/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=LOWLEXORDER --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.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:19:06,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:19:06,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:19:06,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:19:06,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:19:06,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:19:06,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:19:06,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:19:06,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:19:06,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:19:06,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:19:06,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:19:06,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:19:06,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:19:06,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:19:06,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:19:06,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:19:06,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:19:06,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:19:06,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:19:06,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:19:06,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:19:06,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:19:06,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:19:06,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:19:06,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:19:06,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:19:06,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:19:06,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:19:06,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:19:06,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:19:06,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:19:06,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:19:06,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:19:06,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:19:06,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:19:06,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:19:06,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:19:06,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:19:06,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:19:06,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:19:06,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:19:06,823 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:19:06,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:19:06,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:19:06,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:19:06,826 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:19:06,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:19:06,826 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:19:06,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:19:06,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:19:06,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:19:06,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:19:06,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:19:06,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:19:06,831 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:19:06,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:19:06,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:19:06,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:19:06,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:19:06,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:19:06,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:19:06,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:19:06,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:19:06,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:19:06,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:19:06,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:19:06,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:19:06,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:19:06,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:19:06,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:19:06,835 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:19:07,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:19:07,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:19:07,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:19:07,203 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:19:07,205 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:19:07,205 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 18:19:07,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b529ac18/a2638776d5d64d4dbef3942ddde5a490/FLAGcf138d91d [2020-08-21 18:19:08,014 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:19:08,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 18:19:08,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b529ac18/a2638776d5d64d4dbef3942ddde5a490/FLAGcf138d91d [2020-08-21 18:19:08,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b529ac18/a2638776d5d64d4dbef3942ddde5a490 [2020-08-21 18:19:08,140 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:19:08,141 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:19:08,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:19:08,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:19:08,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:19:08,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:19:08" (1/1) ... [2020-08-21 18:19:08,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fbc03b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:08, skipping insertion in model container [2020-08-21 18:19:08,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:19:08" (1/1) ... [2020-08-21 18:19:08,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:19:08,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:19:09,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:19:09,417 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:19:09,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:19:09,901 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:19:09,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:09 WrapperNode [2020-08-21 18:19:09,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:19:09,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:19:09,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:19:09,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:19:09,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:09" (1/1) ... [2020-08-21 18:19:09,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:09" (1/1) ... [2020-08-21 18:19:09,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:09" (1/1) ... [2020-08-21 18:19:09,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:09" (1/1) ... [2020-08-21 18:19:10,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:09" (1/1) ... [2020-08-21 18:19:10,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:09" (1/1) ... [2020-08-21 18:19:10,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:09" (1/1) ... [2020-08-21 18:19:10,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:19:10,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:19:10,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:19:10,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:19:10,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:19:10,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:19:10,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:19:10,252 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 18:19:10,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:19:10,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:19:10,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 18:19:10,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-21 18:19:10,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 18:19:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 18:19:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 18:19:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 18:19:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 18:19:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 18:19:10,258 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 18:19:10,258 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 18:19:10,259 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 18:19:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-21 18:19:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 18:19:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 18:19:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:19:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:19:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:19:12,969 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:19:12,970 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:19:12,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:19:12 BoogieIcfgContainer [2020-08-21 18:19:12,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:19:12,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:19:12,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:19:12,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:19:12,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:19:08" (1/3) ... [2020-08-21 18:19:12,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ee727e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:19:12, skipping insertion in model container [2020-08-21 18:19:12,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:09" (2/3) ... [2020-08-21 18:19:13,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ee727e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:19:12, skipping insertion in model container [2020-08-21 18:19:13,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:19:12" (3/3) ... [2020-08-21 18:19:13,002 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 18:19:13,014 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:19:13,026 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:19:13,040 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:19:13,075 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:19:13,075 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:19:13,075 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:19:13,076 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:19:13,076 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:19:13,076 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:19:13,076 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:19:13,076 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:19:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-08-21 18:19:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-21 18:19:13,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:19:13,165 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] [2020-08-21 18:19:13,165 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:19:13,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:19:13,175 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-08-21 18:19:13,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:19:13,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524859560] [2020-08-21 18:19:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:19:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:14,942 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 18:19:14,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:19:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:19:15,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524859560] [2020-08-21 18:19:15,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:19:15,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:19:15,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407502592] [2020-08-21 18:19:15,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:19:15,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:19:15,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:19:15,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:19:15,344 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-08-21 18:19:15,877 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-21 18:19:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:19:20,740 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-08-21 18:19:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:19:20,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-21 18:19:20,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:19:20,772 INFO L225 Difference]: With dead ends: 1489 [2020-08-21 18:19:20,773 INFO L226 Difference]: Without dead ends: 1273 [2020-08-21 18:19:20,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:19:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-08-21 18:19:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-08-21 18:19:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-08-21 18:19:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-08-21 18:19:20,922 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-08-21 18:19:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:19:20,924 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-08-21 18:19:20,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:19:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-08-21 18:19:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-21 18:19:20,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:19:20,933 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] [2020-08-21 18:19:20,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:19:20,933 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:19:20,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:19:20,934 