/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:05:39,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:05:39,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:05:39,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:05:39,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:05:39,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:05:39,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:05:39,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:05:39,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:05:39,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:05:39,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:05:39,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:05:39,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:05:39,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:05:39,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:05:39,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:05:39,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:05:39,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:05:39,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:05:39,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:05:39,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:05:39,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:05:39,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:05:39,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:05:39,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:05:39,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:05:39,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:05:39,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:05:39,363 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 [2020-08-21 15:05:39,410 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:05:39,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:05:39,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:05:39,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:05:39,415 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:05:39,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:05:39,416 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:05:39,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:05:39,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:05:39,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:05:39,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:05:39,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:05:39,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:05:39,417 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:05:39,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:05:39,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:05:39,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:05:39,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:05:39,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:05:39,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:05:39,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:05:39,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:05:39,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:05:39,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:05:39,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:05:39,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:05:39,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:05:39,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:05:39,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:05:39,421 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:05:39,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:05:39,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:05:39,755 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:05:39,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:05:39,757 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:05:39,758 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-21 15:05:39,827 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c73a0e0c0/558c0c19b99144059c7c240ec808c06b/FLAG1b11aed9f [2020-08-21 15:05:40,579 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:05:40,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-21 15:05:40,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c73a0e0c0/558c0c19b99144059c7c240ec808c06b/FLAG1b11aed9f [2020-08-21 15:05:40,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c73a0e0c0/558c0c19b99144059c7c240ec808c06b [2020-08-21 15:05:40,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:05:40,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:05:40,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:05:40,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:05:40,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:05:40,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:05:40" (1/1) ... [2020-08-21 15:05:40,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2198ff71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:40, skipping insertion in model container [2020-08-21 15:05:40,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:05:40" (1/1) ... [2020-08-21 15:05:40,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:05:40,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:05:43,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:05:43,232 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:05:44,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:05:44,934 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:05:44,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44 WrapperNode [2020-08-21 15:05:44,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:05:44,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:05:44,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:05:44,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:05:44,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:44,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:45,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:45,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:45,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:45,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:45,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:45,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:05:45,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:05:45,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:05:45,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:05:45,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:05:45,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:05:45,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:05:45,299 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 15:05:45,299 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:05:45,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:05:45,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 15:05:45,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 15:05:45,300 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 15:05:45,301 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:05:45,301 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 15:05:45,301 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 15:05:45,301 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 15:05:45,302 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 15:05:45,302 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 15:05:45,302 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 15:05:45,302 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-21 15:05:45,303 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-21 15:05:45,303 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 15:05:45,303 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 15:05:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:05:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:05:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:05:51,441 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:05:51,441 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 15:05:51,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:05:51 BoogieIcfgContainer [2020-08-21 15:05:51,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:05:51,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:05:51,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:05:51,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:05:51,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:05:40" (1/3) ... [2020-08-21 15:05:51,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69acf409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:05:51, skipping insertion in model container [2020-08-21 15:05:51,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (2/3) ... [2020-08-21 15:05:51,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69acf409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:05:51, skipping insertion in model container [2020-08-21 15:05:51,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:05:51" (3/3) ... [2020-08-21 15:05:51,471 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-21 15:05:51,481 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:05:51,497 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-21 15:05:51,513 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-21 15:05:51,551 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:05:51,552 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:05:51,552 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:05:51,552 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:05:51,553 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:05:51,553 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:05:51,553 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:05:51,553 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:05:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-08-21 15:05:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-08-21 15:05:51,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:51,662 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] [2020-08-21 15:05:51,662 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:51,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:51,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-08-21 15:05:51,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:51,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134691925] [2020-08-21 15:05:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:53,564 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-08-21 15:05:53,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:53,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134691925] [2020-08-21 15:05:53,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:53,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:05:53,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496394644] [2020-08-21 15:05:53,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:05:53,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:05:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:53,741 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 5 states. [2020-08-21 15:06:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:08,988 INFO L93 Difference]: Finished difference Result 3956 states and 6884 transitions. [2020-08-21 15:06:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:06:08,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 290 [2020-08-21 15:06:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:09,037 INFO L225 Difference]: With dead ends: 3956 [2020-08-21 15:06:09,038 INFO L226 Difference]: Without dead ends: 2245 [2020-08-21 15:06:09,054 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 [2020-08-21 15:06:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-08-21 15:06:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-08-21 15:06:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-08-21 15:06:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3871 transitions. [2020-08-21 15:06:09,243 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3871 transitions. Word has length 290 [2020-08-21 15:06:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:06:09,247 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3871 transitions. [2020-08-21 15:06:09,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:06:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3871 transitions. [2020-08-21 15:06:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-08-21 15:06:09,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:06:09,265 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] [2020-08-21 15:06:09,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:06:09,266 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:06:09,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:06:09,267 INFO L82 PathProgramCache]: Analyzing trace with hash -875879150, now seen corresponding path program 1 times [2020-08-21 15:06:09,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:06:09,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004153016] [2020-08-21 15:06:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:06:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:11,000 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 394 [2020-08-21 15:06:11,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:06:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:06:11,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004153016] [2020-08-21 15:06:11,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:06:11,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:06:11,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879256997] [2020-08-21 15:06:11,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:06:11,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:06:11,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:06:11,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:06:11,299 INFO L87 Difference]: Start difference. First operand 2245 states and 3871 transitions. Second operand 4 states. [2020-08-21 15:06:12,071 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2020-08-21 15:06:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:34,989 INFO L93 Difference]: Finished difference Result 5464 states and 9356 transitions. [2020-08-21 15:06:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:06:34,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2020-08-21 15:06:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:35,014 INFO L225 Difference]: With dead ends: 5464 [2020-08-21 15:06:35,015 INFO L226 Difference]: Without dead ends: 3801 [2020-08-21 15:06:35,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:06:35,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-08-21 15:06:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3797. [2020-08-21 15:06:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3797 states. [2020-08-21 15:06:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6464 transitions. [2020-08-21 15:06:35,131 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6464 transitions. Word has length 349 [2020-08-21 15:06:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:06:35,133 INFO L479 AbstractCegarLoop]: Abstraction has 3797 states and 6464 transitions. [2020-08-21 15:06:35,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:06:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6464 transitions. [2020-08-21 15:06:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-08-21 15:06:35,149 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:06:35,150 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] [2020-08-21 15:06:35,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:06:35,154 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:06:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:06:35,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1287553668, now seen corresponding path program 1 times [2020-08-21 15:06:35,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:06:35,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085233935] [2020-08-21 15:06:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:06:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:36,213 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-08-21 15:06:36,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:06:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:06:36,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085233935] [2020-08-21 15:06:36,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:06:36,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:06:36,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156275913] [2020-08-21 15:06:36,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:06:36,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:06:36,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:06:36,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:06:36,356 INFO L87 Difference]: Start difference. First operand 3797 states and 6464 transitions. Second operand 4 states. [2020-08-21 15:06:37,118 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 398