/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --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.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:04:48,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:04:48,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:04:48,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:04:48,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:04:48,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:04:48,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:04:48,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:04:48,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:04:48,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:04:48,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:04:48,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:04:48,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:04:48,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:04:48,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:04:48,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:04:48,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:04:48,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:04:48,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:04:48,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:04:48,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:04:48,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:04:48,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:04:48,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:04:48,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:04:48,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:04:48,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:04:48,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:04:48,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:04:48,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:04:48,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:04:48,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:04:48,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:04:48,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:04:48,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:04:48,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:04:48,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:04:48,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:04:48,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:04:48,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:04:48,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:04:48,938 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 08:04:48,961 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:04:48,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:04:48,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:04:48,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:04:48,963 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:04:48,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:04:48,964 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:04:48,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:04:48,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:04:48,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:04:48,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:04:48,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:04:48,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:04:48,965 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:04:48,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:04:48,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:04:48,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:04:48,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:04:48,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:04:48,967 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:04:48,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:04:48,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:04:48,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:04:48,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:04:48,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:04:48,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:04:48,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:04:48,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:04:48,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:04:48,969 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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 08:04:49,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:04:49,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:04:49,450 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:04:49,452 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:04:49,454 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:04:49,455 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 08:04:49,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e753b2154/a251ac357b254e71904c1fed0ff8118b/FLAG2f0c8e7ca [2020-09-25 08:04:50,236 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:04:50,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 08:04:50,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e753b2154/a251ac357b254e71904c1fed0ff8118b/FLAG2f0c8e7ca [2020-09-25 08:04:50,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e753b2154/a251ac357b254e71904c1fed0ff8118b [2020-09-25 08:04:50,491 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:04:50,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:04:50,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:04:50,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:04:50,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:04:50,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:04:50" (1/1) ... [2020-09-25 08:04:50,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b2f3aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:50, skipping insertion in model container [2020-09-25 08:04:50,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:04:50" (1/1) ... [2020-09-25 08:04:50,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:04:50,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:04:51,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:04:51,253 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:04:51,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:04:51,452 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:04:51,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:51 WrapperNode [2020-09-25 08:04:51,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:04:51,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:04:51,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:04:51,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:04:51,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:51" (1/1) ... [2020-09-25 08:04:51,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:51" (1/1) ... [2020-09-25 08:04:51,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:51" (1/1) ... [2020-09-25 08:04:51,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:51" (1/1) ... [2020-09-25 08:04:51,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:51" (1/1) ... [2020-09-25 08:04:51,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:51" (1/1) ... [2020-09-25 08:04:51,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:51" (1/1) ... [2020-09-25 08:04:51,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:04:51,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:04:51,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:04:51,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:04:51,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:51" (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 08:04:51,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:04:51,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:04:51,684 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 08:04:51,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:04:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:04:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 08:04:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 08:04:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 08:04:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 08:04:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 08:04:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 08:04:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 08:04:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 08:04:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 08:04:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 08:04:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 08:04:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 08:04:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 08:04:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:04:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:04:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:04:53,596 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:04:53,597 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 08:04:53,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:04:53 BoogieIcfgContainer [2020-09-25 08:04:53,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:04:53,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:04:53,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:04:53,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:04:53,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:04:50" (1/3) ... [2020-09-25 08:04:53,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ce3ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:04:53, skipping insertion in model container [2020-09-25 08:04:53,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:51" (2/3) ... [2020-09-25 08:04:53,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ce3ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:04:53, skipping insertion in model container [2020-09-25 08:04:53,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:04:53" (3/3) ... [2020-09-25 08:04:53,631 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 