-10-14 09:26:52,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:52,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585650026] [2020-10-14 09:26:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:52,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:52,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:52,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:52,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:52,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:52,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:52,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:57,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:57,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:26:57,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:57,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:26:57,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:57,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:26:57,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 09:26:57,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:58,005 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:58,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:58,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:58,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:58,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:58,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:58,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:26:58,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:58,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:58,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:58,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:58,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:58,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:58,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585650026] [2020-10-14 09:26:58,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:58,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:58,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487737285] [2020-10-14 09:26:58,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:58,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:58,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:58,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:58,032 INFO L87 Difference]: Start difference. First operand 16791 states and 25975 transitions. Second operand 5 states. [2020-10-14 09:27:00,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:00,128 INFO L93 Difference]: Finished difference Result 35003 states and 54231 transitions. [2020-10-14 09:27:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:27:00,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 09:27:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:00,170 INFO L225 Difference]: With dead ends: 35003 [2020-10-14 09:27:00,170 INFO L226 Difference]: Without dead ends: 18611 [2020-10-14 09:27:00,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:27:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18611 states. [2020-10-14 09:27:01,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18611 to 16962. [2020-10-14 09:27:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16962 states. [2020-10-14 09:27:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16962 states to 16962 states and 26172 transitions. [2020-10-14 09:27:01,611 INFO L78 Accepts]: Start accepts. Automaton has 16962 states and 26172 transitions. Word has length 76 [2020-10-14 09:27:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:01,611 INFO L479 AbstractCegarLoop]: Abstraction has 16962 states and 26172 transitions. [2020-10-14 09:27:01,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:27:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 16962 states and 26172 transitions. [2020-10-14 09:27:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:27:01,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:01,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:01,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:27:01,619 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:01,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1719545426, now seen corresponding path program 1 times [2020-10-14 09:27:01,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:01,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754837611] [2020-10-14 09:27:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:01,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:01,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:01,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:01,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:01,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:06,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:06,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:27:06,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:27:06,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:27:06,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:06,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:06,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:27:06,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 09:27:06,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 09:27:06,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:06,823 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:27:06,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:06,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:06,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:06,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:06,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:06,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:06,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:06,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:06,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:06,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:06,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:06,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:06,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754837611] [2020-10-14 09:27:06,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:06,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:27:06,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359796917] [2020-10-14 09:27:06,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:27:06,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:06,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:27:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:06,847 INFO L87 Difference]: Start difference. First operand 16962 states and 26172 transitions. Second operand 4 states. [2020-10-14 09:27:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:09,204 INFO L93 Difference]: Finished difference Result 40804 states and 63824 transitions. [2020-10-14 09:27:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:27:09,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:27:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:09,252 INFO L225 Difference]: With dead ends: 40804 [2020-10-14 09:27:09,252 INFO L226 Difference]: Without dead ends: 24582 [2020-10-14 09:27:09,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24582 states. [2020-10-14 09:27:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24582 to 23716. [2020-10-14 09:27:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23716 states. [2020-10-14 09:27:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23716 states to 23716 states and 36738 transitions. [2020-10-14 09:27:11,976 INFO L78 Accepts]: Start accepts. Automaton has 23716 states and 36738 transitions. Word has length 77 [2020-10-14 09:27:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:11,976 INFO L479 AbstractCegarLoop]: Abstraction has 23716 states and 36738 transitions. [2020-10-14 09:27:11,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:27:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 23716 states and 36738 transitions. [2020-10-14 09:27:11,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:27:11,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:11,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:11,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:27:11,984 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash 170775727, now seen corresponding path program 1 times [2020-10-14 09:27:11,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:11,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476281706] [2020-10-14 09:27:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:12,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:12,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:12,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:12,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:12,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:12,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:15,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:17,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:17,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:27:17,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:27:17,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:27:17,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:17,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:27:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:27:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:27:17,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:17,183 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:27:17,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:17,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:17,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:17,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:17,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:17,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:17,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:17,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:17,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:17,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:17,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:17,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:17,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476281706] [2020-10-14 09:27:17,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:17,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:27:17,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332567210] [2020-10-14 09:27:17,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:27:17,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:17,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:27:17,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:17,206 INFO L87 Difference]: Start difference. First operand 23716 states and 36738 transitions. Second operand 4 states. [2020-10-14 09:27:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:21,288 INFO L93 Difference]: Finished difference Result 70861 states and 109839 transitions. [2020-10-14 09:27:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:27:21,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:27:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:21,363 INFO L225 Difference]: With dead ends: 70861 [2020-10-14 09:27:21,363 INFO L226 Difference]: Without dead ends: 47396 [2020-10-14 09:27:21,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:21,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47396 states. [2020-10-14 09:27:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47396 to 23719. [2020-10-14 09:27:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23719 states. [2020-10-14 09:27:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23719 states to 23719 states and 36742 transitions. [2020-10-14 09:27:23,705 INFO L78 Accepts]: Start accepts. Automaton has 23719 states and 36742 transitions. Word has length 77 [2020-10-14 09:27:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:23,706 INFO L479 AbstractCegarLoop]: Abstraction has 23719 states and 36742 transitions. [2020-10-14 09:27:23,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:27:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 23719 states and 36742 transitions. [2020-10-14 09:27:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 09:27:23,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:23,712 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:23,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:27:23,712 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:23,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:23,713 INFO L82 PathProgramCache]: Analyzing trace with hash 323191237, now seen corresponding path program 1 times [2020-10-14 09:27:23,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:23,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925128110] [2020-10-14 09:27:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:23,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:23,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:23,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:23,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:23,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:23,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:23,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:28,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:28,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 09:27:28,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:27:28,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:27:28,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:28,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:28,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:27:28,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:27:28,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:27:28,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:28,935 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:27:28,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:28,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:28,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:28,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:28,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:28,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:28,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:28,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:28,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:28,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:28,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:28,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:28,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925128110] [2020-10-14 09:27:28,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:28,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:27:28,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108758008] [2020-10-14 09:27:28,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:27:28,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:28,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:27:28,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:27:28,957 INFO L87 Difference]: Start difference. First operand 23719 states and 36742 transitions. Second operand 6 states. [2020-10-14 09:27:29,166 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:27:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:38,202 INFO L93 Difference]: Finished difference Result 122271 states and 192786 transitions. [2020-10-14 09:27:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:27:38,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-14 09:27:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:38,332 INFO L225 Difference]: With dead ends: 122271 [2020-10-14 09:27:38,332 INFO L226 Difference]: Without dead ends: 99295 [2020-10-14 09:27:38,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:27:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99295 states. [2020-10-14 09:27:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99295 to 45365. [2020-10-14 09:27:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45365 states. [2020-10-14 09:27:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45365 states to 45365 states and 70148 transitions. [2020-10-14 09:27:42,401 INFO L78 Accepts]: Start accepts. Automaton has 45365 states and 70148 transitions. Word has length 78 [2020-10-14 09:27:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:42,402 INFO L479 AbstractCegarLoop]: Abstraction has 45365 states and 70148 transitions. [2020-10-14 09:27:42,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:27:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 45365 states and 70148 transitions. [2020-10-14 09:27:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:27:42,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:42,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:42,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:27:42,410 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:42,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1367383318, now seen corresponding path program 1 times [2020-10-14 09:27:42,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:42,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892979664] [2020-10-14 09:27:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:42,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:42,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:42,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:42,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:42,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:42,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:42,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:47,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:47,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:27:47,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:27:47,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5154 [2020-10-14 09:27:47,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:47,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:27:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:27:47,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:27:47,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:47,766 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:27:47,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:47,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:47,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:47,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:47,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:47,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:27:47,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:47,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:47,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:47,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:47,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:47,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:47,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892979664] [2020-10-14 09:27:47,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:47,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:27:47,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027958433] [2020-10-14 09:27:47,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:27:47,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:47,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:27:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:27:47,791 INFO L87 Difference]: Start difference. First operand 45365 states and 70148 transitions. Second operand 5 states. [2020-10-14 09:27:47,983 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:27:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:56,774 INFO L93 Difference]: Finished difference Result 148599 states and 232595 transitions. [2020-10-14 09:27:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:27:56,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-14 09:27:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:57,091 INFO L225 Difference]: With dead ends: 148599 [2020-10-14 09:27:57,092 INFO L226 Difference]: Without dead ends: 103977 [2020-10-14 09:27:57,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:27:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103977 states. [2020-10-14 09:28:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103977 to 74421. [2020-10-14 09:28:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74421 states. [2020-10-14 09:28:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74421 states to 74421 states and 115496 transitions. [2020-10-14 09:28:05,264 INFO L78 Accepts]: Start accepts. Automaton has 74421 states and 115496 transitions. Word has length 79 [2020-10-14 09:28:05,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:28:05,265 INFO L479 AbstractCegarLoop]: Abstraction has 74421 states and 115496 transitions. [2020-10-14 09:28:05,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:28:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 74421 states and 115496 transitions. [2020-10-14 09:28:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:28:05,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:28:05,274 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:28:05,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:28:05,274 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:28:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:28:05,275 INFO L82 PathProgramCache]: Analyzing trace with hash 655939681, now seen corresponding path program 1 times [2020-10-14 09:28:05,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:28:05,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656381359] [2020-10-14 09:28:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:28:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:05,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:05,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:05,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:05,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:06,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:10,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:10,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:28:10,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:28:10,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:28:10,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:10,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:28:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 