/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:55:11,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:55:11,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:55:11,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:55:11,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:55:11,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:55:11,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:55:11,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:55:11,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:55:11,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:55:11,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:55:11,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:55:11,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:55:11,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:55:11,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:55:11,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:55:11,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:55:11,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:55:11,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:55:11,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:55:11,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:55:11,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:55:11,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:55:11,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:55:11,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:55:11,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:55:11,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:55:11,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:55:11,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:55:11,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:55:11,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:55:11,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:55:11,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:55:11,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:55:11,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:55:11,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:55:11,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:55:11,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:55:11,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:55:11,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:55:11,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:55:11,850 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 06:55:11,895 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:55:11,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:55:11,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:55:11,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:55:11,899 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:55:11,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:55:11,899 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:55:11,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:55:11,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:55:11,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:55:11,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:55:11,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:55:11,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:55:11,902 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:55:11,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:55:11,902 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:55:11,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:55:11,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:55:11,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:55:11,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:55:11,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:55:11,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:55:11,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:55:11,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:55:11,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:55:11,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:55:11,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:55:11,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:55:11,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:55:11,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:55:12,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:55:12,374 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:55:12,378 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:55:12,380 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:55:12,381 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:55:12,382 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 06:55:12,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be2da4bcd/f4e57dc566ef4635a4882e190387a168/FLAGb39ed3bc7 [2020-09-25 06:55:13,121 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:55:13,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 06:55:13,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be2da4bcd/f4e57dc566ef4635a4882e190387a168/FLAGb39ed3bc7 [2020-09-25 06:55:13,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be2da4bcd/f4e57dc566ef4635a4882e190387a168 [2020-09-25 06:55:13,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:55:13,363 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:55:13,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:55:13,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:55:13,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:55:13,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:55:13" (1/1) ... [2020-09-25 06:55:13,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306b3b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:13, skipping insertion in model container [2020-09-25 06:55:13,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:55:13" (1/1) ... [2020-09-25 06:55:13,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:55:13,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:55:13,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:55:14,041 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:55:14,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:55:14,227 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:55:14,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:14 WrapperNode [2020-09-25 06:55:14,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:55:14,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:55:14,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:55:14,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:55:14,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:14" (1/1) ... [2020-09-25 06:55:14,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:14" (1/1) ... [2020-09-25 06:55:14,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:14" (1/1) ... [2020-09-25 06:55:14,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:14" (1/1) ... [2020-09-25 06:55:14,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:14" (1/1) ... [2020-09-25 06:55:14,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:14" (1/1) ... [2020-09-25 06:55:14,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:14" (1/1) ... [2020-09-25 06:55:14,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:55:14,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:55:14,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:55:14,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:55:14,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:14" (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 06:55:14,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:55:14,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:55:14,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 06:55:14,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:55:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:55:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 06:55:14,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 06:55:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 06:55:14,439 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 06:55:14,439 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:55:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 06:55:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 06:55:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 06:55:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 06:55:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 06:55:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 06:55:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 06:55:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 06:55:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:55:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:55:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:55:16,082 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:55:16,083 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 06:55:16,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:55:16 BoogieIcfgContainer [2020-09-25 06:55:16,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:55:16,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:55:16,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:55:16,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:55:16,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:55:13" (1/3) ... [2020-09-25 06:55:16,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43138b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:55:16, skipping insertion in model container [2020-09-25 06:55:16,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:14" (2/3) ... [2020-09-25 06:55:16,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43138b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:55:16, skipping insertion in model container [2020-09-25 06:55:16,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:55:16" (3/3) ... [2020-09-25 06:55:16,105 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 06:55:16,119 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:55:16,131 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:55:16,156 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:55:16,202 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:55:16,203 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:55:16,203 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:55:16,203 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:55:16,203 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:55:16,203 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:55:16,204 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:55:16,204 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:55:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-25 06:55:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-25 06:55:16,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:16,296 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] [2020-09-25 06:55:16,297 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-25 06:55:16,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:16,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605355940] [2020-09-25 06:55:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:17,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:17,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:17,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:18,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:18,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:18,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:21,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:21,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:22,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:22,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-25 06:55:22,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 06:55:22,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-09-25 06:55:22,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:22,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:22,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:55:22,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-25 06:55:22,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 06:55:22,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:55:22,625 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 06:55:22,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:22,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:22,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:22,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 06:55:22,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:22,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 06:55:22,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:22,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:22,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:22,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:22,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:22,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:23,095 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 06:55:23,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605355940] [2020-09-25 06:55:23,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:23,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:55:23,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353661352] [2020-09-25 06:55:23,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:55:23,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:23,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:55:23,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:55:23,138 