/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.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:32:41,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:32:41,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:32:41,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:32:41,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:32:41,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:32:41,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:32:41,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:32:41,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:32:41,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:32:41,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:32:41,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:32:41,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:32:41,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:32:41,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:32:41,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:32:41,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:32:41,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:32:41,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:32:41,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:32:41,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:32:41,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:32:41,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:32:41,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:32:41,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:32:41,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:32:41,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:32:41,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:32:41,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:32:41,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:32:41,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:32:41,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:32:41,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:32:41,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:32:41,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:32:41,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:32:41,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:32:41,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:32:41,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:32:41,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:32:41,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:32:41,802 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 18:32:41,830 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:32:41,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:32:41,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:32:41,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:32:41,832 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:32:41,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:32:41,832 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:32:41,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:32:41,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:32:41,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:32:41,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:32:41,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:32:41,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:32:41,834 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:32:41,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:32:41,834 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:32:41,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:32:41,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:32:41,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:32:41,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:32:41,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:32:41,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:32:41,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:32:41,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:32:41,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:32:41,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:32:41,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:32:41,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:32:41,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:32:41,837 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 18:32:42,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:32:42,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:32:42,364 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:32:42,366 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:32:42,367 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:32:42,368 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 18:32:42,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6dde829d/72153508f4a74193b1850e0c5d2bae98/FLAG2b0e10c0c [2020-09-24 18:32:43,084 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:32:43,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 18:32:43,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6dde829d/72153508f4a74193b1850e0c5d2bae98/FLAG2b0e10c0c [2020-09-24 18:32:43,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6dde829d/72153508f4a74193b1850e0c5d2bae98 [2020-09-24 18:32:43,295 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:32:43,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:32:43,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:32:43,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:32:43,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:32:43,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:32:43" (1/1) ... [2020-09-24 18:32:43,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@684fb7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:43, skipping insertion in model container [2020-09-24 18:32:43,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:32:43" (1/1) ... [2020-09-24 18:32:43,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:32:43,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:32:44,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:32:44,070 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:32:44,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:32:44,581 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:32:44,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:44 WrapperNode [2020-09-24 18:32:44,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:32:44,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:32:44,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:32:44,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:32:44,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:44" (1/1) ... [2020-09-24 18:32:44,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:44" (1/1) ... [2020-09-24 18:32:44,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:44" (1/1) ... [2020-09-24 18:32:44,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:44" (1/1) ... [2020-09-24 18:32:44,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:44" (1/1) ... [2020-09-24 18:32:44,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:44" (1/1) ... [2020-09-24 18:32:44,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:44" (1/1) ... [2020-09-24 18:32:44,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:32:44,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:32:44,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:32:44,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:32:44,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:44" (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 18:32:44,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:32:44,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:32:44,797 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 18:32:44,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:32:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:32:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 18:32:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 18:32:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 18:32:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 18:32:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 18:32:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 18:32:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 18:32:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 18:32:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 18:32:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 18:32:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 18:32:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 18:32:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 18:32:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:32:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:32:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:32:46,658 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:32:46,659 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 18:32:46,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:32:46 BoogieIcfgContainer [2020-09-24 18:32:46,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:32:46,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:32:46,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:32:46,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:32:46,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:32:43" (1/3) ... [2020-09-24 18:32:46,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9b34f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:32:46, skipping insertion in model container [2020-09-24 18:32:46,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:44" (2/3) ... [2020-09-24 18:32:46,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9b34f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:32:46, skipping insertion in model container [2020-09-24 18:32:46,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:32:46" (3/3) ... [2020-09-24 18:32:46,682 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 18:32:46,695 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:32:46,707 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:32:46,731 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:32:46,771 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:32:46,772 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:32:46,772 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:32:46,772 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:32:46,772 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:32:46,773 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:32:46,773 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:32:46,773 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:32:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-24 18:32:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-24 18:32:46,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:32:46,851 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] [2020-09-24 18:32:46,851 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:32:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:32:46,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-24 18:32:46,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:32:46,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363759781] [2020-09-24 18:32:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:32:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:32:47,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:48,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:48,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:48,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:48,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:48,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:49,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:51,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:52,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:52,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:32:52,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-24 18:32:52,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:32:52,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-24 18:32:52,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:32:52,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:32:52,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 200 [2020-09-24 18:32:52,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-24 18:32:52,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 18:32:53,221 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 18:32:53,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:32:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:32:53,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:53,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:32:53,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 18:32:53,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:32:53,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 18:32:53,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:32:53,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:32:53,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:32:53,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:32:53,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:32:53,812 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 18:32:53,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363759781] [2020-09-24 