/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=0.1 --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_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:19:34,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:19:34,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:19:34,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:19:34,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:19:34,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:19:34,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:19:34,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:19:34,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:19:34,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:19:34,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:19:34,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:19:34,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:19:34,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:19:34,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:19:34,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:19:34,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:19:34,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:19:34,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:19:34,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:19:34,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:19:34,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:19:34,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:19:34,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:19:34,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:19:34,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:19:34,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:19:34,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:19:34,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:19:34,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:19:34,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:19:34,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:19:34,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:19:34,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:19:34,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:19:34,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:19:34,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:19:34,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:19:34,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:19:34,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:19:34,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:19:34,587 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 10:19:34,612 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:19:34,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:19:34,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:19:34,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:19:34,614 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:19:34,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:19:34,615 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:19:34,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:19:34,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:19:34,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:19:34,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:19:34,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:19:34,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:19:34,616 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:19:34,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:19:34,617 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:19:34,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:19:34,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:19:34,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:19:34,618 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:19:34,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:19:34,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:19:34,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:19:34,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:19:34,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:19:34,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:19:34,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:19:34,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:19:34,619 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:19:34,620 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=0.1;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=0.1;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=0.1;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=0.1;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=0.1;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=0.1;log-additional-information=true; [2020-09-25 10:19:35,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:19:35,098 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:19:35,102 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:19:35,103 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:19:35,104 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:19:35,105 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 10:19:35,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/858306d05/d0ca02b7fcf648f197ade56d40e651e6/FLAG538285afc [2020-09-25 10:19:35,887 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:19:35,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 10:19:35,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/858306d05/d0ca02b7fcf648f197ade56d40e651e6/FLAG538285afc [2020-09-25 10:19:36,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/858306d05/d0ca02b7fcf648f197ade56d40e651e6 [2020-09-25 10:19:36,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:19:36,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:19:36,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:19:36,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:19:36,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:19:36,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:19:36" (1/1) ... [2020-09-25 10:19:36,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a91d473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:19:36, skipping insertion in model container [2020-09-25 10:19:36,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:19:36" (1/1) ... [2020-09-25 10:19:36,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:19:36,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:19:36,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:19:36,941 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:19:37,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:19:37,511 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:19:37,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:19:37 WrapperNode [2020-09-25 10:19:37,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:19:37,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:19:37,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:19:37,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:19:37,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:19:37" (1/1) ... [2020-09-25 10:19:37,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:19:37" (1/1) ... [2020-09-25 10:19:37,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:19:37" (1/1) ... [2020-09-25 10:19:37,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:19:37" (1/1) ... [2020-09-25 10:19:37,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:19:37" (1/1) ... [2020-09-25 10:19:37,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:19:37" (1/1) ... [2020-09-25 10:19:37,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:19:37" (1/1) ... [2020-09-25 10:19:37,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:19:37,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:19:37,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:19:37,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:19:37,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:19:37" (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 10:19:37,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:19:37,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:19:37,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 10:19:37,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:19:37,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:19:37,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 10:19:37,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 10:19:37,730 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 10:19:37,730 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 10:19:37,730 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 10:19:37,731 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 10:19:37,731 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 10:19:37,731 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 10:19:37,731 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 10:19:37,731 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 10:19:37,732 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 10:19:37,732 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 10:19:37,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:19:37,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:19:37,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:19:39,726 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:19:39,726 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 10:19:39,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:19:39 BoogieIcfgContainer [2020-09-25 10:19:39,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:19:39,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:19:39,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:19:39,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:19:39,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:19:36" (1/3) ... [2020-09-25 10:19:39,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c7dacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:19:39, skipping insertion in model container [2020-09-25 10:19:39,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:19:37" (2/3) ... [2020-09-25 10:19:39,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c7dacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:19:39, skipping insertion in model container [2020-09-25 10:19:39,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:19:39" (3/3) ... [2020-09-25 10:19:39,750 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 10:19:39,762 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:19:39,775 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 10:19:39,798 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 10:19:39,830 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:19:39,831 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:19:39,831 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:19:39,831 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:19:39,831 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:19:39,831 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:19:39,831 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:19:39,831 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:19:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states. [2020-09-25 10:19:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-25 10:19:39,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:19:39,914 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] [2020-09-25 10:19:39,915 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:19:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:19:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash -219806221, now seen corresponding path program 1 times [2020-09-25 10:19:39,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:19:39,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701037437] [2020-09-25 10:19:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:19:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:19:40,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:41,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:41,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:41,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:41,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:41,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:42,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:45,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:19:45,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-25 10:19:45,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:19:45,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-09-25 10:19:45,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:19:45,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:19:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:19:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-09-25 10:19:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-25 10:19:45,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-25 10:19:46,201 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 10:19:46,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:19:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:19:46,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:46,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:19:46,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 