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-25 06:55:28,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:28,607 INFO L93 Difference]: Finished difference Result 2068 states and 2752 transitions. [2020-09-25 06:55:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 06:55:28,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-25 06:55:28,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:28,641 INFO L225 Difference]: With dead ends: 2068 [2020-09-25 06:55:28,641 INFO L226 Difference]: Without dead ends: 1234 [2020-09-25 06:55:28,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:55:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2020-09-25 06:55:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1232. [2020-09-25 06:55:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1232 states. [2020-09-25 06:55:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1499 transitions. [2020-09-25 06:55:28,792 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1499 transitions. Word has length 407 [2020-09-25 06:55:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:28,793 INFO L479 AbstractCegarLoop]: Abstraction has 1232 states and 1499 transitions. [2020-09-25 06:55:28,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:55:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1499 transitions. [2020-09-25 06:55:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-25 06:55:28,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:28,800 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] [2020-09-25 06:55:28,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:55:28,801 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:28,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:28,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1185743993, now seen corresponding path program 1 times [2020-09-25 06:55:28,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:28,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973220870] [2020-09-25 06:55:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:28,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:29,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:29,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:29,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:29,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:29,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:31,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:32,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:33,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:33,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-25 06:55:33,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 06:55:33,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-09-25 06:55:33,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:33,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:33,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:55:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-09-25 06:55:33,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-09-25 06:55:33,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 06:55:34,620 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 06:55:34,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:34,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:34,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:34,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 06:55:34,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:34,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 06:55:34,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:34,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:34,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:34,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:34,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:34,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:34,904 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 06:55:34,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973220870] [2020-09-25 06:55:34,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:34,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:55:34,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011807822] [2020-09-25 06:55:34,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:55:34,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:34,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:55:34,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:55:34,909 INFO L87 Difference]: Start difference. First operand 1232 states and 1499 transitions. Second operand 5 states. [2020-09-25 06:55:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:40,019 INFO L93 Difference]: Finished difference Result 3229 states and 3979 transitions. [2020-09-25 06:55:40,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:55:40,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2020-09-25 06:55:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:40,039 INFO L225 Difference]: With dead ends: 3229 [2020-09-25 06:55:40,040 INFO L226 Difference]: Without dead ends: 2231 [2020-09-25 06:55:40,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:55:40,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2020-09-25 06:55:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2229. [2020-09-25 06:55:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2229 states. [2020-09-25 06:55:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 2728 transitions. [2020-09-25 06:55:40,199 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 2728 transitions. Word has length 408 [2020-09-25 06:55:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:40,201 INFO L479 AbstractCegarLoop]: Abstraction has 2229 states and 2728 transitions. [2020-09-25 06:55:40,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:55:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 2728 transitions. [2020-09-25 06:55:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-25 06:55:40,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:40,223 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] [2020-09-25 06:55:40,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:55:40,224 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:40,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1169505706, now seen corresponding path program 1 times [2020-09-25 06:55:40,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:40,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596012216] [2020-09-25 06:55:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:40,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:40,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:40,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:41,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:41,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:42,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:43,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:43,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:44,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:45,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:45,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-25 06:55:45,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 06:55:45,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-09-25 06:55:45,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:45,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:45,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:55:45,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-09-25 06:55:45,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-09-25 06:55:45,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:45,857 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 06:55:45,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:45,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:45,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:45,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 06:55:45,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:45,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 06:55:45,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:45,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:45,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:46,317 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 06:55:46,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596012216] [2020-09-25 06:55:46,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:46,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:55:46,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548609544] [2020-09-25 06:55:46,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:55:46,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:46,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:55:46,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:55:46,323 INFO L87 Difference]: Start difference. First operand 2229 states and 2728 transitions. Second operand 5 states. [2020-09-25 06:55:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:51,323 INFO L93 Difference]: Finished difference Result 5684 states and 6998 transitions. [2020-09-25 06:55:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:55:51,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-25 06:55:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:51,345 INFO L225 Difference]: With dead ends: 5684 [2020-09-25 06:55:51,345 INFO L226 Difference]: Without dead ends: 4086 [2020-09-25 06:55:51,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:55:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2020-09-25 06:55:51,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 4084. [2020-09-25 06:55:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4084 states. [2020-09-25 06:55:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4084 states to 4084 states and 4988 transitions. [2020-09-25 06:55:51,533 INFO L78 Accepts]: Start accepts. Automaton has 4084 states and 4988 transitions. Word has length 409 [2020-09-25 06:55:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:51,538 INFO L479 AbstractCegarLoop]: Abstraction has 4084 states and 4988 transitions. [2020-09-25 06:55:51,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:55:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4084 states and 4988 transitions. [2020-09-25 06:55:51,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-25 06:55:51,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:51,552 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] [2020-09-25 06:55:51,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:55:51,552 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:51,553 INFO L82 PathProgramCache]: Analyzing trace with hash 325014321, now seen corresponding path program 1 times [2020-09-25 06:55:51,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:51,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512045243] [2020-09-25 06:55:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:51,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:51,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:51,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:52,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:52,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:52,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:53,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:55,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:55,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:55,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:56,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:56,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:56,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-09-25 06:55:56,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 06:55:56,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 06:55:56,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:56,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:56,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:55:56,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 160 [2020-09-25 06:55:56,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-09-25 06:55:56,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:57,143 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 06:55:57,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:57,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:57,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:57,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 06:55:57,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:57,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 06:55:57,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:57,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:57,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:57,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:57,448 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 06:55:57,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512045243] [2020-09-25 06:55:57,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:57,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:55:57,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233784758] [2020-09-25 06:55:57,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:55:57,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:57,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:55:57,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:55:57,451 INFO L87 Difference]: Start difference. First operand 4084 states and 4988 transitions. Second operand 5 states.