18:32:53,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:32:53,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:32:53,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768890655] [2020-09-24 18:32:53,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:32:53,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:32:53,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:32:53,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:32:53,863 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 4 states. [2020-09-24 18:32:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:32:57,387 INFO L93 Difference]: Finished difference Result 1657 states and 2169 transitions. [2020-09-24 18:32:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:32:57,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-24 18:32:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:32:57,424 INFO L225 Difference]: With dead ends: 1657 [2020-09-24 18:32:57,424 INFO L226 Difference]: Without dead ends: 1241 [2020-09-24 18:32:57,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:32:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-24 18:32:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1234. [2020-09-24 18:32:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-24 18:32:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1513 transitions. [2020-09-24 18:32:57,567 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1513 transitions. Word has length 449 [2020-09-24 18:32:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:32:57,569 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1513 transitions. [2020-09-24 18:32:57,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:32:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1513 transitions. [2020-09-24 18:32:57,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-24 18:32:57,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:32:57,581 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] [2020-09-24 18:32:57,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:32:57,582 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:32:57,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:32:57,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1248222459, now seen corresponding path program 1 times [2020-09-24 18:32:57,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:32:57,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693096841] [2020-09-24 18:32:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:32:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:32:57,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:57,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:58,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:58,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:58,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:58,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:59,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:01,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:01,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:02,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:02,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-24 18:33:02,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:33:02,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 18:33:02,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:02,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:33:02,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 201 [2020-09-24 18:33:02,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-24 18:33:02,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:03,171 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 18:33:03,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:03,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:03,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:03,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 18:33:03,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:03,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-24 18:33:03,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:03,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:03,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:03,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:03,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:33:03,696 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 18:33:03,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693096841] [2020-09-24 18:33:03,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:03,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:33:03,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560099212] [2020-09-24 18:33:03,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:33:03,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:03,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:33:03,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:03,704 INFO L87 Difference]: Start difference. First operand 1234 states and 1513 transitions. Second operand 4 states. [2020-09-24 18:33:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:33:06,959 INFO L93 Difference]: Finished difference Result 2498 states and 3152 transitions. [2020-09-24 18:33:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:33:06,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-24 18:33:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:33:06,974 INFO L225 Difference]: With dead ends: 2498 [2020-09-24 18:33:06,974 INFO L226 Difference]: Without dead ends: 2052 [2020-09-24 18:33:06,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:06,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-09-24 18:33:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2040. [2020-09-24 18:33:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2040 states. [2020-09-24 18:33:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2543 transitions. [2020-09-24 18:33:07,068 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2543 transitions. Word has length 449 [2020-09-24 18:33:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:33:07,070 INFO L479 AbstractCegarLoop]: Abstraction has 2040 states and 2543 transitions. [2020-09-24 18:33:07,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:33:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2543 transitions. [2020-09-24 18:33:07,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-24 18:33:07,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:07,081 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] [2020-09-24 18:33:07,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:33:07,082 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:07,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1103013733, now seen corresponding path program 1 times [2020-09-24 18:33:07,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:07,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534687138] [2020-09-24 18:33:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:07,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:07,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:07,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:07,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:07,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:07,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:08,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:09,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:11,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:11,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:12,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:12,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-24 18:33:12,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 18:33:12,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-09-24 18:33:12,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:12,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:33:12,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-09-24 18:33:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 18:33:12,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:33:12,800 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 18:33:12,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:12,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:12,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:12,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 18:33:12,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:12,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 18:33:12,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:12,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:13,144 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 18:33:13,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534687138] [2020-09-24 18:33:13,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:13,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:33:13,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532821812] [2020-09-24 18:33:13,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:33:13,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:13,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:33:13,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:33:13,151 INFO L87 Difference]: Start difference. First operand 2040 states and 2543 transitions. Second operand 5 states. [2020-09-24 18:33:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:33:18,127 INFO L93 Difference]: Finished difference Result 5617 states and 7063 transitions. [2020-09-24 18:33:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:33:18,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-24 18:33:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:33:18,149 INFO L225 Difference]: With dead ends: 5617 [2020-09-24 18:33:18,150 INFO L226 Difference]: Without dead ends: 3789 [2020-09-24 18:33:18,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:33:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3789 states. [2020-09-24 18:33:18,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3789 to 3787. [2020-09-24 18:33:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3787 states. [2020-09-24 18:33:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 4729 transitions. [2020-09-24 18:33:18,317 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 4729 transitions. Word has length 449 [2020-09-24 18:33:18,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:33:18,318 INFO L479 AbstractCegarLoop]: Abstraction has 3787 states and 4729 transitions. [2020-09-24 18:33:18,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:33:18,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 4729 transitions. [2020-09-24 18:33:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-24 18:33:18,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:18,346 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] [2020-09-24 18:33:18,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:33:18,347 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1103174892, now seen corresponding path program 1 times [2020-09-24 18:33:18,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:18,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637856960] [2020-09-24 18:33:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:18,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:18,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:18,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:19,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:19,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:19,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:20,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:23,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:23,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-09-24 18:33:23,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:33:23,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-24 18:33:23,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:33:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-09-24 18:33:23,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 18:33:23,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:33:23,797 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 18:33:23,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:23,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:23,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:23,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 18:33:23,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:23,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-24 18:33:23,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:23,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:23,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:23,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:23,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:33:24,134 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 18:33:24,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637856960] [2020-09-24 18:33:24,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:24,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:33:24,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31471325] [2020-09-24 18:33:24,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:33:24,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:24,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:33:24,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:24,138 INFO L87 Difference]: Start difference. First operand 3787 states and 4729 transitions. Second operand 4 states.