/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:32:30,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:32:30,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:32:30,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:32:30,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:32:30,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:32:30,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:32:30,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:32:30,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:32:30,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:32:30,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:32:30,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:32:30,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:32:30,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:32:30,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:32:30,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:32:30,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:32:30,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:32:30,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:32:30,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:32:30,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:32:30,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:32:30,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:32:30,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:32:30,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:32:30,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:32:30,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:32:30,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:32:30,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:32:30,387 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:32:30,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:32:30,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:32:30,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:32:30,390 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:32:30,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:32:30,391 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:32:30,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:32:30,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:32:30,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:32:30,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:32:30,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:32:30,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:32:30,393 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:32:30,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:32:30,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:32:30,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:32:30,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:32:30,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:32:30,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:32:30,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:32:30,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:32:30,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:32:30,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:32:30,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:32:30,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:32:30,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:32:30,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:32:30,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:32:30,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:32:30,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:32:30,868 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:32:30,872 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:32:30,874 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:32:30,874 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:32:30,876 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 10:32:30,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d09a70d9/7e6f7ce69af14ee1a1fcf18b818e3e62/FLAGbc2c6818c [2020-09-21 10:32:31,746 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:32:31,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 10:32:31,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d09a70d9/7e6f7ce69af14ee1a1fcf18b818e3e62/FLAGbc2c6818c [2020-09-21 10:32:31,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d09a70d9/7e6f7ce69af14ee1a1fcf18b818e3e62 [2020-09-21 10:32:31,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:32:31,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:32:31,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:32:31,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:32:31,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:32:31,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:32:31" (1/1) ... [2020-09-21 10:32:31,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@202a755b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:31, skipping insertion in model container [2020-09-21 10:32:31,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:32:31" (1/1) ... [2020-09-21 10:32:31,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:32:32,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:32:33,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:32:33,066 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:32:33,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:32:33,770 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:32:33,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:33 WrapperNode [2020-09-21 10:32:33,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:32:33,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:32:33,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:32:33,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:32:33,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:33" (1/1) ... [2020-09-21 10:32:33,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:33" (1/1) ... [2020-09-21 10:32:33,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:33" (1/1) ... [2020-09-21 10:32:33,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:33" (1/1) ... [2020-09-21 10:32:33,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:33" (1/1) ... [2020-09-21 10:32:33,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:33" (1/1) ... [2020-09-21 10:32:33,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:33" (1/1) ... [2020-09-21 10:32:33,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:32:33,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:32:33,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:32:33,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:32:33,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:32:34,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:32:34,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:32:34,109 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:32:34,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:32:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:32:34,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 10:32:34,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 10:32:34,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 10:32:34,110 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 10:32:34,110 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:32:34,111 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:32:34,111 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 10:32:34,111 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 10:32:34,111 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 10:32:34,112 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 10:32:34,112 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 10:32:34,112 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 10:32:34,112 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 10:32:34,112 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 10:32:34,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:32:34,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:32:34,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:32:36,860 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:32:36,861 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:32:36,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:32:36 BoogieIcfgContainer [2020-09-21 10:32:36,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:32:36,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:32:36,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:32:36,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:32:36,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:32:31" (1/3) ... [2020-09-21 10:32:36,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3f1ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:32:36, skipping insertion in model container [2020-09-21 10:32:36,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:33" (2/3) ... [2020-09-21 10:32:36,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3f1ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:32:36, skipping insertion in model container [2020-09-21 10:32:36,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:32:36" (3/3) ... [2020-09-21 10:32:36,889 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 10:32:36,901 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:32:36,916 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:32:36,939 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:32:36,979 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:32:36,979 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:32:36,979 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:32:36,979 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:32:36,979 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:32:36,980 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:32:36,980 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:32:36,980 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:32:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-09-21 10:32:37,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 10:32:37,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:32:37,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:32:37,054 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:32:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:32:37,062 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-09-21 10:32:37,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:32:37,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075414715] [2020-09-21 10:32:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:32:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:39,100 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 10:32:39,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:32:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:32:39,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075414715] [2020-09-21 10:32:39,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:32:39,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:32:39,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596884362] [2020-09-21 10:32:39,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:32:39,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:32:39,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:32:39,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:32:39,327 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-09-21 10:32:39,874 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 10:32:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:32:45,274 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-09-21 10:32:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:32:45,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 10:32:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:32:45,318 INFO L225 Difference]: With dead ends: 1489 [2020-09-21 10:32:45,318 INFO L226 Difference]: Without dead ends: 1273 [2020-09-21 10:32:45,333 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 [2020-09-21 10:32:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-09-21 10:32:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-09-21 10:32:45,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-09-21 10:32:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-09-21 10:32:45,532 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-09-21 10:32:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:32:45,539 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-09-21 10:32:45,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:32:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-09-21 10:32:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 10:32:45,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:32:45,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:32:45,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:32:45,554 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:32:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:32:45,554 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-09-21 10:32:45,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:32:45,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185550732] [2020-09-21 10:32:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:32:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:46,735 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 10:32:46,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:32:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:32:47,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185550732] [2020-09-21 10:32:47,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:32:47,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:32:47,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469439512] [2020-09-21 10:32:47,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:32:47,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:32:47,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:32:47,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:32:47,106 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-09-21 10:32:47,641 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 10:32:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:32:52,191 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-09-21 10:32:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:32:52,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 10:32:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:32:52,209 INFO L225 Difference]: With dead ends: 2607 [2020-09-21 10:32:52,210 INFO L226 Difference]: Without dead ends: 2225 [2020-09-21 10:32:52,218 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 [2020-09-21 10:32:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-09-21 10:32:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-09-21 10:32:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-09-21 10:32:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-09-21 10:32:52,325 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-09-21 10:32:52,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:32:52,326 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-09-21 10:32:52,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:32:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-09-21 10:32:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 10:32:52,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:32:52,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:32:52,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:32:52,339 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:32:52,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:32:52,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-09-21 10:32:52,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:32:52,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814044310] [2020-09-21 10:32:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:32:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:53,335 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 10:32:53,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:32:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:32:53,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814044310] [2020-09-21 10:32:53,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:32:53,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:32:53,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369247611] [2020-09-21 10:32:53,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:32:53,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:32:53,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:32:53,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:32:53,612 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-09-21 10:32:54,101 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 10:32:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:32:58,419 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-09-21 10:32:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:32:58,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 10:32:58,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:32:58,440 INFO L225 Difference]: With dead ends: 4715 [2020-09-21 10:32:58,441 INFO L226 Difference]: Without dead ends: 4049 [2020-09-21 10:32:58,444 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 [2020-09-21 10:32:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-09-21 10:32:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-09-21 10:32:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-09-21 10:32:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-09-21 10:32:58,577 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-09-21 10:32:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:32:58,578 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-09-21 10:32:58,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:32:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-09-21 10:32:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 10:32:58,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:32:58,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:32:58,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:32:58,590 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:32:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:32:58,591 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-09-21 10:32:58,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:32:58,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13484712] [2020-09-21 10:32:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:32:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:59,787 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 10:32:59,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:32:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:32:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:32:59,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13484712] [2020-09-21 10:32:59,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:32:59,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:32:59,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250747029] [2020-09-21 10:32:59,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:32:59,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:32:59,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:32:59,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:32:59,952 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-09-21 10:33:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:33:06,990 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-09-21 10:33:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:33:06,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-09-21 10:33:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:33:07,028 INFO L225 Difference]: With dead ends: 11998 [2020-09-21 10:33:07,028 INFO L226 Difference]: Without dead ends: 7966 [2020-09-21 10:33:07,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:33:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-09-21 10:33:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-09-21 10:33:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-09-21 10:33:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-09-21 10:33:07,353 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-09-21 10:33:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:33:07,354 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-09-21 10:33:07,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:33:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-09-21 10:33:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-21 10:33:07,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:33:07,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:33:07,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:33:07,375 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:33:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:33:07,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-09-21 10:33:07,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:33:07,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927031308] [2020-09-21 10:33:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:33:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:08,166 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 10:33:08,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:33:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:33:08,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927031308] [2020-09-21 10:33:08,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:33:08,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:33:08,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004049895] [2020-09-21 10:33:08,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:33:08,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:33:08,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:33:08,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:33:08,358 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 4 states. [2020-09-21 10:33:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:33:16,859 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-09-21 10:33:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:33:16,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-09-21 10:33:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:33:16,912 INFO L225 Difference]: With dead ends: 23441 [2020-09-21 10:33:16,912 INFO L226 Difference]: Without dead ends: 15606 [2020-09-21 10:33:16,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:33:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-09-21 10:33:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-09-21 10:33:17,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-09-21 10:33:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-09-21 10:33:17,536 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-09-21 10:33:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:33:17,537 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-09-21 10:33:17,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:33:17,537 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-09-21 10:33:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-21 10:33:17,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:33:17,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:33:17,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:33:17,567 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:33:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:33:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-09-21 10:33:17,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:33:17,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935096055] [2020-09-21 10:33:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:33:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:18,255 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 10:33:18,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:33:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:33:18,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935096055] [2020-09-21 10:33:18,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:33:18,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:33:18,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059219542] [2020-09-21 10:33:18,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:33:18,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:33:18,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:33:18,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:33:18,411 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 4 states. [2020-09-21 10:33:27,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:33:27,781 INFO L93 Difference]: Finished difference Result 46737 states and 71555 transitions. [2020-09-21 10:33:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:33:27,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-09-21 10:33:27,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:33:27,834 INFO L225 Difference]: With dead ends: 46737 [2020-09-21 10:33:27,834 INFO L226 Difference]: Without dead ends: 31175 [2020-09-21 10:33:27,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:33:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states.