10:19:46,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:19:46,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-25 10:19:46,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:19:46,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:19:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:19:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:19:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:19:46,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:19:46,621 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 10:19:46,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701037437] [2020-09-25 10:19:46,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:19:46,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 10:19:46,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475303181] [2020-09-25 10:19:46,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 10:19:46,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:19:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 10:19:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:19:46,667 INFO L87 Difference]: Start difference. First operand 1127 states. Second operand 4 states. [2020-09-25 10:19:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:19:51,758 INFO L93 Difference]: Finished difference Result 1833 states and 2360 transitions. [2020-09-25 10:19:51,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 10:19:51,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 423 [2020-09-25 10:19:51,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:19:51,801 INFO L225 Difference]: With dead ends: 1833 [2020-09-25 10:19:51,802 INFO L226 Difference]: Without dead ends: 1303 [2020-09-25 10:19:51,810 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 10:19:51,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2020-09-25 10:19:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1296. [2020-09-25 10:19:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2020-09-25 10:19:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1545 transitions. [2020-09-25 10:19:51,953 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1545 transitions. Word has length 423 [2020-09-25 10:19:51,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:19:51,956 INFO L479 AbstractCegarLoop]: Abstraction has 1296 states and 1545 transitions. [2020-09-25 10:19:51,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 10:19:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1545 transitions. [2020-09-25 10:19:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-25 10:19:51,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:19:51,970 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] [2020-09-25 10:19:51,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:19:51,971 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:19:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:19:51,972 INFO L82 PathProgramCache]: Analyzing trace with hash -74379501, now seen corresponding path program 1 times [2020-09-25 10:19:51,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:19:51,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569261989] [2020-09-25 10:19:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:19:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:19:52,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:52,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:52,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:52,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:52,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:52,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:56,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:56,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:56,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:57,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:19:57,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-25 10:19:57,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 10:19:57,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 10:19:57,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:19:57,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:19:57,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 10:19:57,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-09-25 10:19:57,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 10:19:57,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:19:57,708 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 10:19:57,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:19:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:19:57,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:19:57,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:19:57,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 10:19:57,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:19:57,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 10:19:57,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:19:57,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:19:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:19:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:19:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:19:57,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:19:58,108 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 10:19:58,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569261989] [2020-09-25 10:19:58,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:19:58,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 10:19:58,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750494614] [2020-09-25 10:19:58,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:19:58,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:19:58,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:19:58,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:19:58,115 INFO L87 Difference]: Start difference. First operand 1296 states and 1545 transitions. Second operand 5 states. [2020-09-25 10:20:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:20:05,529 INFO L93 Difference]: Finished difference Result 3348 states and 4039 transitions. [2020-09-25 10:20:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:20:05,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 423 [2020-09-25 10:20:05,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:20:05,543 INFO L225 Difference]: With dead ends: 3348 [2020-09-25 10:20:05,544 INFO L226 Difference]: Without dead ends: 2358 [2020-09-25 10:20:05,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:20:05,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2020-09-25 10:20:05,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2236. [2020-09-25 10:20:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2236 states. [2020-09-25 10:20:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 2703 transitions. [2020-09-25 10:20:05,647 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 2703 transitions. Word has length 423 [2020-09-25 10:20:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:20:05,648 INFO L479 AbstractCegarLoop]: Abstraction has 2236 states and 2703 transitions. [2020-09-25 10:20:05,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:20:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 2703 transitions. [2020-09-25 10:20:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-09-25 10:20:05,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:20:05,655 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] [2020-09-25 10:20:05,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:20:05,656 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:20:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:20:05,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1675164715, now seen corresponding path program 1 times [2020-09-25 10:20:05,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:20:05,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206206099] [2020-09-25 10:20:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:20:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:05,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:05,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:06,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:06,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:06,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:06,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:09,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:09,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:10,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:20:10,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 431 [2020-09-25 10:20:10,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:20:10,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-09-25 10:20:10,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:20:10,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:20:10,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 10:20:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-09-25 10:20:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-25 10:20:10,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:20:11,300 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 10:20:11,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:20:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:11,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:11,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:20:11,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 10:20:11,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:20:11,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 10:20:11,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:20:11,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:20:11,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:20:11,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:20:11,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:20:11,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:20:11,597 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 10:20:11,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206206099] [2020-09-25 10:20:11,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:20:11,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 10:20:11,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587329716] [2020-09-25 10:20:11,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:20:11,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:20:11,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:20:11,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:20:11,600 INFO L87 Difference]: Start difference. First operand 2236 states and 2703 transitions. Second operand 5 states. [2020-09-25 10:20:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:20:19,066 INFO L93 Difference]: Finished difference Result 6157 states and 7488 transitions. [2020-09-25 10:20:19,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:20:19,067 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 424 [2020-09-25 10:20:19,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:20:19,086 INFO L225 Difference]: With dead ends: 6157 [2020-09-25 10:20:19,087 INFO L226 Difference]: Without dead ends: 4143 [2020-09-25 10:20:19,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:20:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2020-09-25 10:20:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4030. [2020-09-25 10:20:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4030 states. [2020-09-25 10:20:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 4890 transitions. [2020-09-25 10:20:19,262 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 4890 transitions. Word has length 424 [2020-09-25 10:20:19,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:20:19,263 INFO L479 AbstractCegarLoop]: Abstraction has 4030 states and 4890 transitions. [2020-09-25 10:20:19,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:20:19,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 4890 transitions. [2020-09-25 10:20:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-09-25 10:20:19,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:20:19,278 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] [2020-09-25 10:20:19,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:20:19,279 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:20:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:20:19,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1336613739, now seen corresponding path program 1 times [2020-09-25 10:20:19,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:20:19,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774360809] [2020-09-25 10:20:19,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:20:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:19,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:19,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:19,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:20,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:20,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:22,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:22,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:23,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:23,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking...