/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 SingleStatement --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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:42:32,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:42:32,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:42:32,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:42:32,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:42:32,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:42:32,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:42:32,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:42:32,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:42:32,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:42:32,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:42:32,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:42:32,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:42:32,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:42:32,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:42:32,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:42:32,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:42:32,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:42:32,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:42:32,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:42:32,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:42:32,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:42:32,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:42:32,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:42:32,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:42:32,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:42:32,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:42:32,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:42:32,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:42:32,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:42:32,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:42:32,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:42:32,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:42:32,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:42:32,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:42:32,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:42:32,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:42:32,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:42:32,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:42:32,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:42:32,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:42:32,981 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 [2020-09-25 13:42:33,007 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:42:33,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:42:33,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:42:33,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:42:33,009 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:42:33,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:42:33,010 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:42:33,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:42:33,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:42:33,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:42:33,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:42:33,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:42:33,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:42:33,011 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:42:33,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:42:33,011 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:42:33,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:42:33,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:42:33,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:42:33,012 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:42:33,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:42:33,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:42:33,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:42:33,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:42:33,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:42:33,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:42:33,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:42:33,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:42:33,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:42:33,014 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 -> SingleStatement 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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:42:33,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:42:33,498 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:42:33,503 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:42:33,504 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:42:33,505 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:42:33,506 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 13:42:33,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2eb7d753/8fbd535df36b43e2adbbfc6b80721b1b/FLAG7f4e17880 [2020-09-25 13:42:34,277 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:42:34,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 13:42:34,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2eb7d753/8fbd535df36b43e2adbbfc6b80721b1b/FLAG7f4e17880 [2020-09-25 13:42:34,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2eb7d753/8fbd535df36b43e2adbbfc6b80721b1b [2020-09-25 13:42:34,507 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:42:34,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:42:34,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:42:34,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:42:34,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:42:34,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:42:34" (1/1) ... [2020-09-25 13:42:34,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17866592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:34, skipping insertion in model container [2020-09-25 13:42:34,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:42:34" (1/1) ... [2020-09-25 13:42:34,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:42:34,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:42:35,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:42:35,245 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:42:35,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:42:35,683 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:42:35,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:35 WrapperNode [2020-09-25 13:42:35,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:42:35,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:42:35,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:42:35,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:42:35,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:35" (1/1) ... [2020-09-25 13:42:35,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:35" (1/1) ... [2020-09-25 13:42:35,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:35" (1/1) ... [2020-09-25 13:42:35,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:35" (1/1) ... [2020-09-25 13:42:35,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:35" (1/1) ... [2020-09-25 13:42:35,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:35" (1/1) ... [2020-09-25 13:42:35,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:35" (1/1) ... [2020-09-25 13:42:35,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:42:35,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:42:35,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:42:35,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:42:35,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:35" (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 [2020-09-25 13:42:35,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:42:35,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:42:35,915 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 13:42:35,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:42:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:42:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 13:42:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 13:42:35,917 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 13:42:35,917 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 13:42:35,917 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 13:42:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 13:42:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 13:42:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 13:42:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 13:42:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 13:42:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 13:42:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 13:42:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:42:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:42:35,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:42:37,694 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:42:37,695 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 13:42:37,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:42:37 BoogieIcfgContainer [2020-09-25 13:42:37,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:42:37,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:42:37,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:42:37,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:42:37,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:42:34" (1/3) ... [2020-09-25 13:42:37,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@299eac2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:42:37, skipping insertion in model container [2020-09-25 13:42:37,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:42:35" (2/3) ... [2020-09-25 13:42:37,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@299eac2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:42:37, skipping insertion in model container [2020-09-25 13:42:37,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:42:37" (3/3) ... [2020-09-25 13:42:37,717 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 13:42:37,729 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:42:37,741 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:42:37,763 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:42:37,801 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:42:37,801 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:42:37,801 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:42:37,802 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:42:37,802 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:42:37,802 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:42:37,802 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:42:37,802 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:42:37,844 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states. [2020-09-25 13:42:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 13:42:37,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:37,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:42:37,881 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash 752602954, now seen corresponding path program 1 times [2020-09-25 13:42:37,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:37,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542791479] [2020-09-25 13:42:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:38,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:39,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:39,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:39,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:40,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:40,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:40,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:41,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:43,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:43,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 13:42:43,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:42:43,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-25 13:42:43,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:43,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:43,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:42:43,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-09-25 13:42:43,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-25 13:42:43,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 13:42:44,269 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 13:42:44,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:44,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:44,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:44,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 13:42:44,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:44,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-25 13:42:44,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:44,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:44,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:44,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:44,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:44,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:42:44,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542791479] [2020-09-25 13:42:44,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:44,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:42:44,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753778620] [2020-09-25 13:42:44,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:42:44,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:44,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:42:44,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:44,903 INFO L87 Difference]: Start difference. First operand 912 states. Second operand 4 states. [2020-09-25 13:42:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:42:49,012 INFO L93 Difference]: Finished difference Result 1664 states and 2163 transitions. [2020-09-25 13:42:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 13:42:49,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 13:42:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:42:49,050 INFO L225 Difference]: With dead ends: 1664 [2020-09-25 13:42:49,050 INFO L226 Difference]: Without dead ends: 1251 [2020-09-25 13:42:49,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-09-25 13:42:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1244. [2020-09-25 13:42:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1244 states. [2020-09-25 13:42:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1517 transitions. [2020-09-25 13:42:49,211 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1517 transitions. Word has length 460 [2020-09-25 13:42:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:42:49,213 INFO L479 AbstractCegarLoop]: Abstraction has 1244 states and 1517 transitions. [2020-09-25 13:42:49,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:42:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1517 transitions. [2020-09-25 13:42:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 13:42:49,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:49,225 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:42:49,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:42:49,226 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:49,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1495383786, now seen corresponding path program 1 times [2020-09-25 13:42:49,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:49,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995683250] [2020-09-25 13:42:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:49,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:49,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:49,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:50,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:50,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:50,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:50,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:50,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:54,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:54,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 13:42:54,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:42:54,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 13:42:54,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:54,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:54,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:42:54,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 206 [2020-09-25 13:42:54,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-09-25 13:42:54,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:55,035 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 13:42:55,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:55,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:55,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:55,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 13:42:55,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:55,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-25 13:42:55,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:55,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:55,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:55,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:55,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:55,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:42:55,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995683250] [2020-09-25 13:42:55,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:55,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:42:55,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101441047] [2020-09-25 13:42:55,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:42:55,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:55,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:42:55,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:55,433 INFO L87 Difference]: Start difference. First operand 1244 states and 1517 transitions. Second operand 4 states. [2020-09-25 13:42:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:42:58,163 INFO L93 Difference]: Finished difference Result 2510 states and 3146 transitions. [2020-09-25 13:42:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 13:42:58,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 13:42:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:42:58,176 INFO L225 Difference]: With dead ends: 2510 [2020-09-25 13:42:58,176 INFO L226 Difference]: Without dead ends: 2066 [2020-09-25 13:42:58,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2020-09-25 13:42:58,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 2054. [2020-09-25 13:42:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2054 states. [2020-09-25 13:42:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2545 transitions. [2020-09-25 13:42:58,244 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2545 transitions. Word has length 460 [2020-09-25 13:42:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:42:58,246 INFO L479 AbstractCegarLoop]: Abstraction has 2054 states and 2545 transitions. [2020-09-25 13:42:58,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:42:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2545 transitions. [2020-09-25 13:42:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 13:42:58,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:58,257 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:42:58,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:42:58,257 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:58,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:58,258 INFO L82 PathProgramCache]: Analyzing trace with hash -863833942, now seen corresponding path program 1 times [2020-09-25 13:42:58,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:58,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631635874] [2020-09-25 