08:04:53,641 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:04:53,654 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:04:53,675 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:04:53,710 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:04:53,710 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:04:53,710 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:04:53,711 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:04:53,711 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:04:53,711 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:04:53,711 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:04:53,711 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:04:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-25 08:04:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 08:04:53,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:04:53,790 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] [2020-09-25 08:04:53,791 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:04:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:04:53,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-25 08:04:53,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:04:53,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664583735] [2020-09-25 08:04:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:04:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:54,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:55,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:55,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:55,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:55,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:55,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:56,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:58,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:59,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:59,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:59,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 08:04:59,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 08:04:59,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-09-25 08:04:59,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:59,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:59,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:04:59,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 200 [2020-09-25 08:04:59,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-25 08:04:59,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 08:05:00,500 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 08:05:00,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:05:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:00,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:00,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:00,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 08:05:00,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:05:00,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-25 08:05:00,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:00,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:00,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:05:00,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:05:00,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:05:00,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:05:01,006 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 08:05:01,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664583735] [2020-09-25 08:05:01,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:05:01,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:05:01,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057117107] [2020-09-25 08:05:01,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:05:01,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:05:01,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:05:01,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:05:01,045 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 4 states. [2020-09-25 08:05:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:05:05,137 INFO L93 Difference]: Finished difference Result 1657 states and 2169 transitions. [2020-09-25 08:05:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:05:05,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-25 08:05:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:05:05,175 INFO L225 Difference]: With dead ends: 1657 [2020-09-25 08:05:05,176 INFO L226 Difference]: Without dead ends: 1241 [2020-09-25 08:05:05,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:05:05,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-25 08:05:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1234. [2020-09-25 08:05:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-25 08:05:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1513 transitions. [2020-09-25 08:05:05,363 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1513 transitions. Word has length 449 [2020-09-25 08:05:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:05:05,366 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1513 transitions. [2020-09-25 08:05:05,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:05:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1513 transitions. [2020-09-25 08:05:05,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 08:05:05,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:05:05,385 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] [2020-09-25 08:05:05,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:05:05,385 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:05:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:05:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1248222459, now seen corresponding path program 1 times [2020-09-25 08:05:05,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:05:05,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935517336] [2020-09-25 08:05:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:05:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:05,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:05,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:05,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:06,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:06,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:06,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:06,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:09,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:09,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:10,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:10,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 08:05:10,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 08:05:10,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-09-25 08:05:10,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:10,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:10,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:05:10,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 201 [2020-09-25 08:05:10,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-25 08:05:10,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 08:05:11,134 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 08:05:11,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:05:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:11,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:11,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:11,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 08:05:11,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:05:11,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 08:05:11,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:11,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:11,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:05:11,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:05:11,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:05:11,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:11,500 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 08:05:11,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935517336] [2020-09-25 08:05:11,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:05:11,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:05:11,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687885626] [2020-09-25 08:05:11,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:05:11,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:05:11,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:05:11,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:05:11,506 INFO L87 Difference]: Start difference. First operand 1234 states and 1513 transitions. Second operand 4 states. [2020-09-25 08:05:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:05:14,657 INFO L93 Difference]: Finished difference Result 2498 states and 3152 transitions. [2020-09-25 08:05:14,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:05:14,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-25 08:05:14,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:05:14,673 INFO L225 Difference]: With dead ends: 2498 [2020-09-25 08:05:14,673 INFO L226 Difference]: Without dead ends: 2052 [2020-09-25 08:05:14,677 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 08:05:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-09-25 08:05:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2040. [2020-09-25 08:05:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2040 states. [2020-09-25 08:05:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2543 transitions. [2020-09-25 08:05:14,749 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2543 transitions. Word has length 449 [2020-09-25 08:05:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:05:14,750 INFO L479 AbstractCegarLoop]: Abstraction has 2040 states and 2543 transitions. [2020-09-25 08:05:14,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:05:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2543 transitions. [2020-09-25 