/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=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:24:16,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:24:16,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:24:16,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:24:16,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:24:16,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:24:16,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:24:16,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:24:16,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:24:16,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:24:16,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:24:16,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:24:16,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:24:16,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:24:16,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:24:16,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:24:16,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:24:16,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:24:16,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:24:16,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:24:16,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:24:16,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:24:16,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:24:16,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:24:16,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 02:24:16,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:24:16,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:24:16,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:24:16,348 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 02:24:16,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:24:16,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:24:16,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:24:16,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:24:16,372 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:24:16,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:24:16,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:24:16,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:24:16,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:24:16,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:24:16,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:24:16,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:24:16,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:24:16,374 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:24:16,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:24:16,375 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:24:16,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:24:16,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:24:16,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:24:16,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:24:16,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:24:16,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:24:16,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:24:16,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:24:16,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:24:16,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:24:16,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:24:16,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:24:16,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:24:16,377 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=1.0;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=1.0;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=1.0;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=1.0;log-additional-information=true; [2020-08-22 02:24:16,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:24:16,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:24:16,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:24:16,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:24:16,693 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:24:16,693 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 02:24:16,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/332da8912/a8e6d70034e44f42ae8a10071e03f090/FLAG201cb5551 [2020-08-22 02:24:17,471 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:24:17,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 02:24:17,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/332da8912/a8e6d70034e44f42ae8a10071e03f090/FLAG201cb5551 [2020-08-22 02:24:17,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/332da8912/a8e6d70034e44f42ae8a10071e03f090 [2020-08-22 02:24:17,608 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:24:17,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:24:17,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:24:17,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:24:17,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:24:17,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:24:17" (1/1) ... [2020-08-22 02:24:17,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a0aa04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:17, skipping insertion in model container [2020-08-22 02:24:17,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:24:17" (1/1) ... [2020-08-22 02:24:17,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:24:17,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:24:18,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:24:18,792 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:24:19,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:24:19,259 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:24:19,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:19 WrapperNode [2020-08-22 02:24:19,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:24:19,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:24:19,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:24:19,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:24:19,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:19" (1/1) ... [2020-08-22 02:24:19,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:19" (1/1) ... [2020-08-22 02:24:19,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:19" (1/1) ... [2020-08-22 02:24:19,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:19" (1/1) ... [2020-08-22 02:24:19,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:19" (1/1) ... [2020-08-22 02:24:19,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:19" (1/1) ... [2020-08-22 02:24:19,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:19" (1/1) ... [2020-08-22 02:24:19,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:24:19,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:24:19,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:24:19,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:24:19,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:19" (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 02:24:19,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:24:19,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:24:19,517 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 02:24:19,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:24:19,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:24:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 02:24:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 02:24:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 02:24:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 02:24:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 02:24:19,519 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 02:24:19,519 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 02:24:19,519 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 02:24:19,519 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 02:24:19,519 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 02:24:19,520 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 02:24:19,520 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 02:24:19,520 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 02:24:19,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:24:19,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:24:19,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:24:22,177 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:24:22,177 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 02:24:22,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:24:22 BoogieIcfgContainer [2020-08-22 02:24:22,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:24:22,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:24:22,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:24:22,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:24:22,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:24:17" (1/3) ... [2020-08-22 02:24:22,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53883324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:24:22, skipping insertion in model container [2020-08-22 02:24:22,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:19" (2/3) ... [2020-08-22 02:24:22,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53883324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:24:22, skipping insertion in model container [2020-08-22 02:24:22,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:24:22" (3/3) ... [2020-08-22 02:24:22,207 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 02:24:22,219 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:24:22,238 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:24:22,253 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:24:22,292 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:24:22,292 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:24:22,293 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:24:22,293 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:24:22,293 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:24:22,293 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:24:22,293 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:24:22,294 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:24:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-08-22 02:24:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-22 02:24:22,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:22,384 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] [2020-08-22 02:24:22,384 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:22,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:22,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-08-22 02:24:22,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:22,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193091729] [2020-08-22 02:24:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:24,510 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 02:24:24,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:24,928 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 02:24:24,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193091729] [2020-08-22 02:24:24,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:24,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:24:24,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781279217] [2020-08-22 02:24:24,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:24:24,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:24,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:24:24,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:24:24,974 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-08-22 02:24:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:24:33,282 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-08-22 02:24:33,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 02:24:33,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-08-22 02:24:33,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:24:33,317 INFO L225 Difference]: With dead ends: 2333 [2020-08-22 02:24:33,317 INFO L226 Difference]: Without dead ends: 1545 [2020-08-22 02:24:33,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:24:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-08-22 02:24:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-08-22 02:24:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-08-22 02:24:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-08-22 02:24:33,476 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-08-22 02:24:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:24:33,478 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-08-22 02:24:33,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:24:33,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-08-22 02:24:33,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 02:24:33,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:33,485 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] [2020-08-22 02:24:33,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:24:33,485 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:33,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:33,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-08-22 02:24:33,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:33,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641137588] [2020-08-22 02:24:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:34,295 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 02:24:34,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:34,694 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 02:24:34,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641137588] [2020-08-22 02:24:34,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:34,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:24:34,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748610079] [2020-08-22 02:24:34,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:24:34,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:34,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:24:34,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:34,703 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-08-22 02:24:42,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:24:42,989 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-08-22 02:24:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:24:42,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 02:24:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:24:43,008 INFO L225 Difference]: With dead ends: 4438 [2020-08-22 02:24:43,008 INFO L226 Difference]: Without dead ends: 3024 [2020-08-22 02:24:43,013 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 [2020-08-22 02:24:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-08-22 02:24:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-08-22 02:24:43,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-08-22 02:24:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-08-22 02:24:43,142 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-08-22 02:24:43,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:24:43,145 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-08-22 02:24:43,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:24:43,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-08-22 02:24:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 02:24:43,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:43,193 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] [2020-08-22 02:24:43,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:24:43,194 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:43,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-08-22 02:24:43,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:43,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481146055] [2020-08-22 02:24:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:43,757 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 02:24:43,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:43,931 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 02:24:43,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481146055] [2020-08-22 02:24:43,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:43,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:24:43,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813369974] [2020-08-22 02:24:43,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:24:43,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:43,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:24:43,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:43,946 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-08-22 02:24:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:24:51,879 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-08-22 02:24:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:24:51,880 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 02:24:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:24:51,908 INFO L225 Difference]: With dead ends: 8991 [2020-08-22 02:24:51,908 INFO L226 Difference]: Without dead ends: 6011 [2020-08-22 02:24:51,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-08-22 02:24:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-08-22 02:24:52,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-08-22 02:24:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-08-22 02:24:52,069 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-08-22 02:24:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:24:52,069 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-08-22 02:24:52,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:24:52,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-08-22 02:24:52,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-22 02:24:52,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:52,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:24:52,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:24:52,082 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-08-22 02:24:52,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:52,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609852657] [2020-08-22 02:24:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:52,642 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 02:24:52,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:52,744 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 02:24:52,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609852657] [2020-08-22 02:24:52,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:52,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:24:52,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001830075] [2020-08-22 02:24:52,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:24:52,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:52,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:24:52,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:52,747 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-08-22 02:25:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:25:00,542 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-08-22 02:25:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:25:00,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-22 02:25:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:25:00,568 INFO L225 Difference]: With dead ends: 9010 [2020-08-22 02:25:00,568 INFO L226 Difference]: Without dead ends: 6029 [2020-08-22 02:25:00,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:25:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-08-22 02:25:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-08-22 02:25:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-08-22 02:25:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-08-22 02:25:00,725 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-08-22 02:25:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:25:00,726 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-08-22 02:25:00,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:25:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-08-22 02:25:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 02:25:00,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:25:00,736 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] [2020-08-22 02:25:00,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:25:00,737 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:25:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:25:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-08-22 02:25:00,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:25:00,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469001801] [2020-08-22 02:25:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:25:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:25:01,404 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 02:25:01,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:25:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:25:01,620 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 02:25:01,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469001801] [2020-08-22 02:25:01,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:25:01,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:25:01,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726955635] [2020-08-22 02:25:01,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:25:01,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:25:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:25:01,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:25:01,623 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-08-22 02:25:09,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:25:09,605 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-08-22 02:25:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:25:09,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-22 02:25:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:25:09,630 INFO L225 Difference]: With dead ends: 8718 [2020-08-22 02:25:09,630 INFO L226 Difference]: Without dead ends: 5904 [2020-08-22 02:25:09,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:25:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-08-22 02:25:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-08-22 02:25:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-08-22 02:25:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-08-22 02:25:09,891 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-08-22 02:25:09,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:25:09,891 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-08-22 02:25:09,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:25:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-08-22 02:25:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 02:25:09,905 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:25:09,905 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] [2020-08-22 02:25:09,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:25:09,906 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:25:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:25:09,907 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-08-22 02:25:09,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:25:09,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391305525] [2020-08-22 02:25:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:25:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:25:10,750 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 02:25:10,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:25:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:25:10,870 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 02:25:10,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391305525] [2020-08-22 02:25:10,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:25:10,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:25:10,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829515371] [2020-08-22 02:25:10,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:25:10,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:25:10,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:25:10,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:25:10,877 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states. [2020-08-22 02:25:17,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:25:17,020 INFO L93 Difference]: Finished difference Result 13189 states and 20201 transitions. [2020-08-22 02:25:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:25:17,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-08-22 02:25:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:25:17,052 INFO L225 Difference]: With dead ends: 13189 [2020-08-22 02:25:17,052 INFO L226 Difference]: Without dead ends: 6775 [2020-08-22 02:25:17,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:25:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2020-08-22 02:25:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 6773. [2020-08-22 02:25:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6773 states. [2020-08-22 02:25:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6773 states to 6773 states and 10350 transitions. [2020-08-22 02:25:17,292 INFO L78 Accepts]: Start accepts. Automaton has 6773 states and 10350 transitions. Word has length 328 [2020-08-22 02:25:17,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:25:17,293 INFO L479 AbstractCegarLoop]: Abstraction has 6773 states and 10350 transitions. [2020-08-22 02:25:17,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:25:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6773 states and 10350 transitions. [2020-08-22 02:25:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 02:25:17,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:25:17,314 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] [2020-08-22 02:25:17,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:25:17,315 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:25:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:25:17,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1619567406, now seen corresponding path program 1 times [2020-08-22 02:25:17,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:25:17,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369860996] [2020-08-22 02:25:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:25:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:25:17,822 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 02:25:17,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:25:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:25:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:25:17,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369860996] [2020-08-22 02:25:17,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:25:17,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:25:17,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172618229] [2020-08-22 02:25:17,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:25:17,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:25:17,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:25:17,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:25:17,926 INFO L87 Difference]: Start difference. First operand 6773 states and 10350 transitions. Second operand 4 states.