/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 false -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-eb0fd7c [2020-09-21 10:32:19,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:32:19,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:32:19,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:32:19,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:32:19,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:32:19,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:32:19,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:32:19,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:32:19,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:32:19,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:32:19,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:32:19,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:32:19,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:32:19,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:32:19,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:32:19,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:32:19,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:32:19,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:32:19,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:32:19,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:32:19,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:32:19,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:32:19,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:32:19,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:32:19,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:32:19,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:32:19,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:32:19,648 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 [2020-09-21 10:32:19,675 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:32:19,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:32:19,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:32:19,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:32:19,677 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:32:19,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:32:19,677 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:32:19,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:32:19,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:32:19,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:32:19,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:32:19,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:32:19,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:32:19,679 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:32:19,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:32:19,679 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:32:19,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:32:19,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:32:19,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:32:19,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:32:19,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:32:19,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:32:19,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:32:19,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:32:19,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:32:19,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:32:19,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:32:19,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:32:19,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:32:19,682 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 -> false [2020-09-21 10:32:20,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:32:20,213 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:32:20,217 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:32:20,219 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:32:20,220 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:32:20,221 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 10:32:20,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8609c017a/8d49d7b5be7142549a13507196254813/FLAG794c76ca3 [2020-09-21 10:32:21,143 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:32:21,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 10:32:21,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8609c017a/8d49d7b5be7142549a13507196254813/FLAG794c76ca3 [2020-09-21 10:32:21,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8609c017a/8d49d7b5be7142549a13507196254813 [2020-09-21 10:32:21,233 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:32:21,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:32:21,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:32:21,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:32:21,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:32:21,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:32:21" (1/1) ... [2020-09-21 10:32:21,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d1a539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:21, skipping insertion in model container [2020-09-21 10:32:21,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:32:21" (1/1) ... [2020-09-21 10:32:21,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:32:21,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:32:22,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:32:22,631 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:32:23,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:32:23,165 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:32:23,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:23 WrapperNode [2020-09-21 10:32:23,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:32:23,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:32:23,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:32:23,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:32:23,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:23" (1/1) ... [2020-09-21 10:32:23,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:23" (1/1) ... [2020-09-21 10:32:23,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:23" (1/1) ... [2020-09-21 10:32:23,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:23" (1/1) ... [2020-09-21 10:32:23,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:23" (1/1) ... [2020-09-21 10:32:23,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:23" (1/1) ... [2020-09-21 10:32:23,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:23" (1/1) ... [2020-09-21 10:32:23,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:32:23,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:32:23,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:32:23,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:32:23,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:23" (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 [2020-09-21 10:32:23,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:32:23,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:32:23,471 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:32:23,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:32:23,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:32:23,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 10:32:23,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 10:32:23,473 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 10:32:23,474 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:32:23,474 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:32:23,474 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 10:32:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 10:32:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 10:32:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 10:32:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 10:32:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 10:32:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 10:32:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 10:32:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:32:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:32:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:32:26,269 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:32:26,270 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:32:26,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:32:26 BoogieIcfgContainer [2020-09-21 10:32:26,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:32:26,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:32:26,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:32:26,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:32:26,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:32:21" (1/3) ... [2020-09-21 10:32:26,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b496361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:32:26, skipping insertion in model container [2020-09-21 10:32:26,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:23" (2/3) ... [2020-09-21 10:32:26,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b496361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:32:26, skipping insertion in model container [2020-09-21 10:32:26,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:32:26" (3/3) ... [2020-09-21 10:32:26,290 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 10:32:26,302 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:32:26,313 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:32:26,336 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:32:26,373 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:32:26,374 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:32:26,374 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:32:26,374 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:32:26,374 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:32:26,374 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:32:26,374 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:32:26,375 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:32:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-09-21 10:32:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-09-21 10:32:26,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:32:26,444 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] [2020-09-21 10:32:26,444 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:32:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:32:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-09-21 10:32:26,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:32:26,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579922090] [2020-09-21 10:32:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:32:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:28,662 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 10:32:28,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:32:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:32:28,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579922090] [2020-09-21 10:32:28,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:32:28,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:32:28,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204758701] [2020-09-21 10:32:28,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:32:28,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:32:28,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:32:28,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:32:28,935 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-09-21 10:32:38,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:32:38,135 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-09-21 10:32:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:32:38,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-09-21 10:32:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:32:38,175 INFO L225 Difference]: With dead ends: 2333 [2020-09-21 10:32:38,175 INFO L226 Difference]: Without dead ends: 1545 [2020-09-21 10:32:38,185 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 [2020-09-21 10:32:38,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-09-21 10:32:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-09-21 10:32:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-21 10:32:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-09-21 10:32:38,352 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-09-21 10:32:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:32:38,353 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-09-21 10:32:38,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:32:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-09-21 10:32:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 10:32:38,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:32:38,361 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] [2020-09-21 10:32:38,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:32:38,362 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:32:38,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:32:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-09-21 10:32:38,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:32:38,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820502597] [2020-09-21 10:32:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:32:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:39,553 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 10:32:39,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:32:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:32:39,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820502597] [2020-09-21 10:32:39,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:32:39,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:32:39,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829852242] [2020-09-21 10:32:39,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:32:39,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:32:39,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:32:39,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:32:39,876 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-09-21 10:32:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:32:49,259 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-09-21 10:32:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:32:49,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 10:32:49,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:32:49,282 INFO L225 Difference]: With dead ends: 4438 [2020-09-21 10:32:49,283 INFO L226 Difference]: Without dead ends: 3024 [2020-09-21 10:32:49,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:32:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-09-21 10:32:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-09-21 10:32:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-09-21 10:32:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-09-21 10:32:49,430 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-09-21 10:32:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:32:49,434 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-09-21 10:32:49,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:32:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-09-21 10:32:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 10:32:49,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:32:49,444 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] [2020-09-21 10:32:49,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:32:49,445 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:32:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:32:49,446 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-09-21 10:32:49,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:32:49,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976826584] [2020-09-21 10:32:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:32:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:50,082 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 10:32:50,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:32:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:32:50,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976826584] [2020-09-21 10:32:50,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:32:50,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:32:50,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934207932] [2020-09-21 10:32:50,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:32:50,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:32:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:32:50,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:32:50,329 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-09-21 10:32:59,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:32:59,325 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-09-21 10:32:59,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:32:59,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 10:32:59,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:32:59,356 INFO L225 Difference]: With dead ends: 8991 [2020-09-21 10:32:59,356 INFO L226 Difference]: Without dead ends: 6011 [2020-09-21 10:32:59,363 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 [2020-09-21 10:32:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-09-21 10:32:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-09-21 10:32:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-09-21 10:32:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-09-21 10:32:59,514 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-09-21 10:32:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:32:59,514 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-09-21 10:32:59,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:32:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-09-21 10:32:59,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-21 10:32:59,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:32:59,526 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] [2020-09-21 10:32:59,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:32:59,526 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:32:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:32:59,527 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-09-21 10:32:59,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:32:59,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315426819] [2020-09-21 10:32:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:32:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:00,222 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 10:33:00,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:33:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:33:00,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315426819] [2020-09-21 10:33:00,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:33:00,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:33:00,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146999075] [2020-09-21 10:33:00,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:33:00,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:33:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:33:00,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:33:00,370 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-09-21 10:33:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:33:09,184 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-09-21 10:33:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:33:09,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-09-21 10:33:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:33:09,209 INFO L225 Difference]: With dead ends: 9010 [2020-09-21 10:33:09,210 INFO L226 Difference]: Without dead ends: 6029 [2020-09-21 10:33:09,216 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 [2020-09-21 10:33:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-09-21 10:33:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-09-21 10:33:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-09-21 10:33:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-09-21 10:33:09,372 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-09-21 10:33:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:33:09,372 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-09-21 10:33:09,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:33:09,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-09-21 10:33:09,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-21 10:33:09,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:33:09,388 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] [2020-09-21 10:33:09,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:33:09,389 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:33:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:33:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-09-21 10:33:09,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:33:09,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054452073] [2020-09-21 10:33:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:33:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:10,265 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 10:33:10,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:33:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:33:10,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054452073] [2020-09-21 10:33:10,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:33:10,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:33:10,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675355955] [2020-09-21 10:33:10,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:33:10,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:33:10,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:33:10,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:33:10,447 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-09-21 10:33:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:33:19,219 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-09-21 10:33:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:33:19,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-09-21 10:33:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:33:19,245 INFO L225 Difference]: With dead ends: 8718 [2020-09-21 10:33:19,246 INFO L226 Difference]: Without dead ends: 5904 [2020-09-21 10:33:19,252 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 [2020-09-21 10:33:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-09-21 10:33:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-09-21 10:33:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-09-21 10:33:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-09-21 10:33:19,508 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-09-21 10:33:19,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:33:19,510 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-09-21 10:33:19,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:33:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-09-21 10:33:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-21 10:33:19,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:33:19,525 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] [2020-09-21 10:33:19,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:33:19,526 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:33:19,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:33:19,526 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-09-21 10:33:19,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:33:19,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908689495] [2020-09-21 10:33:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY