/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:35:36,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:35:36,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:35:36,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:35:36,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:35:36,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:35:36,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:35:36,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:35:36,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:35:36,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:35:36,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:35:36,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:35:36,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:35:36,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:35:36,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:35:36,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:35:36,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:35:36,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:35:36,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:35:36,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:35:36,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:35:36,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:35:36,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:35:36,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:35:36,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:35:36,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:35:36,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:35:36,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:35:36,518 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 [2020-08-22 01:35:36,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:35:36,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:35:36,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:35:36,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:35:36,558 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:35:36,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:35:36,558 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:35:36,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:35:36,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:35:36,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:35:36,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:35:36,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:35:36,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:35:36,560 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:35:36,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:35:36,561 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:35:36,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:35:36,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:35:36,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:35:36,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:35:36,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:35:36,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:35:36,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:35:36,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:35:36,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:35:36,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:35:36,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:35:36,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:35:36,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:35:36,563 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:35:36,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:35:36,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:35:36,872 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:35:36,873 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:35:36,873 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:35:36,874 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-22 01:35:36,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d5277b55/b36d43600dc64e05874305fdb5259eba/FLAGb4ed42ea0 [2020-08-22 01:35:37,574 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:35:37,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-22 01:35:37,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d5277b55/b36d43600dc64e05874305fdb5259eba/FLAGb4ed42ea0 [2020-08-22 01:35:37,768 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d5277b55/b36d43600dc64e05874305fdb5259eba [2020-08-22 01:35:37,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:35:37,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:35:37,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:35:37,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:35:37,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:35:37,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:35:37" (1/1) ... [2020-08-22 01:35:37,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e64e3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:37, skipping insertion in model container [2020-08-22 01:35:37,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:35:37" (1/1) ... [2020-08-22 01:35:37,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:35:38,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:35:40,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:35:40,346 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:35:41,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:35:42,014 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:35:42,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:42 WrapperNode [2020-08-22 01:35:42,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:35:42,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:35:42,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:35:42,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:35:42,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:42" (1/1) ... [2020-08-22 01:35:42,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:42" (1/1) ... [2020-08-22 01:35:42,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:42" (1/1) ... [2020-08-22 01:35:42,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:42" (1/1) ... [2020-08-22 01:35:42,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:42" (1/1) ... [2020-08-22 01:35:42,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:42" (1/1) ... [2020-08-22 01:35:42,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:42" (1/1) ... [2020-08-22 01:35:42,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:35:42,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:35:42,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:35:42,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:35:42,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:42" (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 [2020-08-22 01:35:42,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:35:42,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:35:42,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 01:35:42,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:35:42,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:35:42,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 01:35:42,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 01:35:42,421 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 01:35:42,421 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 01:35:42,423 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 01:35:42,423 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 01:35:42,423 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 01:35:42,424 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 01:35:42,424 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 01:35:42,424 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 01:35:42,425 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 01:35:42,426 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-22 01:35:42,426 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 01:35:42,426 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 01:35:42,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:35:42,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:35:42,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:35:49,914 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:35:49,914 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 01:35:49,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:35:49 BoogieIcfgContainer [2020-08-22 01:35:49,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:35:49,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:35:49,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:35:49,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:35:49,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:35:37" (1/3) ... [2020-08-22 01:35:49,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c426caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:35:49, skipping insertion in model container [2020-08-22 01:35:49,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:42" (2/3) ... [2020-08-22 01:35:49,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c426caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:35:49, skipping insertion in model container [2020-08-22 01:35:49,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:35:49" (3/3) ... [2020-08-22 01:35:49,938 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-22 01:35:49,949 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:35:49,959 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-22 01:35:49,973 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-22 01:35:50,006 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:35:50,007 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:35:50,007 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:35:50,007 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:35:50,007 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:35:50,007 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:35:50,008 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:35:50,008 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:35:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-08-22 01:35:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-08-22 01:35:50,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:35:50,102 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] [2020-08-22 01:35:50,102 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:35:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:35:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-08-22 01:35:50,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:35:50,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619299] [2020-08-22 01:35:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:35:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:35:52,042 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-08-22 01:35:52,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:35:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:35:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:35:52,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619299] [2020-08-22 01:35:52,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:35:52,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:35:52,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448591599] [2020-08-22 01:35:52,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:35:52,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:35:52,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:35:52,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:35:52,259 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 5 states. [2020-08-22 01:36:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:08,688 INFO L93 Difference]: Finished difference Result 3956 states and 6884 transitions. [2020-08-22 01:36:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:36:08,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 290 [2020-08-22 01:36:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:08,740 INFO L225 Difference]: With dead ends: 3956 [2020-08-22 01:36:08,740 INFO L226 Difference]: Without dead ends: 2245 [2020-08-22 01:36:08,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:36:08,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-08-22 01:36:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-08-22 01:36:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-08-22 01:36:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3871 transitions. [2020-08-22 01:36:08,945 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3871 transitions. Word has length 290 [2020-08-22 01:36:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:08,948 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3871 transitions. [2020-08-22 01:36:08,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:36:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3871 transitions. [2020-08-22 01:36:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-08-22 01:36:08,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:08,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:36:08,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:36:08,965 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash -875879150, now seen corresponding path program 1 times [2020-08-22 01:36:08,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:08,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061522482] [2020-08-22 01:36:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:10,417 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-08-22 01:36:10,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:10,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061522482] [2020-08-22 01:36:10,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:10,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:36:10,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510937532] [2020-08-22 01:36:10,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:36:10,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:10,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:36:10,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:10,568 INFO L87 Difference]: Start difference. First operand 2245 states and 3871 transitions. Second operand 4 states. [2020-08-22 01:36:11,529 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2020-08-22 01:36:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:36,512 INFO L93 Difference]: Finished difference Result 5464 states and 9356 transitions. [2020-08-22 01:36:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:36:36,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2020-08-22 01:36:36,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:36,542 INFO L225 Difference]: With dead ends: 5464 [2020-08-22 01:36:36,542 INFO L226 Difference]: Without dead ends: 3801 [2020-08-22 01:36:36,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:36:36,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-08-22 01:36:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3797. [2020-08-22 01:36:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3797 states. [2020-08-22 01:36:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6464 transitions. [2020-08-22 01:36:36,660 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6464 transitions. Word has length 349 [2020-08-22 01:36:36,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:36,661 INFO L479 AbstractCegarLoop]: Abstraction has 3797 states and 6464 transitions. [2020-08-22 01:36:36,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:36:36,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6464 transitions. [2020-08-22 01:36:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-08-22 01:36:36,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:36,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:36:36,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:36:36,675 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:36,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1287553668, now seen corresponding path program 1 times [2020-08-22 01:36:36,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:36,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529531098] [2020-08-22 01:36:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat