/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 enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -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.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:05:19,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:05:19,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:05:19,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:05:19,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:05:19,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:05:19,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:05:19,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:05:19,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:05:19,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:05:19,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:05:19,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:05:19,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:05:19,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:05:19,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:05:19,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:05:19,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:05:19,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:05:19,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:05:19,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:05:19,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:05:19,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:05:19,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:05:19,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:05:19,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:05:19,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:05:19,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:05:19,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:05:19,683 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 [2020-08-18 22:05:19,706 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:05:19,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:05:19,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:05:19,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:05:19,708 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:05:19,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:05:19,708 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:05:19,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:05:19,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:05:19,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:05:19,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:05:19,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:05:19,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:05:19,710 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:05:19,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:05:19,710 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:05:19,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:05:19,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:05:19,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:05:19,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:05:19,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:05:19,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:05:19,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:05:19,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:05:19,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:05:19,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:05:19,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:05:19,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:05:19,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:05:19,713 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 -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:05:20,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:05:20,042 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:05:20,045 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:05:20,046 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:05:20,047 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:05:20,048 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 22:05:20,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/575e60e3a/7ac706adc8b140b1b90c016433e05fe3/FLAG42a444030 [2020-08-18 22:05:20,783 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:05:20,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 22:05:20,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/575e60e3a/7ac706adc8b140b1b90c016433e05fe3/FLAG42a444030 [2020-08-18 22:05:20,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/575e60e3a/7ac706adc8b140b1b90c016433e05fe3 [2020-08-18 22:05:20,974 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:05:20,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:05:20,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:05:20,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:05:20,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:05:20,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:05:20" (1/1) ... [2020-08-18 22:05:20,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c39f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:20, skipping insertion in model container [2020-08-18 22:05:20,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:05:20" (1/1) ... [2020-08-18 22:05:20,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:05:21,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:05:22,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:05:22,187 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:05:22,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:05:22,799 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:05:22,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22 WrapperNode [2020-08-18 22:05:22,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:05:22,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:05:22,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:05:22,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:05:22,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ... [2020-08-18 22:05:22,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ... [2020-08-18 22:05:22,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ... [2020-08-18 22:05:22,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ... [2020-08-18 22:05:22,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ... [2020-08-18 22:05:22,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ... [2020-08-18 22:05:22,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ... [2020-08-18 22:05:23,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:05:23,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:05:23,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:05:23,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:05:23,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (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 [2020-08-18 22:05:23,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:05:23,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:05:23,111 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 22:05:23,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:05:23,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:05:23,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 22:05:23,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 22:05:23,112 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 22:05:23,112 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:05:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 22:05:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 22:05:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 22:05:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 22:05:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 22:05:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 22:05:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 22:05:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 22:05:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 22:05:23,115 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:05:23,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:05:23,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:05:25,823 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:05:25,823 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 22:05:25,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:05:25 BoogieIcfgContainer [2020-08-18 22:05:25,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:05:25,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:05:25,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:05:25,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:05:25,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:05:20" (1/3) ... [2020-08-18 22:05:25,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340dacc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:05:25, skipping insertion in model container [2020-08-18 22:05:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (2/3) ... [2020-08-18 22:05:25,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340dacc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:05:25, skipping insertion in model container [2020-08-18 22:05:25,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:05:25" (3/3) ... [2020-08-18 22:05:25,853 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 22:05:25,864 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:05:25,882 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:05:25,894 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:05:25,922 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:05:25,922 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:05:25,922 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:05:25,922 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:05:25,922 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:05:25,922 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:05:25,923 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:05:25,923 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:05:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-08-18 22:05:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-18 22:05:25,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:05:25,992 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] [2020-08-18 22:05:25,993 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:05:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:05:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-08-18 22:05:26,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:05:26,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141604624] [2020-08-18 22:05:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:05:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:05:28,099 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 22:05:28,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:05:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:05:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:05:28,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141604624] [2020-08-18 22:05:28,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:05:28,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:05:28,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295548867] [2020-08-18 22:05:28,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:05:28,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:05:28,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:05:28,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:05:28,401 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-08-18 22:05:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:05:36,441 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-08-18 22:05:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:05:36,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-08-18 22:05:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:05:36,473 INFO L225 Difference]: With dead ends: 2333 [2020-08-18 22:05:36,473 INFO L226 Difference]: Without dead ends: 1545 [2020-08-18 22:05:36,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:05:36,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-08-18 22:05:36,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-08-18 22:05:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-08-18 22:05:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-08-18 22:05:36,677 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-08-18 22:05:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:05:36,681 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-08-18 22:05:36,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:05:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-08-18 22:05:36,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 