13:42:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:58,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:58,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:58,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:58,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:59,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:59,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:59,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:59,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:03,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:43:03,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 13:43:03,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:43:03,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-09-25 13:43:03,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:43:03,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:43:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:43:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-25 13:43:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-09-25 13:43:03,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:43:03,827 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 13:43:03,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:43:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:43:03,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:03,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:43:03,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 13:43:03,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:43:03,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 13:43:03,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:43:03,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:43:03,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:43:03,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:43:03,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:43:03,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:43:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:43:04,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631635874] [2020-09-25 13:43:04,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:43:04,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:43:04,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706934970] [2020-09-25 13:43:04,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:43:04,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:43:04,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:43:04,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:43:04,166 INFO L87 Difference]: Start difference. First operand 2054 states and 2545 transitions. Second operand 4 states. [2020-09-25 13:43:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:43:06,976 INFO L93 Difference]: Finished difference Result 4382 states and 5559 transitions. [2020-09-25 13:43:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 13:43:06,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 13:43:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:43:07,002 INFO L225 Difference]: With dead ends: 4382 [2020-09-25 13:43:07,002 INFO L226 Difference]: Without dead ends: 3596 [2020-09-25 13:43:07,005 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 [2020-09-25 13:43:07,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2020-09-25 13:43:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3574. [2020-09-25 13:43:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3574 states. [2020-09-25 13:43:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 4481 transitions. [2020-09-25 13:43:07,100 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 4481 transitions. Word has length 460 [2020-09-25 13:43:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:43:07,101 INFO L479 AbstractCegarLoop]: Abstraction has 3574 states and 4481 transitions. [2020-09-25 13:43:07,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:43:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 4481 transitions. [2020-09-25 13:43:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 13:43:07,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:43:07,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:43:07,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:43:07,120 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:43:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:43:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1795052938, now seen corresponding path program 1 times [2020-09-25 13:43:07,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:43:07,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253320270] [2020-09-25 13:43:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:43:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:43:07,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:07,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:07,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:07,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:07,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:08,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:08,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:10,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:10,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:11,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:12,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:43:12,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 13:43:12,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 13:43:12,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-09-25 13:43:12,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:43:12,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:43:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:43:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 176 [2020-09-25 13:43:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-09-25 13:43:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:43:12,731 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 13:43:12,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:43:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:43:12,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:12,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:43:12,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 13:43:12,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:43:12,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 13:43:12,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:43:12,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:43:12,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:43:12,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:43:12,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:43:12,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:43:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:43:13,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253320270] [2020-09-25 13:43:13,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:43:13,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:43:13,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087941721] [2020-09-25 13:43:13,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:43:13,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:43:13,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:43:13,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:43:13,058 INFO L87 Difference]: Start difference. First operand 3574 states and 4481 transitions. Second operand 5 states. [2020-09-25 13:43:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:43:17,782 INFO L93 Difference]: Finished difference Result 10122 states and 12749 transitions. [2020-09-25 13:43:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:43:17,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 460 [2020-09-25 13:43:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:43:17,811 INFO L225 Difference]: With dead ends: 10122 [2020-09-25 13:43:17,811 INFO L226 Difference]: Without dead ends: 6753 [2020-09-25 13:43:17,818 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 [2020-09-25 13:43:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6753 states. [2020-09-25 13:43:17,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6753 to 6751. [2020-09-25 13:43:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6751 states. [2020-09-25 13:43:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6751 states to 6751 states and 8448 transitions. [2020-09-25 13:43:18,024 INFO L78 Accepts]: Start accepts. Automaton has 6751 states and 8448 transitions. Word has length 460 [2020-09-25 13:43:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:43:18,025 INFO L479 AbstractCegarLoop]: Abstraction has 6751 states and 8448 transitions. [2020-09-25 13:43:18,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:43:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6751 states and 8448 transitions. [2020-09-25 13:43:18,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-09-25 13:43:18,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:43:18,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:43:18,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:43:18,043 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:43:18,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:43:18,044 INFO L82 PathProgramCache]: Analyzing trace with hash 575680170, now seen corresponding path program 1 times [2020-09-25 13:43:18,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:43:18,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670719751] [2020-09-25 13:43:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:43:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:43:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:18,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:18,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:18,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:18,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:18,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:20,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:43:20,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking...