/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:15:22,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:15:22,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:15:22,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:15:22,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:15:22,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:15:22,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:15:22,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:15:22,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:15:22,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:15:22,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:15:22,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:15:22,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:15:22,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:15:22,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:15:22,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:15:22,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:15:22,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:15:22,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:15:22,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:15:22,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:15:22,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:15:22,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:15:22,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:15:22,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:15:23,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:15:23,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:15:23,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:15:23,004 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 [2020-08-18 17:15:23,028 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:15:23,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:15:23,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:15:23,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:15:23,030 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:15:23,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:15:23,031 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:15:23,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:15:23,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:15:23,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:15:23,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:15:23,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:15:23,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:15:23,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:15:23,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:15:23,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:15:23,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:15:23,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:15:23,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:15:23,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:15:23,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:15:23,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:15:23,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:15:23,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:15:23,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:15:23,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:15:23,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:15:23,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:15:23,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:15:23,035 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=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:15:23,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:15:23,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:15:23,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:15:23,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:15:23,363 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:15:23,364 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 17:15:23,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af632b7da/6f6a5d2f4d584ecd8a0b8ddfdc031809/FLAGea0170fe8 [2020-08-18 17:15:24,119 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:15:24,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 17:15:24,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af632b7da/6f6a5d2f4d584ecd8a0b8ddfdc031809/FLAGea0170fe8 [2020-08-18 17:15:24,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af632b7da/6f6a5d2f4d584ecd8a0b8ddfdc031809 [2020-08-18 17:15:24,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:15:24,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:15:24,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:15:24,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:15:24,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:15:24,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:15:24" (1/1) ... [2020-08-18 17:15:24,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d022c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:24, skipping insertion in model container [2020-08-18 17:15:24,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:15:24" (1/1) ... [2020-08-18 17:15:24,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:15:24,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:15:25,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:15:25,506 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:15:25,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:15:26,025 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:15:26,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:26 WrapperNode [2020-08-18 17:15:26,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:15:26,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:15:26,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:15:26,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:15:26,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:26" (1/1) ... [2020-08-18 17:15:26,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:26" (1/1) ... [2020-08-18 17:15:26,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:26" (1/1) ... [2020-08-18 17:15:26,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:26" (1/1) ... [2020-08-18 17:15:26,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:26" (1/1) ... [2020-08-18 17:15:26,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:26" (1/1) ... [2020-08-18 17:15:26,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:26" (1/1) ... [2020-08-18 17:15:26,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:15:26,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:15:26,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:15:26,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:15:26,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:26" (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 [2020-08-18 17:15:26,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:15:26,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:15:26,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 17:15:26,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:15:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:15:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 17:15:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 17:15:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 17:15:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 17:15:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 17:15:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 17:15:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 17:15:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 17:15:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 17:15:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 17:15:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 17:15:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 17:15:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 17:15:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:15:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:15:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:15:29,412 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:15:29,412 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 17:15:29,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:15:29 BoogieIcfgContainer [2020-08-18 17:15:29,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:15:29,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:15:29,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:15:29,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:15:29,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:15:24" (1/3) ... [2020-08-18 17:15:29,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b568613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:15:29, skipping insertion in model container [2020-08-18 17:15:29,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:26" (2/3) ... [2020-08-18 17:15:29,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b568613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:15:29, skipping insertion in model container [2020-08-18 17:15:29,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:15:29" (3/3) ... [2020-08-18 17:15:29,444 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 17:15:29,457 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:15:29,477 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:15:29,494 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:15:29,532 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:15:29,532 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:15:29,532 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:15:29,532 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:15:29,533 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:15:29,533 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:15:29,533 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:15:29,533 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:15:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-08-18 17:15:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-18 17:15:29,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:15:29,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:15:29,611 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:15:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:15:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-08-18 17:15:29,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:15:29,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126975087] [2020-08-18 17:15:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:15:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:15:31,958 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 17:15:31,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:15:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:15:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:15:32,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126975087] [2020-08-18 17:15:32,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:15:32,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:15:32,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890082885] [2020-08-18 17:15:32,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:15:32,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:15:32,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:15:32,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:15:32,239 