22:05:36,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:05:36,696 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] [2020-08-18 22:05:36,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:05:36,698 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:05:36,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:05:36,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-08-18 22:05:36,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:05:36,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039681111] [2020-08-18 22:05:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:05:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:05:37,662 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 22:05:37,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:05:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:05:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:05:38,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039681111] [2020-08-18 22:05:38,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:05:38,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 22:05:38,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860785874] [2020-08-18 22:05:38,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:05:38,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:05:38,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:05:38,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:05:38,128 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-08-18 22:05:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:05:46,419 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-08-18 22:05:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 22:05:46,419 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 22:05:46,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:05:46,437 INFO L225 Difference]: With dead ends: 4438 [2020-08-18 22:05:46,438 INFO L226 Difference]: Without dead ends: 3024 [2020-08-18 22:05:46,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:05:46,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-08-18 22:05:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-08-18 22:05:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-08-18 22:05:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-08-18 22:05:46,577 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-08-18 22:05:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:05:46,580 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-08-18 22:05:46,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:05:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-08-18 22:05:46,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 22:05:46,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:05:46,593 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] [2020-08-18 22:05:46,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:05:46,594 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:05:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:05:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-08-18 22:05:46,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:05:46,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840772783] [2020-08-18 22:05:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:05:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:05:47,161 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 22:05:47,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:05:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:05:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:05:47,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840772783] [2020-08-18 22:05:47,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:05:47,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 22:05:47,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105034444] [2020-08-18 22:05:47,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:05:47,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:05:47,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:05:47,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:05:47,330 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-08-18 22:05:55,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:05:55,565 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-08-18 22:05:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 22:05:55,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 22:05:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:05:55,591 INFO L225 Difference]: With dead ends: 8991 [2020-08-18 22:05:55,591 INFO L226 Difference]: Without dead ends: 6011 [2020-08-18 22:05:55,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:05:55,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-08-18 22:05:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-08-18 22:05:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-08-18 22:05:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-08-18 22:05:55,748 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-08-18 22:05:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:05:55,749 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-08-18 22:05:55,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:05:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-08-18 22:05:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 22:05:55,756 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:05:55,756 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] [2020-08-18 22:05:55,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:05:55,757 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:05:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:05:55,757 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-08-18 22:05:55,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:05:55,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47985663] [2020-08-18 22:05:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:05:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:05:56,344 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 22:05:56,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:05:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:05:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:05:56,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47985663] [2020-08-18 22:05:56,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:05:56,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 22:05:56,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98066226] [2020-08-18 22:05:56,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:05:56,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:05:56,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:05:56,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:05:56,470 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-08-18 22:06:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:06:04,608 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-08-18 22:06:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 22:06:04,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-18 22:06:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:06:04,633 INFO L225 Difference]: With dead ends: 9010 [2020-08-18 22:06:04,633 INFO L226 Difference]: Without dead ends: 6029 [2020-08-18 22:06:04,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:06:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-08-18 22:06:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-08-18 22:06:04,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-08-18 22:06:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-08-18 22:06:04,792 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-08-18 22:06:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:06:04,792 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-08-18 22:06:04,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:06:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-08-18 22:06:04,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-18 22:06:04,801 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:06:04,802 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] [2020-08-18 22:06:04,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:06:04,802 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:06:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:06:04,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-08-18 22:06:04,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:06:04,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165088769] [2020-08-18 22:06:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:06:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:06:05,493 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 22:06:05,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:06:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:06:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:06:05,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165088769] [2020-08-18 22:06:05,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:06:05,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 22:06:05,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226636167] [2020-08-18 22:06:05,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:06:05,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:06:05,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:06:05,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:06:05,670 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-08-18 22:06:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:06:13,763 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-08-18 22:06:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 22:06:13,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-18 22:06:13,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:06:13,784 INFO L225 Difference]: With dead ends: 8718 [2020-08-18 22:06:13,784 INFO L226 Difference]: Without dead ends: 5904 [2020-08-18 22:06:13,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:06:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-08-18 22:06:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-08-18 22:06:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-08-18 22:06:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-08-18 22:06:14,071 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-08-18 22:06:14,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:06:14,072 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-08-18 22:06:14,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:06:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-08-18 22:06:14,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-18 22:06:14,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:06:14,086 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] [2020-08-18 22:06:14,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:06:14,087 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:06:14,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:06:14,087 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-08-18 22:06:14,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:06:14,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494607912] [2020-08-18 22:06:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:06:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:06:14,977 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 22:06:14,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:06:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:06:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:06:15,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494607912] [2020-08-18 22:06:15,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:06:15,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:06:15,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039713542] [2020-08-18 22:06:15,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:06:15,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:06:15,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:06:15,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:06:15,108 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states. [2020-08-18 22:06:20,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:06:20,782 INFO L93 Difference]: Finished difference Result 13189 states and 20201 transitions. [2020-08-18 22:06:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:06:20,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-08-18 22:06:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:06:20,809 INFO L225 Difference]: With dead ends: 13189 [2020-08-18 22:06:20,810 INFO L226 Difference]: Without dead ends: 6775 [2020-08-18 22:06:20,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:06:20,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states.