/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:30:38,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:30:38,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:30:38,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:30:38,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:30:38,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:30:38,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:30:38,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:30:38,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:30:38,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:30:38,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:30:38,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:30:38,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:30:38,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:30:38,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:30:38,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:30:38,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:30:38,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:30:38,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:30:38,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:30:38,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:30:38,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:30:38,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:30:38,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:30:38,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 11:30:38,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:30:38,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:30:38,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:30:38,551 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 11:30:38,571 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:30:38,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:30:38,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:30:38,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:30:38,574 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:30:38,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:30:38,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:30:38,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:30:38,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:30:38,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:30:38,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:30:38,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:30:38,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:30:38,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:30:38,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:30:38,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:30:38,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:30:38,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:30:38,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:30:38,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:30:38,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:30:38,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:30:38,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:30:38,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:30:38,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:30:38,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:30:38,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:30:38,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:30:38,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:30:38,579 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 [2020-08-18 11:30:38,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:30:38,915 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:30:38,918 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:30:38,920 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:30:38,920 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:30:38,921 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 11:30:38,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4fb3bb4c/8fc0b4eaf5a746efa9c2a08bbcb673d8/FLAGcce8deeff [2020-08-18 11:30:39,661 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:30:39,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 11:30:39,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4fb3bb4c/8fc0b4eaf5a746efa9c2a08bbcb673d8/FLAGcce8deeff [2020-08-18 11:30:39,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4fb3bb4c/8fc0b4eaf5a746efa9c2a08bbcb673d8 [2020-08-18 11:30:39,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:30:39,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:30:39,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:30:39,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:30:39,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:30:39,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:30:39" (1/1) ... [2020-08-18 11:30:39,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653a9eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:39, skipping insertion in model container [2020-08-18 11:30:39,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:30:39" (1/1) ... [2020-08-18 11:30:39,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:30:39,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:30:40,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:30:40,884 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:30:41,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:30:41,739 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:30:41,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41 WrapperNode [2020-08-18 11:30:41,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:30:41,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:30:41,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:30:41,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:30:41,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ... [2020-08-18 11:30:41,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ... [2020-08-18 11:30:41,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ... [2020-08-18 11:30:41,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ... [2020-08-18 11:30:41,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ... [2020-08-18 11:30:41,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ... [2020-08-18 11:30:41,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ... [2020-08-18 11:30:41,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:30:41,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:30:41,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:30:41,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:30:41,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (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 11:30:42,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:30:42,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:30:42,058 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 11:30:42,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:30:42,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:30:42,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 11:30:42,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 11:30:42,060 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 11:30:42,060 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 11:30:42,061 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 11:30:42,061 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 11:30:42,062 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 11:30:42,062 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 11:30:42,062 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 11:30:42,062 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 11:30:42,063 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 11:30:42,063 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 11:30:42,063 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 11:30:42,064 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:30:42,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:30:42,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:30:44,914 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:30:44,914 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 11:30:44,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:30:44 BoogieIcfgContainer [2020-08-18 11:30:44,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:30:44,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:30:44,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:30:44,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:30:44,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:30:39" (1/3) ... [2020-08-18 11:30:44,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1630f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:30:44, skipping insertion in model container [2020-08-18 11:30:44,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (2/3) ... [2020-08-18 11:30:44,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1630f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:30:44, skipping insertion in model container [2020-08-18 11:30:44,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:30:44" (3/3) ... [2020-08-18 11:30:44,951 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 11:30:44,964 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:30:44,986 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:30:45,006 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:30:45,047 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:30:45,047 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:30:45,048 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:30:45,048 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:30:45,048 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:30:45,048 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:30:45,048 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:30:45,049 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:30:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-08-18 11:30:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-18 11:30:45,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:45,157 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 11:30:45,157 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:45,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:45,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-08-18 11:30:45,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:45,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83486781] [2020-08-18 11:30:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:47,436 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:30:47,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:47,689 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 11:30:47,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83486781] [2020-08-18 11:30:47,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:47,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:30:47,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694494319] [2020-08-18 11:30:47,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:30:47,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:47,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:30:47,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:30:47,717 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-08-18 11:30:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:30:56,279 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-08-18 11:30:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:30:56,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-08-18 11:30:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:30:56,314 INFO L225 Difference]: With dead ends: 2333 [2020-08-18 11:30:56,314 INFO L226 Difference]: Without dead ends: 1545 [2020-08-18 11:30:56,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:30:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-08-18 11:30:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-08-18 11:30:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-08-18 11:30:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-08-18 11:30:56,495 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-08-18 11:30:56,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:30:56,498 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-08-18 11:30:56,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:30:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-08-18 11:30:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 11:30:56,511 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:56,512 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 11:30:56,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:30:56,513 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:56,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:56,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-08-18 11:30:56,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:56,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741603290] [2020-08-18 11:30:56,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:57,668 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:30:57,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:57,979 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 11:30:57,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741603290] [2020-08-18 11:30:57,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:57,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:30:57,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735747246] [2020-08-18 11:30:57,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:30:57,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:57,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:30:57,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:30:57,991 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-08-18 11:31:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:31:07,570 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-08-18 11:31:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 11:31:07,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 11:31:07,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:31:07,592 INFO L225 Difference]: With dead ends: 4438 [2020-08-18 11:31:07,592 INFO L226 Difference]: Without dead ends: 3024 [2020-08-18 11:31:07,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:07,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-08-18 11:31:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-08-18 11:31:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-08-18 11:31:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-08-18 11:31:07,731 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-08-18 11:31:07,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:31:07,732 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-08-18 11:31:07,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:31:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-08-18 11:31:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 11:31:07,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:31:07,742 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 11:31:07,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:31:07,743 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:31:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:31:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-08-18 11:31:07,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:31:07,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516911506] [2020-08-18 11:31:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:31:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:08,467 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:31:08,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:31:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:08,667 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 11:31:08,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516911506] [2020-08-18 11:31:08,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:31:08,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:31:08,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126485883] [2020-08-18 11:31:08,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:31:08,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:31:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:31:08,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:08,679 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-08-18 11:31:17,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:31:17,585 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-08-18 11:31:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 11:31:17,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 11:31:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:31:17,613 INFO L225 Difference]: With dead ends: 8991 [2020-08-18 11:31:17,614 INFO L226 Difference]: Without dead ends: 6011 [2020-08-18 11:31:17,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-08-18 11:31:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-08-18 11:31:17,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-08-18 11:31:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-08-18 11:31:17,782 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-08-18 11:31:17,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:31:17,783 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-08-18 11:31:17,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:31:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-08-18 11:31:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 11:31:17,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:31:17,796 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 11:31:17,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:31:17,796 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:31:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:31:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-08-18 11:31:17,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:31:17,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418381256] [2020-08-18 11:31:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:31:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:18,531 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:31:18,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:31:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:18,684 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 11:31:18,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418381256] [2020-08-18 11:31:18,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:31:18,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:31:18,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316281449] [2020-08-18 11:31:18,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:31:18,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:31:18,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:31:18,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:18,688 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-08-18 11:31:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:31:27,511 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-08-18 11:31:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 11:31:27,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-18 11:31:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:31:27,536 INFO L225 Difference]: With dead ends: 9010 [2020-08-18 11:31:27,537 INFO L226 Difference]: Without dead ends: 6029 [2020-08-18 11:31:27,543 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 11:31:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-08-18 11:31:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-08-18 11:31:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-08-18 11:31:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-08-18 11:31:27,705 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-08-18 11:31:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:31:27,706 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-08-18 11:31:27,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:31:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-08-18 11:31:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-18 11:31:27,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:31:27,717 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 11:31:27,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:31:27,718 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:31:27,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:31:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-08-18 11:31:27,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:31:27,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720388701] [2020-08-18 11:31:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:31:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:28,491 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:31:28,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:31:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:28,636 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 11:31:28,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720388701] [2020-08-18 11:31:28,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:31:28,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:31:28,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063659814] [2020-08-18 11:31:28,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:31:28,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:31:28,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:31:28,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:28,639 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-08-18 11:31:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:31:37,001 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-08-18 11:31:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 11:31:37,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-18 11:31:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:31:37,027 INFO L225 Difference]: With dead ends: 8718 [2020-08-18 11:31:37,027 INFO L226 Difference]: Without dead ends: 5904 [2020-08-18 11:31:37,033 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 11:31:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-08-18 11:31:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-08-18 11:31:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-08-18 11:31:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-08-18 11:31:37,295 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-08-18 11:31:37,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:31:37,296 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-08-18 11:31:37,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:31:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-08-18 11:31:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-18 11:31:37,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:31:37,311 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 11:31:37,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:31:37,312 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:31:37,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:31:37,312 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-08-18 11:31:37,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:31:37,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222453396] [2020-08-18 11:31:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:31:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:38,272 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:31:38,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:31:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:38,380 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 11:31:38,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222453396] [2020-08-18 11:31:38,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:31:38,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:31:38,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191184269] [2020-08-18 11:31:38,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:31:38,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:31:38,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:31:38,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:31:38,384 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states.