/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=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:32:57,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:32:57,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:32:57,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:32:57,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:32:57,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:32:57,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:32:57,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:32:57,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:32:57,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:32:57,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:32:57,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:32:57,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:32:57,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:32:57,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:32:57,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:32:57,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:32:57,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:32:57,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:32:57,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:32:57,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:32:57,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:32:57,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:32:57,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:32:57,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:32:57,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:32:57,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:32:57,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:32:57,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:32:57,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:32:57,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:32:57,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:32:57,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:32:57,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:32:57,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:32:57,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:32:57,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:32:57,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:32:57,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:32:57,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:32:57,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:32:57,863 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 [2020-09-24 18:32:57,887 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:32:57,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:32:57,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:32:57,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:32:57,889 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:32:57,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:32:57,890 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:32:57,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:32:57,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:32:57,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:32:57,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:32:57,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:32:57,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:32:57,891 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:32:57,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:32:57,891 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:32:57,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:32:57,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:32:57,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:32:57,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:32:57,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:32:57,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:32:57,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:32:57,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:32:57,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:32:57,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:32:57,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:32:57,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:32:57,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:32:57,898 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:32:58,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:32:58,391 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:32:58,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:32:58,399 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:32:58,401 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:32:58,402 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 18:32:58,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10fbb6122/4659406052234b149e55bb9d4cff1352/FLAG5bfa98653 [2020-09-24 18:32:59,273 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:32:59,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 18:32:59,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10fbb6122/4659406052234b149e55bb9d4cff1352/FLAG5bfa98653 [2020-09-24 18:32:59,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10fbb6122/4659406052234b149e55bb9d4cff1352 [2020-09-24 18:32:59,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:32:59,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:32:59,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:32:59,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:32:59,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:32:59,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:32:59" (1/1) ... [2020-09-24 18:32:59,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be8a381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:59, skipping insertion in model container [2020-09-24 18:32:59,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:32:59" (1/1) ... [2020-09-24 18:32:59,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:32:59,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:33:00,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:33:00,816 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:33:01,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:33:01,292 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:33:01,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:33:01 WrapperNode [2020-09-24 18:33:01,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:33:01,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:33:01,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:33:01,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:33:01,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:33:01" (1/1) ... [2020-09-24 18:33:01,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:33:01" (1/1) ... [2020-09-24 18:33:01,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:33:01" (1/1) ... [2020-09-24 18:33:01,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:33:01" (1/1) ... [2020-09-24 18:33:01,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:33:01" (1/1) ... [2020-09-24 18:33:01,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:33:01" (1/1) ... [2020-09-24 18:33:01,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:33:01" (1/1) ... [2020-09-24 18:33:01,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:33:01,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:33:01,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:33:01,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:33:01,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:33:01" (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 [2020-09-24 18:33:01,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:33:01,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:33:01,592 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 18:33:01,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:33:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:33:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 18:33:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 18:33:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 18:33:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 18:33:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 18:33:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 18:33:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 18:33:01,596 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 18:33:01,596 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 18:33:01,596 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 18:33:01,597 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 18:33:01,597 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-24 18:33:01,597 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 18:33:01,597 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 18:33:01,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:33:01,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:33:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:33:04,977 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:33:04,978 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 18:33:04,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:33:04 BoogieIcfgContainer [2020-09-24 18:33:04,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:33:04,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:33:04,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:33:04,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:33:04,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:32:59" (1/3) ... [2020-09-24 18:33:05,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e3f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:33:05, skipping insertion in model container [2020-09-24 18:33:05,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:33:01" (2/3) ... [2020-09-24 18:33:05,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e3f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:33:05, skipping insertion in model container [2020-09-24 18:33:05,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:33:04" (3/3) ... [2020-09-24 18:33:05,004 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 18:33:05,020 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:33:05,034 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:33:05,062 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:33:05,107 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:33:05,108 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:33:05,108 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:33:05,108 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:33:05,108 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:33:05,108 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:33:05,109 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:33:05,109 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:33:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states. [2020-09-24 18:33:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-24 18:33:05,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:05,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:33:05,288 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:05,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:05,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1035850514, now seen corresponding path program 1 times [2020-09-24 18:33:05,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:05,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924065081] [2020-09-24 18:33:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:06,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:07,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:08,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:08,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:09,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:09,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:10,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:11,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:11,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:11,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-24 18:33:11,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:33:11,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-09-24 18:33:11,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:11,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:33:11,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 387 [2020-09-24 18:33:11,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 464 [2020-09-24 18:33:11,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:33:12,660 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-24 18:33:12,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:12,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:12,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:12,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 18:33:12,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:12,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-24 18:33:12,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:12,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:12,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:12,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:12,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:33:13,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924065081] [2020-09-24 18:33:13,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:13,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:33:13,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511851135] [2020-09-24 18:33:13,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:33:14,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:14,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:33:14,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:14,022 INFO L87 Difference]: Start difference. First operand 2018 states. Second operand 4 states. [2020-09-24 18:33:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:33:23,224 INFO L93 Difference]: Finished difference Result 3594 states and 4750 transitions. [2020-09-24 18:33:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:33:23,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 920 [2020-09-24 18:33:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:33:23,297 INFO L225 Difference]: With dead ends: 3594 [2020-09-24 18:33:23,297 INFO L226 Difference]: Without dead ends: 2873 [2020-09-24 18:33:23,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2020-09-24 18:33:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2860. [2020-09-24 18:33:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2860 states. [2020-09-24 18:33:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 3591 transitions. [2020-09-24 18:33:23,561 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 3591 transitions. Word has length 920 [2020-09-24 18:33:23,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:33:23,567 INFO L479 AbstractCegarLoop]: Abstraction has 2860 states and 3591 transitions. [2020-09-24 18:33:23,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:33:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 3591 transitions. [2020-09-24 18:33:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-24 18:33:23,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:23,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:33:23,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:33:23,641 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1742209874, now seen corresponding path program 1 times [2020-09-24 18:33:23,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:23,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360410830] [2020-09-24 18:33:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:24,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:24,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:25,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:26,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:26,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:26,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:27,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:27,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:28,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:28,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:29,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:29,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-24 18:33:29,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 18:33:29,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-09-24 18:33:29,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:33:29,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 283 [2020-09-24 18:33:29,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-09-24 18:33:29,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:29,996 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-24 18:33:29,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:30,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:30,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:30,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 18:33:30,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:30,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-24 18:33:30,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:30,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:30,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:30,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:30,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:33:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:33:30,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360410830] [2020-09-24 18:33:30,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:30,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:33:30,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713815067] [2020-09-24 18:33:30,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:33:30,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:30,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:33:30,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:33:30,749 INFO L87 Difference]: Start difference. First operand 2860 states and 3591 transitions. Second operand 5 states. [2020-09-24 18:33:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:33:45,845 INFO L93 Difference]: Finished difference Result 7774 states and 9866 transitions. [2020-09-24 18:33:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:33:45,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 920 [2020-09-24 18:33:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:33:45,872 INFO L225 Difference]: With dead ends: 7774 [2020-09-24 18:33:45,872 INFO L226 Difference]: Without dead ends: 5304 [2020-09-24 18:33:45,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:33:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2020-09-24 18:33:46,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 5302. [2020-09-24 18:33:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5302 states. [2020-09-24 18:33:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5302 states to 5302 states and 6696 transitions. [2020-09-24 18:33:46,053 INFO L78 Accepts]: Start accepts. Automaton has 5302 states and 6696 transitions. Word has length 920 [2020-09-24 18:33:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:33:46,054 INFO L479 AbstractCegarLoop]: Abstraction has 5302 states and 6696 transitions. [2020-09-24 18:33:46,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:33:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 5302 states and 6696 transitions. [2020-09-24 18:33:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2020-09-24 18:33:46,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:46,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:33:46,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:33:46,073 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:46,073 INFO L82 PathProgramCache]: Analyzing trace with hash 396307692, now seen corresponding path program 1 times [2020-09-24 18:33:46,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:46,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591230971] [2020-09-24 18:33:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:46,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:46,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:47,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:47,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:47,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:48,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:48,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:48,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking...