/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 --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 interpolation-heuristic=FIRST --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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:35:18,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:35:18,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:35:18,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:35:18,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:35:18,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:35:18,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:35:18,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:35:18,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:35:18,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:35:18,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:35:18,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:35:18,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:35:18,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:35:18,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:35:18,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:35:18,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:35:18,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:35:18,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:35:18,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:35:18,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:35:18,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:35:18,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:35:18,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:35:18,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:35:18,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:35:18,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:35:18,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:35:18,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:35:18,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:35:18,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:35:18,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:35:18,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:35:18,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:35:18,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:35:18,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:35:18,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:35:18,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:35:18,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:35:18,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:35:18,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:35:18,704 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 [2020-09-21 11:35:18,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:35:18,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:35:18,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:35:18,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:35:18,748 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:35:18,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:35:18,748 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:35:18,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:35:18,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:35:18,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:35:18,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:35:18,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:35:18,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:35:18,751 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:35:18,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:35:18,751 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:35:18,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:35:18,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:35:18,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:35:18,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:35:18,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:35:18,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:35:18,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:35:18,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:35:18,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:35:18,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:35:18,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:35:18,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:35:18,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:35:18,754 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:35:19,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:35:19,276 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:35:19,281 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:35:19,283 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:35:19,283 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:35:19,284 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-09-21 11:35:19,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d33553f9/1a603bea8db84b69900d3c7c3b9a7160/FLAG4abe19ef8 [2020-09-21 11:35:20,215 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:35:20,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-09-21 11:35:20,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d33553f9/1a603bea8db84b69900d3c7c3b9a7160/FLAG4abe19ef8 [2020-09-21 11:35:20,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d33553f9/1a603bea8db84b69900d3c7c3b9a7160 [2020-09-21 11:35:20,763 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:35:20,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:35:20,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:35:20,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:35:20,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:35:20,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:35:20" (1/1) ... [2020-09-21 11:35:20,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2055e8b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:20, skipping insertion in model container [2020-09-21 11:35:20,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:35:20" (1/1) ... [2020-09-21 11:35:20,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:35:21,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:35:23,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:35:23,564 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:35:25,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:35:25,785 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:35:25,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:25 WrapperNode [2020-09-21 11:35:25,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:35:25,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:35:25,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:35:25,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:35:25,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:25" (1/1) ... [2020-09-21 11:35:25,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:25" (1/1) ... [2020-09-21 11:35:25,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:25" (1/1) ... [2020-09-21 11:35:25,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:25" (1/1) ... [2020-09-21 11:35:25,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:25" (1/1) ... [2020-09-21 11:35:26,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:25" (1/1) ... [2020-09-21 11:35:26,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:25" (1/1) ... [2020-09-21 11:35:26,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:35:26,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:35:26,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:35:26,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:35:26,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:25" (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 [2020-09-21 11:35:26,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:35:26,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:35:26,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:35:26,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:35:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:35:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 11:35:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 11:35:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 11:35:26,251 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:35:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:35:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 11:35:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 11:35:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 11:35:26,253 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 11:35:26,253 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 11:35:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 11:35:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-21 11:35:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 11:35:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 11:35:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:35:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:35:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:35:33,273 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:35:33,274 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:35:33,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:35:33 BoogieIcfgContainer [2020-09-21 11:35:33,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:35:33,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:35:33,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:35:33,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:35:33,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:35:20" (1/3) ... [2020-09-21 11:35:33,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534f0562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:35:33, skipping insertion in model container [2020-09-21 11:35:33,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:25" (2/3) ... [2020-09-21 11:35:33,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534f0562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:35:33, skipping insertion in model container [2020-09-21 11:35:33,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:35:33" (3/3) ... [2020-09-21 11:35:33,298 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-09-21 11:35:33,311 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:35:33,324 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-09-21 11:35:33,347 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-21 11:35:33,390 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:35:33,390 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:35:33,391 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:35:33,391 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:35:33,391 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:35:33,391 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:35:33,391 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:35:33,391 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:35:33,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-09-21 11:35:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-09-21 11:35:33,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:33,489 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] [2020-09-21 11:35:33,489 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-09-21 11:35:33,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:33,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369083715] [2020-09-21 11:35:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:34,364 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:34,364 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:34,365 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:34,365 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:34,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-09-21 11:35:34,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:34,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-21 11:35:34,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:34,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:35:34,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-09-21 11:35:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 11:35:34,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:35,595 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 409 [2020-09-21 11:35:35,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:35,617 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:35,617 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:35,618 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:35,618 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:35,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:35,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:35,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:35,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:35,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:35,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:35,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:35,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:35,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369083715] [2020-09-21 11:35:35,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:35,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:35:35,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291799522] [2020-09-21 11:35:35,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:35:35,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:35,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:35:35,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:35:35,802 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 5 states. [2020-09-21 11:35:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:55,575 INFO L93 Difference]: Finished difference Result 4483 states and 7776 transitions. [2020-09-21 11:35:55,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:35:55,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-09-21 11:35:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:55,626 INFO L225 Difference]: With dead ends: 4483 [2020-09-21 11:35:55,626 INFO L226 Difference]: Without dead ends: 2511 [2020-09-21 11:35:55,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:35:55,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-09-21 11:35:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-09-21 11:35:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-09-21 11:35:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4317 transitions. [2020-09-21 11:35:55,841 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4317 transitions. Word has length 322 [2020-09-21 11:35:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:55,843 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4317 transitions. [2020-09-21 11:35:55,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:35:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4317 transitions. [2020-09-21 11:35:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-09-21 11:35:55,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:55,856 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] [2020-09-21 11:35:55,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:35:55,859 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:55,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1448784548, now seen corresponding path program 1 times [2020-09-21 11:35:55,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:55,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512613037] [2020-09-21 11:35:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:56,233 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:56,234 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:56,234 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:56,234 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:56,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 393 [2020-09-21 11:35:56,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:56,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:35:56,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:35:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 148 [2020-09-21 11:35:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-21 11:35:56,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:57,340 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 409 [2020-09-21 11:35:57,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:57,360 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:57,360 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:57,360 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:57,361 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:57,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:57,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:57,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:57,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:57,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:57,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:57,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:57,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:57,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512613037] [2020-09-21 11:35:57,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:57,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:35:57,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673120118] [2020-09-21 11:35:57,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:35:57,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:57,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:35:57,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:57,841 INFO L87 Difference]: Start difference. First operand 2511 states and 4317 transitions. Second operand 4 states. [2020-09-21 11:35:59,073 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 411