09:28:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 09:28:10,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:10,500 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:28:10,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:28:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:10,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:10,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:10,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:28:10,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:28:10,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:28:10,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:10,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:28:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:28:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:28:10,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:28:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:28:10,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656381359] [2020-10-14 09:28:10,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:28:10,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:28:10,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108441266] [2020-10-14 09:28:10,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:28:10,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:28:10,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:28:10,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:28:10,534 INFO L87 Difference]: Start difference. First operand 74421 states and 115496 transitions. Second operand 4 states. [2020-10-14 09:28:10,722 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:28:19,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:28:19,755 INFO L93 Difference]: Finished difference Result 146493 states and 228570 transitions. [2020-10-14 09:28:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:28:19,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:28:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:28:19,878 INFO L225 Difference]: With dead ends: 146493 [2020-10-14 09:28:19,878 INFO L226 Difference]: Without dead ends: 96999 [2020-10-14 09:28:19,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:28:19,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96999 states. [2020-10-14 09:28:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96999 to 96997. [2020-10-14 09:28:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96997 states. [2020-10-14 09:28:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96997 states to 96997 states and 150448 transitions. [2020-10-14 09:28:30,263 INFO L78 Accepts]: Start accepts. Automaton has 96997 states and 150448 transitions. Word has length 80 [2020-10-14 09:28:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:28:30,264 INFO L479 AbstractCegarLoop]: Abstraction has 96997 states and 150448 transitions. [2020-10-14 09:28:30,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:28:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 96997 states and 150448 transitions. [2020-10-14 09:28:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:28:30,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:28:30,268 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:28:30,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:28:30,269 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:28:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:28:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash -617842516, now seen corresponding path program 1 times [2020-10-14 09:28:30,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:28:30,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057476798] [2020-10-14 09:28:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:28:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:30,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:30,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:30,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:30,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:30,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:30,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:30,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:35,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:35,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:28:35,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:28:35,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 09:28:35,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:35,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:35,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:28:35,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:28:35,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:28:35,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:35,473 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:28:35,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:28:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:35,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:35,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:35,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:28:35,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:28:35,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:28:35,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:35,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:28:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:28:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:28:35,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:28:35,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057476798] [2020-10-14 09:28:35,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:28:35,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:28:35,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261683617] [2020-10-14 09:28:35,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:28:35,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:28:35,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:28:35,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:28:35,493 INFO L87 Difference]: Start difference. First operand 96997 states and 150448 transitions. Second operand 5 states. [2020-10-14 09:28:35,688 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:28:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:28:57,497 INFO L93 Difference]: Finished difference Result 321855 states and 501751 transitions. [2020-10-14 09:28:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:28:57,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-14 09:28:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:28:57,851 INFO L225 Difference]: With dead ends: 321855 [2020-10-14 09:28:57,851 INFO L226 Difference]: Without dead ends: 226129 [2020-10-14 09:28:57,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:28:58,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226129 states. [2020-10-14 09:29:15,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226129 to 161129. [2020-10-14 09:29:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161129 states. [2020-10-14 09:29:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161129 states to 161129 states and 249178 transitions. [2020-10-14 09:29:15,628 INFO L78 Accepts]: Start accepts. Automaton has 161129 states and 249178 transitions. Word has length 80 [2020-10-14 09:29:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:29:15,628 INFO L479 AbstractCegarLoop]: Abstraction has 161129 states and 249178 transitions. [2020-10-14 09:29:15,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:29:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 161129 states and 249178 transitions. [2020-10-14 09:29:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:29:15,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:29:15,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:29:15,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:29:15,634 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:29:15,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:29:15,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1121986609, now seen corresponding path program 1 times [2020-10-14 09:29:15,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:29:15,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34955633] [2020-10-14 09:29:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:29:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:29:15,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:15,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:15,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:16,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:16,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:18,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:18,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:20,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:29:20,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:29:20,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:29:20,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:29:20,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:29:20,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:29:20,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:29:20,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 09:29:20,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 09:29:20,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:29:20,837 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:29:20,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:29:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:29:20,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:20,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:29:20,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:29:20,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:29:20,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:29:20,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:29:20,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:29:20,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:29:20,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:29:20,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:29:20,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:29:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:29:20,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34955633] [2020-10-14 09:29:20,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:29:20,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:29:20,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611685281] [2020-10-14 09:29:20,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:29:20,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:29:20,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:29:20,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:29:20,857 INFO L87 Difference]: Start difference. First operand 161129 states and 249178 transitions. Second operand 4 states. [2020-10-14 09:29:21,048 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 167