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-08-21 18:19:20,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:19:20,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321311457] [2020-08-21 18:19:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:19:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:21,783 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 18:19:21,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:19:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:19:21,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321311457] [2020-08-21 18:19:21,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:19:21,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:19:21,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071510063] [2020-08-21 18:19:21,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:19:21,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:19:21,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:19:21,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:19:21,928 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-08-21 18:19:22,481 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-21 18:19:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:19:27,097 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-08-21 18:19:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:19:27,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-21 18:19:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:19:27,119 INFO L225 Difference]: With dead ends: 2607 [2020-08-21 18:19:27,120 INFO L226 Difference]: Without dead ends: 2225 [2020-08-21 18:19:27,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:19:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-08-21 18:19:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-08-21 18:19:27,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-08-21 18:19:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-08-21 18:19:27,274 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-08-21 18:19:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:19:27,277 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-08-21 18:19:27,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:19:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-08-21 18:19:27,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-21 18:19:27,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:19:27,298 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] [2020-08-21 18:19:27,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:19:27,299 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:19:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:19:27,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-08-21 18:19:27,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:19:27,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214433579] [2020-08-21 18:19:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:19:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:28,694 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 18:19:28,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:19:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:19:28,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214433579] [2020-08-21 18:19:28,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:19:28,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:19:28,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552346219] [2020-08-21 18:19:28,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:19:28,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:19:28,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:19:28,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:19:28,986 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-08-21 18:19:29,504 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-21 18:19:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:19:33,656 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-08-21 18:19:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:19:33,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-21 18:19:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:19:33,682 INFO L225 Difference]: With dead ends: 4715 [2020-08-21 18:19:33,682 INFO L226 Difference]: Without dead ends: 4049 [2020-08-21 18:19:33,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:19:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-08-21 18:19:33,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-08-21 18:19:33,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-08-21 18:19:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-08-21 18:19:33,837 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-08-21 18:19:33,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:19:33,838 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-08-21 18:19:33,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:19:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-08-21 18:19:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-21 18:19:33,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:19:33,850 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] [2020-08-21 18:19:33,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:19:33,850 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:19:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:19:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-08-21 18:19:33,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:19:33,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079747507] [2020-08-21 18:19:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:19:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:34,886 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 18:19:34,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:19:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:19:35,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079747507] [2020-08-21 18:19:35,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:19:35,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:19:35,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412316535] [2020-08-21 18:19:35,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:19:35,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:19:35,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:19:35,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:19:35,091 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-08-21 18:19:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:19:42,246 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-08-21 18:19:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:19:42,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-08-21 18:19:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:19:42,285 INFO L225 Difference]: With dead ends: 11998 [2020-08-21 18:19:42,285 INFO L226 Difference]: Without dead ends: 7966 [2020-08-21 18:19:42,293 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 [2020-08-21 18:19:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-08-21 18:19:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-08-21 18:19:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-08-21 18:19:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-08-21 18:19:42,641 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-08-21 18:19:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:19:42,641 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-08-21 18:19:42,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:19:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-08-21 18:19:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-21 18:19:42,662 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:19:42,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:19:42,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:19:42,663 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:19:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:19:42,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-08-21 18:19:42,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:19:42,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367590248] [2020-08-21 18:19:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:19:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:43,344 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 18:19:43,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:19:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:19:43,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367590248] [2020-08-21 18:19:43,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:19:43,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:19:43,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905911760] [2020-08-21 18:19:43,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:19:43,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:19:43,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:19:43,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:19:43,596 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 4 states. [2020-08-21 18:19:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:19:51,279 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-08-21 18:19:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 18:19:51,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-21 18:19:51,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:19:51,334 INFO L225 Difference]: With dead ends: 23441 [2020-08-21 18:19:51,334 INFO L226 Difference]: Without dead ends: 15606 [2020-08-21 18:19:51,350 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 [2020-08-21 18:19:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-08-21 18:19:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-08-21 18:19:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-08-21 18:19:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-08-21 18:19:51,827 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-08-21 18:19:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:19:51,827 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-08-21 18:19:51,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:19:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-08-21 18:19:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-21 18:19:51,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:19:51,861 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] [2020-08-21 18:19:51,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:19:51,866 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:19:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:19:51,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-08-21 18:19:51,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:19:51,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379121843] [2020-08-21 18:19:51,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:19:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:52,368 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 18:19:52,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:19:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:19:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:19:52,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379121843] [2020-08-21 18:19:52,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:19:52,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:19:52,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954742663] [2020-08-21 18:19:52,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:19:52,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:19:52,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:19:52,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:19:52,470 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 4 states. [2020-08-21 18:20:00,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:20:00,590 INFO L93 Difference]: Finished difference Result 46737 states and 71555 transitions. [2020-08-21 18:20:00,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 18:20:00,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-21 18:20:00,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:20:00,664 INFO L225 Difference]: With dead ends: 46737 [2020-08-21 18:20:00,664 INFO L226 Difference]: Without dead ends: 31175 [2020-08-21 18:20:00,696 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 [2020-08-21 18:20:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2020-08-21 18:20:02,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 15623. [2020-08-21 18:20:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-08-21 18:20:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23921 transitions. [2020-08-21 18:20:02,191 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23921 transitions. Word has length 328 [2020-08-21 18:20:02,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:20:02,191 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23921 transitions. [2020-08-21 18:20:02,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:20:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23921 transitions. [2020-08-21 18:20:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-21 18:20:02,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:20:02,221 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] [2020-08-21 18:20:02,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:20:02,221 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:20:02,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:20:02,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1133119755, now seen corresponding path program 1 times [2020-08-21 18:20:02,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:20:02,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879242157] [2020-08-21 18:20:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:20:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat