/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=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:40:19,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:40:19,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:40:19,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:40:19,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:40:19,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:40:19,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:40:19,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:40:19,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:40:19,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:40:19,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:40:19,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:40:19,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:40:19,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:40:19,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:40:19,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:40:19,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:40:19,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:40:19,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:40:19,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:40:19,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:40:19,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:40:19,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:40:19,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:40:19,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 19:40:19,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:40:19,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:40:19,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:40:19,603 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 19:40:19,649 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:40:19,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:40:19,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:40:19,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:40:19,654 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:40:19,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:40:19,654 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:40:19,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:40:19,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:40:19,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:40:19,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:40:19,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:40:19,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:40:19,656 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:40:19,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:40:19,656 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:40:19,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:40:19,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:40:19,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:40:19,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:40:19,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:40:19,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:40:19,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:40:19,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:40:19,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:40:19,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:40:19,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:40:19,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:40:19,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:40:19,660 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=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:40:19,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:40:19,986 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:40:19,990 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:40:19,991 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:40:19,992 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:40:19,992 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 19:40:20,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/635244748/d912c9f4ecbc4d98b1de6027979884c5/FLAG22b393cde [2020-08-18 19:40:20,724 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:40:20,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 19:40:20,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/635244748/d912c9f4ecbc4d98b1de6027979884c5/FLAG22b393cde [2020-08-18 19:40:20,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/635244748/d912c9f4ecbc4d98b1de6027979884c5 [2020-08-18 19:40:20,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:40:20,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:40:20,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:40:20,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:40:20,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:40:20,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:40:20" (1/1) ... [2020-08-18 19:40:20,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a428c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:20, skipping insertion in model container [2020-08-18 19:40:20,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:40:20" (1/1) ... [2020-08-18 19:40:20,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:40:20,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:40:22,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:40:22,156 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:40:22,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:40:22,597 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:40:22,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:22 WrapperNode [2020-08-18 19:40:22,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:40:22,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:40:22,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:40:22,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:40:22,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:22" (1/1) ... [2020-08-18 19:40:22,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:22" (1/1) ... [2020-08-18 19:40:22,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:22" (1/1) ... [2020-08-18 19:40:22,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:22" (1/1) ... [2020-08-18 19:40:22,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:22" (1/1) ... [2020-08-18 19:40:22,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:22" (1/1) ... [2020-08-18 19:40:22,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:22" (1/1) ... [2020-08-18 19:40:22,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:40:22,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:40:22,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:40:22,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:40:22,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:22" (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 19:40:22,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:40:22,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:40:22,942 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 19:40:22,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:40:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:40:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 19:40:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 19:40:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 19:40:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 19:40:22,945 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 19:40:22,946 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 19:40:22,946 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 19:40:22,946 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 19:40:22,947 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 19:40:22,947 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 19:40:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 19:40:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 19:40:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 19:40:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:40:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:40:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:40:25,678 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:40:25,678 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 19:40:25,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:40:25 BoogieIcfgContainer [2020-08-18 19:40:25,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:40:25,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:40:25,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:40:25,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:40:25,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:40:20" (1/3) ... [2020-08-18 19:40:25,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4efb6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:40:25, skipping insertion in model container [2020-08-18 19:40:25,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:22" (2/3) ... [2020-08-18 19:40:25,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4efb6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:40:25, skipping insertion in model container [2020-08-18 19:40:25,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:40:25" (3/3) ... [2020-08-18 19:40:25,700 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 19:40:25,711 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:40:25,726 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:40:25,740 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:40:25,772 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:40:25,772 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:40:25,772 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:40:25,772 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:40:25,773 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:40:25,773 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:40:25,773 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:40:25,773 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:40:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-08-18 19:40:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-18 19:40:25,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:40:25,830 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 19:40:25,830 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:40:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:40:25,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-08-18 19:40:25,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:40:25,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724608934] [2020-08-18 19:40:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:40:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:40:28,067 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 19:40:28,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:40:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:40:28,393 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 19:40:28,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724608934] [2020-08-18 19:40:28,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:40:28,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 19:40:28,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680451186] [2020-08-18 19:40:28,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 19:40:28,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:40:28,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 19:40:28,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:40:28,442 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-08-18 19:40:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:40:37,496 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-08-18 19:40:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 19:40:37,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-08-18 19:40:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:40:37,531 INFO L225 Difference]: With dead ends: 2333 [2020-08-18 19:40:37,531 INFO L226 Difference]: Without dead ends: 1545 [2020-08-18 19:40:37,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:40:37,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-08-18 19:40:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-08-18 19:40:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-08-18 19:40:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-08-18 19:40:37,707 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-08-18 19:40:37,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:40:37,708 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-08-18 19:40:37,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 19:40:37,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-08-18 19:40:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 19:40:37,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:40:37,753 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 19:40:37,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:40:37,754 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:40:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:40:37,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-08-18 19:40:37,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:40:37,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542036261] [2020-08-18 19:40:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:40:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:40:38,724 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 19:40:38,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:40:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:40:39,135 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 19:40:39,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542036261] [2020-08-18 19:40:39,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:40:39,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 19:40:39,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213374823] [2020-08-18 19:40:39,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 19:40:39,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:40:39,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 19:40:39,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:40:39,141 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-08-18 19:40:50,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:40:50,069 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-08-18 19:40:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 19:40:50,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 19:40:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:40:50,097 INFO L225 Difference]: With dead ends: 4438 [2020-08-18 19:40:50,098 INFO L226 Difference]: Without dead ends: 3024 [2020-08-18 19:40:50,104 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 19:40:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-08-18 19:40:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-08-18 19:40:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-08-18 19:40:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-08-18 19:40:50,323 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-08-18 19:40:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:40:50,327 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-08-18 19:40:50,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 19:40:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-08-18 19:40:50,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 19:40:50,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:40:50,347 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 19:40:50,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:40:50,348 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:40:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:40:50,354 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-08-18 19:40:50,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:40:50,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389466398] [2020-08-18 19:40:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:40:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:40:51,389 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 19:40:51,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:40:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:40:51,532 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 19:40:51,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389466398] [2020-08-18 19:40:51,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:40:51,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 19:40:51,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162156276] [2020-08-18 19:40:51,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 19:40:51,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:40:51,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 19:40:51,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:40:51,546 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-08-18 19:41:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:41:00,238 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-08-18 19:41:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 19:41:00,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 19:41:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:41:00,271 INFO L225 Difference]: With dead ends: 8991 [2020-08-18 19:41:00,271 INFO L226 Difference]: Without dead ends: 6011 [2020-08-18 19:41:00,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:41:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-08-18 19:41:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-08-18 19:41:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-08-18 19:41:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-08-18 19:41:00,443 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-08-18 19:41:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:41:00,443 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-08-18 19:41:00,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 19:41:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-08-18 19:41:00,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 19:41:00,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:41:00,462 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 19:41:00,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:41:00,463 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:41:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:41:00,463 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-08-18 19:41:00,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:41:00,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885635462] [2020-08-18 19:41:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:41:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:41:01,141 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 19:41:01,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:41:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:41:01,299 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 19:41:01,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885635462] [2020-08-18 19:41:01,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:41:01,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 19:41:01,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832522554] [2020-08-18 19:41:01,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 19:41:01,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:41:01,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 19:41:01,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:41:01,302 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-08-18 19:41:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:41:09,725 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-08-18 19:41:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 19:41:09,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-18 19:41:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:41:09,759 INFO L225 Difference]: With dead ends: 9010 [2020-08-18 19:41:09,760 INFO L226 Difference]: Without dead ends: 6029 [2020-08-18 19:41:09,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:41:09,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-08-18 19:41:09,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-08-18 19:41:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-08-18 19:41:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-08-18 19:41:09,926 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-08-18 19:41:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:41:09,926 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-08-18 19:41:09,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 19:41:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-08-18 19:41:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-18 19:41:09,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:41:09,938 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 19:41:09,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:41:09,939 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:41:09,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:41:09,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-08-18 19:41:09,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:41:09,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323484970] [2020-08-18 19:41:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:41:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:41:10,733 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 19:41:10,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:41:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:41:10,923 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 19:41:10,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323484970] [2020-08-18 19:41:10,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:41:10,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 19:41:10,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577856943] [2020-08-18 19:41:10,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 19:41:10,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:41:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 19:41:10,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:41:10,927 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states.