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-08-18 17:15:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:15:40,967 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-08-18 17:15:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:15:40,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-08-18 17:15:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:15:41,001 INFO L225 Difference]: With dead ends: 2333 [2020-08-18 17:15:41,002 INFO L226 Difference]: Without dead ends: 1545 [2020-08-18 17:15:41,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:15:41,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-08-18 17:15:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-08-18 17:15:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-08-18 17:15:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-08-18 17:15:41,161 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-08-18 17:15:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:15:41,162 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-08-18 17:15:41,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:15:41,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-08-18 17:15:41,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 17:15:41,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:15:41,170 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] [2020-08-18 17:15:41,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:15:41,170 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:15:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:15:41,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-08-18 17:15:41,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:15:41,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445881145] [2020-08-18 17:15:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:15:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:15:42,423 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 17:15:42,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:15:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:15:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:15:42,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445881145] [2020-08-18 17:15:42,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:15:42,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:15:42,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336874773] [2020-08-18 17:15:42,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:15:42,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:15:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:15:42,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:15:42,751 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-08-18 17:15:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:15:53,058 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-08-18 17:15:53,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:15:53,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 17:15:53,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:15:53,086 INFO L225 Difference]: With dead ends: 4438 [2020-08-18 17:15:53,087 INFO L226 Difference]: Without dead ends: 3024 [2020-08-18 17:15:53,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:15:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-08-18 17:15:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-08-18 17:15:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-08-18 17:15:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-08-18 17:15:53,294 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-08-18 17:15:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:15:53,298 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-08-18 17:15:53,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:15:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-08-18 17:15:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 17:15:53,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:15:53,317 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] [2020-08-18 17:15:53,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:15:53,318 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:15:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:15:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-08-18 17:15:53,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:15:53,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333721895] [2020-08-18 17:15:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:15:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:15:54,284 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 17:15:54,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:15:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:15:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:15:54,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333721895] [2020-08-18 17:15:54,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:15:54,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:15:54,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691816903] [2020-08-18 17:15:54,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:15:54,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:15:54,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:15:54,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:15:54,491 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-08-18 17:16:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:16:03,374 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-08-18 17:16:03,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:16:03,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 17:16:03,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:16:03,407 INFO L225 Difference]: With dead ends: 8991 [2020-08-18 17:16:03,407 INFO L226 Difference]: Without dead ends: 6011 [2020-08-18 17:16:03,413 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 [2020-08-18 17:16:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-08-18 17:16:03,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-08-18 17:16:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-08-18 17:16:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-08-18 17:16:03,575 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-08-18 17:16:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:16:03,576 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-08-18 17:16:03,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:16:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-08-18 17:16:03,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 17:16:03,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:16:03,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:16:03,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:16:03,586 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:16:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:16:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-08-18 17:16:03,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:16:03,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314445402] [2020-08-18 17:16:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:16:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:16:04,285 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 17:16:04,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:16:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:16:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:16:04,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314445402] [2020-08-18 17:16:04,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:16:04,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:16:04,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442964656] [2020-08-18 17:16:04,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:16:04,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:16:04,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:16:04,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:16:04,394 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-08-18 17:16:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:16:12,862 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-08-18 17:16:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:16:12,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-18 17:16:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:16:12,892 INFO L225 Difference]: With dead ends: 9010 [2020-08-18 17:16:12,892 INFO L226 Difference]: Without dead ends: 6029 [2020-08-18 17:16:12,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:16:12,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-08-18 17:16:13,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-08-18 17:16:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-08-18 17:16:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-08-18 17:16:13,096 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-08-18 17:16:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:16:13,097 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-08-18 17:16:13,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:16:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-08-18 17:16:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-18 17:16:13,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:16:13,108 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] [2020-08-18 17:16:13,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:16:13,109 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:16:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:16:13,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-08-18 17:16:13,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:16:13,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142752915] [2020-08-18 17:16:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:16:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:16:14,004 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 17:16:14,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:16:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:16:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:16:14,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142752915] [2020-08-18 17:16:14,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:16:14,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:16:14,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917573104] [2020-08-18 17:16:14,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:16:14,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:16:14,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:16:14,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:16:14,152 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-08-18 17:16:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:16:22,526 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-08-18 17:16:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:16:22,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-18 17:16:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:16:22,561 INFO L225 Difference]: With dead ends: 8718 [2020-08-18 17:16:22,561 INFO L226 Difference]: Without dead ends: 5904 [2020-08-18 17:16:22,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:16:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states.