/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:40:02,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:40:02,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:40:02,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:40:02,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:40:02,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:40:02,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:40:02,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:40:02,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:40:02,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:40:02,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:40:02,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:40:02,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:40:02,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:40:02,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:40:02,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:40:02,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:40:02,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:40:02,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:40:02,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:40:02,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:40:02,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:40:02,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:40:02,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:40:02,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:40:02,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:40:02,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:40:02,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:40:02,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:40:02,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:40:02,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:40:02,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:40:02,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:40:02,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:40:02,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:40:02,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:40:02,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:40:02,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:40:02,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:40:02,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:40:02,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:40:02,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 09:40:02,614 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:40:02,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:40:02,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:40:02,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:40:02,619 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:40:02,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:40:02,619 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:40:02,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:40:02,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:40:02,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:40:02,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:40:02,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:40:02,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:40:02,621 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:40:02,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:40:02,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:40:02,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:40:02,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:40:02,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:40:02,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:40:02,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:40:02,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:40:02,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:40:02,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:40:02,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:40:02,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:40:02,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:40:02,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:40:02,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:40:02,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:40:02,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:40:02,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:40:02,964 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:40:02,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:40:02,967 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:40:02,968 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-14 09:40:03,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8f327775/5b96f2362d904de88cd7aedfbc5d3ed4/FLAG7e68ff8fd [2020-10-14 09:40:03,897 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:40:03,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-14 09:40:03,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8f327775/5b96f2362d904de88cd7aedfbc5d3ed4/FLAG7e68ff8fd [2020-10-14 09:40:04,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8f327775/5b96f2362d904de88cd7aedfbc5d3ed4 [2020-10-14 09:40:04,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:40:04,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:40:04,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:40:04,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:40:04,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:40:04,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:04" (1/1) ... [2020-10-14 09:40:04,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321ed854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:04, skipping insertion in model container [2020-10-14 09:40:04,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:04" (1/1) ... [2020-10-14 09:40:04,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:40:04,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:40:09,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:40:09,539 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:40:13,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:40:13,333 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:40:13,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13 WrapperNode [2020-10-14 09:40:13,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:40:13,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:40:13,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:40:13,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:40:13,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2020-10-14 09:40:13,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2020-10-14 09:40:13,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2020-10-14 09:40:13,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2020-10-14 09:40:13,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2020-10-14 09:40:13,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2020-10-14 09:40:13,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2020-10-14 09:40:13,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:40:13,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:40:13,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:40:13,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:40:13,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:40:14,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:40:14,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:40:14,070 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:40:14,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:40:14,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:40:14,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:40:14,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:40:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:40:14,073 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:40:14,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:40:14,073 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:40:14,074 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:40:14,074 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:40:14,074 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:40:14,074 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:40:14,075 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:40:14,075 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 09:40:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:40:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:40:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:40:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:40:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:40:28,763 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:40:28,764 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:40:28,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:28 BoogieIcfgContainer [2020-10-14 09:40:28,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:40:28,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:40:28,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:40:28,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:40:28,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:40:04" (1/3) ... [2020-10-14 09:40:28,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8637d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:28, skipping insertion in model container [2020-10-14 09:40:28,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (2/3) ... [2020-10-14 09:40:28,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8637d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:28, skipping insertion in model container [2020-10-14 09:40:28,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:28" (3/3) ... [2020-10-14 09:40:28,796 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-14 09:40:28,807 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:40:28,818 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:40:28,833 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:40:28,877 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:40:28,877 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:40:28,878 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:40:28,878 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:40:28,878 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:40:28,878 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:40:28,878 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:40:28,878 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:40:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6854 states. [2020-10-14 09:40:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-14 09:40:29,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:40:29,045 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] [2020-10-14 09:40:29,045 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:40:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:40:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash 433085375, now seen corresponding path program 1 times [2020-10-14 09:40:29,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:40:29,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169973928] [2020-10-14 09:40:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:40:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:40:30,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:30,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:31,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:32,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:32,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:33,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:33,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:34,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:35,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:40:35,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 398 [2020-10-14 09:40:35,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:40:35,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5138 [2020-10-14 09:40:35,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:40:35,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:40:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:40:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-14 09:40:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 09:40:35,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:40:37,141 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 490 [2020-10-14 09:40:37,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:40:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:40:37,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:37,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:40:37,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:40:37,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:40:37,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-14 09:40:37,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:40:37,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:40:37,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:40:37,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:40:37,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:40:37,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:40:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:40:37,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169973928] [2020-10-14 09:40:37,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:40:37,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:40:37,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254457502] [2020-10-14 09:40:37,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:40:37,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:40:37,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:40:37,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:40:37,807 INFO L87 Difference]: Start difference. First operand 6854 states. Second operand 4 states. [2020-10-14 09:40:39,028 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 498 [2020-10-14 09:41:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:41:51,120 INFO L93 Difference]: Finished difference Result 13754 states and 23827 transitions. [2020-10-14 09:41:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:41:51,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 392 [2020-10-14 09:41:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:41:51,196 INFO L225 Difference]: With dead ends: 13754 [2020-10-14 09:41:51,196 INFO L226 Difference]: Without dead ends: 9037 [2020-10-14 09:41:51,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:41:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9037 states. [2020-10-14 09:41:51,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9037 to 8931. [2020-10-14 09:41:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8931 states. [2020-10-14 09:41:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8931 states to 8931 states and 14812 transitions. [2020-10-14 09:41:51,620 INFO L78 Accepts]: Start accepts. Automaton has 8931 states and 14812 transitions. Word has length 392 [2020-10-14 09:41:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:41:51,627 INFO L479 AbstractCegarLoop]: Abstraction has 8931 states and 14812 transitions. [2020-10-14 09:41:51,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:41:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 8931 states and 14812 transitions. [2020-10-14 09:41:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-14 09:41:51,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:41:51,667 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] [2020-10-14 09:41:51,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:41:51,668 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:41:51,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:41:51,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1166964451, now seen corresponding path program 1 times [2020-10-14 09:41:51,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:41:51,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458175412] [2020-10-14 09:41:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:41:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:52,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:53,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:53,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:54,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:54,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:54,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:55,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:56,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:56,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:57,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:57,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:57,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 398 [2020-10-14 09:41:57,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 09:41:57,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5233 [2020-10-14 09:41:57,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:57,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:41:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 219 [2020-10-14 09:41:57,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 09:41:57,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:41:58,762 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 490 [2020-10-14 09:41:58,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:41:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:58,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:58,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:58,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:41:58,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:41:58,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-14 09:41:58,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:58,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:58,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:41:58,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:41:58,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:41:58,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:41:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:41:59,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458175412] [2020-10-14 09:41:59,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:41:59,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:41:59,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700420564] [2020-10-14 09:41:59,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:41:59,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:41:59,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:41:59,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:41:59,300 INFO L87 Difference]: Start difference. First operand 8931 states and 14812 transitions. Second operand 4 states. [2020-10-14 09:43:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:43:04,849 INFO L93 Difference]: Finished difference Result 18823 states and 31501 transitions. [2020-10-14 09:43:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:43:04,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 392 [2020-10-14 09:43:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:43:04,909 INFO L225 Difference]: With dead ends: 18823 [2020-10-14 09:43:04,909 INFO L226 Difference]: Without dead ends: 12150 [2020-10-14 09:43:04,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:43:04,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2020-10-14 09:43:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 11952. [2020-10-14 09:43:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11952 states. [2020-10-14 09:43:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11952 states to 11952 states and 19848 transitions. [2020-10-14 09:43:05,329 INFO L78 Accepts]: Start accepts. Automaton has 11952 states and 19848 transitions. Word has length 392 [2020-10-14 09:43:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:43:05,331 INFO L479 AbstractCegarLoop]: Abstraction has 11952 states and 19848 transitions. [2020-10-14 09:43:05,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:43:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 11952 states and 19848 transitions. [2020-10-14 09:43:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-14 09:43:05,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:43:05,368 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] [2020-10-14 09:43:05,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:43:05,369 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:43:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:43:05,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2141550527, now seen corresponding path program 1 times [2020-10-14 09:43:05,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:43:05,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485811626] [2020-10-14 09:43:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:43:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:05,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:05,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:06,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:06,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:07,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:07,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:07,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:08,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:08,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:08,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:09,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:09,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:09,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:10,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:10,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 398 [2020-10-14 09:43:10,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 09:43:10,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 09:43:10,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:10,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:43:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-14 09:43:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 09:43:10,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:43:12,057 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 490 [2020-10-14 09:43:12,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:43:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:12,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:12,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:12,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:43:12,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:43:12,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-14 09:43:12,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:12,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:12,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:43:12,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:43:12,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:43:12,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:43:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:43:12,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485811626] [2020-10-14 09:43:12,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:43:12,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:43:12,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240750693] [2020-10-14 09:43:12,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:43:12,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:43:12,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:43:12,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:43:12,367 INFO L87 Difference]: Start difference. First operand 11952 states and 19848 transitions. Second operand 4 states. [2020-10-14 09:43:13,480 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 494