08:05:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 08:05:14,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:05:14,757 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] [2020-09-25 08:05:14,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:05:14,757 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:05:14,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:05:14,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1103013733, now seen corresponding path program 1 times [2020-09-25 08:05:14,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:05:14,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696651499] [2020-09-25 08:05:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:05:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:14,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:15,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:15,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:15,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:15,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:15,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:16,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:16,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:19,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:19,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:19,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:19,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 08:05:19,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 08:05:19,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 08:05:19,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:19,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:05:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-09-25 08:05:19,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-25 08:05:19,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:20,358 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 08:05:20,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:05:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:20,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:20,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:20,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 08:05:20,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:05:20,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 08:05:20,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:20,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:20,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:05:20,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:05:20,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:05:20,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:20,722 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 08:05:20,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696651499] [2020-09-25 08:05:20,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:05:20,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:05:20,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697132604] [2020-09-25 08:05:20,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:05:20,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:05:20,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:05:20,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:05:20,726 INFO L87 Difference]: Start difference. First operand 2040 states and 2543 transitions. Second operand 5 states. [2020-09-25 08:05:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:05:25,129 INFO L93 Difference]: Finished difference Result 5618 states and 7070 transitions. [2020-09-25 08:05:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:05:25,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-25 08:05:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:05:25,149 INFO L225 Difference]: With dead ends: 5618 [2020-09-25 08:05:25,149 INFO L226 Difference]: Without dead ends: 3766 [2020-09-25 08:05:25,154 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 08:05:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2020-09-25 08:05:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3764. [2020-09-25 08:05:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3764 states. [2020-09-25 08:05:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 4700 transitions. [2020-09-25 08:05:25,278 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 4700 transitions. Word has length 449 [2020-09-25 08:05:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:05:25,278 INFO L479 AbstractCegarLoop]: Abstraction has 3764 states and 4700 transitions. [2020-09-25 08:05:25,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:05:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 4700 transitions. [2020-09-25 08:05:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-25 08:05:25,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:05:25,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:25,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:05:25,289 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:05:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:05:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2002315190, now seen corresponding path program 1 times [2020-09-25 08:05:25,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:05:25,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784164519] [2020-09-25 08:05:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:05:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:25,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:25,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:25,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:25,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:26,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:26,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:27,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:28,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:30,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:30,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-09-25 08:05:30,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:05:30,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 08:05:30,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:30,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:05:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-09-25 08:05:30,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-09-25 08:05:30,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:30,909 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 08:05:30,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:05:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:30,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:30,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 08:05:30,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:05:30,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 08:05:30,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:30,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:05:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:05:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:05:30,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:31,248 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 08:05:31,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784164519] [2020-09-25 08:05:31,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:05:31,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:05:31,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113966670] [2020-09-25 08:05:31,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:05:31,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:05:31,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:05:31,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:05:31,251 INFO L87 Difference]: Start difference. First operand 3764 states and 4700 transitions. Second operand 5 states. [2020-09-25 08:05:36,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:05:36,542 INFO L93 Difference]: Finished difference Result 10590 states and 13290 transitions. [2020-09-25 08:05:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:05:36,544 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 450 [2020-09-25 08:05:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:05:36,572 INFO L225 Difference]: With dead ends: 10590 [2020-09-25 08:05:36,572 INFO L226 Difference]: Without dead ends: 7106 [2020-09-25 08:05:36,581 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 08:05:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7106 states. [2020-09-25 08:05:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7106 to 7104. [2020-09-25 08:05:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7104 states. [2020-09-25 08:05:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 8853 transitions. [2020-09-25 08:05:36,869 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 8853 transitions. Word has length 450 [2020-09-25 08:05:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:05:36,869 INFO L479 AbstractCegarLoop]: Abstraction has 7104 states and 8853 transitions. [2020-09-25 08:05:36,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:05:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 8853 transitions. [2020-09-25 08:05:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-25 08:05:36,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:05:36,883 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] [2020-09-25 08:05:36,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:05:36,884 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:05:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:05:36,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1961035865, now seen corresponding path program 1 times [2020-09-25 08:05:36,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:05:36,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086606831] [2020-09-25 08:05:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:05:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:37,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking...