/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.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 10:43:00,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 10:43:00,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 10:43:00,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 10:43:00,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 10:43:00,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 10:43:00,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 10:43:00,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 10:43:00,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 10:43:00,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 10:43:00,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 10:43:00,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 10:43:00,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 10:43:00,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 10:43:00,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 10:43:00,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 10:43:00,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 10:43:00,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 10:43:00,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 10:43:00,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 10:43:00,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 10:43:00,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 10:43:00,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 10:43:00,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 10:43:00,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 10:43:00,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 10:43:00,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 10:43:00,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 10:43:00,525 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 10:43:00,553 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 10:43:00,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 10:43:00,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 10:43:00,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 10:43:00,556 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 10:43:00,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 10:43:00,556 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 10:43:00,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 10:43:00,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 10:43:00,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 10:43:00,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 10:43:00,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 10:43:00,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 10:43:00,557 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 10:43:00,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 10:43:00,558 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 10:43:00,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 10:43:00,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 10:43:00,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 10:43:00,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 10:43:00,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 10:43:00,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 10:43:00,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 10:43:00,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 10:43:00,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 10:43:00,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 10:43:00,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 10:43:00,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 10:43:00,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 10:43:00,560 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 [2020-08-18 10:43:00,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 10:43:00,887 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 10:43:00,891 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 10:43:00,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 10:43:00,893 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 10:43:00,894 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 10:43:00,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f63343a3/5b03bc00bfbe4cb8879eeb38f5f193fa/FLAGf55cf9a4e [2020-08-18 10:43:01,722 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 10:43:01,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 10:43:01,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f63343a3/5b03bc00bfbe4cb8879eeb38f5f193fa/FLAGf55cf9a4e [2020-08-18 10:43:01,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f63343a3/5b03bc00bfbe4cb8879eeb38f5f193fa [2020-08-18 10:43:01,803 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 10:43:01,804 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 10:43:01,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 10:43:01,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 10:43:01,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 10:43:01,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:01" (1/1) ... [2020-08-18 10:43:01,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef7a733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:01, skipping insertion in model container [2020-08-18 10:43:01,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:01" (1/1) ... [2020-08-18 10:43:01,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 10:43:02,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 10:43:03,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:43:03,696 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 10:43:04,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:43:04,993 INFO L208 MainTranslator]: Completed translation [2020-08-18 10:43:04,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:04 WrapperNode [2020-08-18 10:43:04,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 10:43:04,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 10:43:04,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 10:43:04,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 10:43:05,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:04" (1/1) ... [2020-08-18 10:43:05,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:04" (1/1) ... [2020-08-18 10:43:05,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:04" (1/1) ... [2020-08-18 10:43:05,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:04" (1/1) ... [2020-08-18 10:43:05,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:04" (1/1) ... [2020-08-18 10:43:05,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:04" (1/1) ... [2020-08-18 10:43:05,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:04" (1/1) ... [2020-08-18 10:43:05,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 10:43:05,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 10:43:05,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 10:43:05,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 10:43:05,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:04" (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 10:43:05,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 10:43:05,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 10:43:05,288 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 10:43:05,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 10:43:05,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 10:43:05,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 10:43:05,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-18 10:43:05,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 10:43:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 10:43:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 10:43:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 10:43:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 10:43:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 10:43:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 10:43:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 10:43:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 10:43:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 10:43:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-18 10:43:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 10:43:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 10:43:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 10:43:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 10:43:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 10:43:09,560 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 10:43:09,560 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 10:43:09,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:09 BoogieIcfgContainer [2020-08-18 10:43:09,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 10:43:09,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 10:43:09,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 10:43:09,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 10:43:09,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:43:01" (1/3) ... [2020-08-18 10:43:09,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62bd68ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:09, skipping insertion in model container [2020-08-18 10:43:09,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:04" (2/3) ... [2020-08-18 10:43:09,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62bd68ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:09, skipping insertion in model container [2020-08-18 10:43:09,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:09" (3/3) ... [2020-08-18 10:43:09,582 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 10:43:09,593 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 10:43:09,602 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-18 10:43:09,616 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-18 10:43:09,645 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 10:43:09,646 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 10:43:09,646 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 10:43:09,646 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 10:43:09,646 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 10:43:09,646 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 10:43:09,646 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 10:43:09,646 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 10:43:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-08-18 10:43:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-08-18 10:43:09,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:43:09,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:09,726 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:43:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:43:09,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-08-18 10:43:09,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:43:09,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778088082] [2020-08-18 10:43:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:43:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:13,396 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-18 10:43:13,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:43:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:14,224 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 10:43:14,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778088082] [2020-08-18 10:43:14,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:43:14,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 10:43:14,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329752862] [2020-08-18 10:43:14,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 10:43:14,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:43:14,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 10:43:14,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 10:43:14,254 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 5 states. [2020-08-18 10:43:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:43:32,499 INFO L93 Difference]: Finished difference Result 4460 states and 8053 transitions. [2020-08-18 10:43:32,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 10:43:32,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-08-18 10:43:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:43:32,553 INFO L225 Difference]: With dead ends: 4460 [2020-08-18 10:43:32,553 INFO L226 Difference]: Without dead ends: 2963 [2020-08-18 10:43:32,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 10:43:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-08-18 10:43:32,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906. [2020-08-18 10:43:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2020-08-18 10:43:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4772 transitions. [2020-08-18 10:43:32,826 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4772 transitions. Word has length 493 [2020-08-18 10:43:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:43:32,831 INFO L479 AbstractCegarLoop]: Abstraction has 2906 states and 4772 transitions. [2020-08-18 10:43:32,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 10:43:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4772 transitions. [2020-08-18 10:43:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-08-18 10:43:32,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:43:32,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:32,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 10:43:32,851 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:43:32,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:43:32,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1236769392, now seen corresponding path program 1 times [2020-08-18 10:43:32,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:43:32,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593715083] [2020-08-18 10:43:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:43:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:34,725 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-18 10:43:34,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:43:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:35,335 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 10:43:35,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593715083] [2020-08-18 10:43:35,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:43:35,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 10:43:35,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652771805] [2020-08-18 10:43:35,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 10:43:35,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:43:35,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 10:43:35,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:43:35,343 INFO L87 Difference]: Start difference. First operand 2906 states and 4772 transitions. Second operand 4 states. [2020-08-18 10:43:55,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:43:55,998 INFO L93 Difference]: Finished difference Result 8439 states and 13819 transitions. [2020-08-18 10:43:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 10:43:56,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-08-18 10:43:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:43:56,030 INFO L225 Difference]: With dead ends: 8439 [2020-08-18 10:43:56,031 INFO L226 Difference]: Without dead ends: 5747 [2020-08-18 10:43:56,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:43:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2020-08-18 10:43:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692. [2020-08-18 10:43:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5692 states. [2020-08-18 10:43:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9324 transitions. [2020-08-18 10:43:56,267 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 9324 transitions. Word has length 495 [2020-08-18 10:43:56,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:43:56,269 INFO L479 AbstractCegarLoop]: Abstraction has 5692 states and 9324 transitions. [2020-08-18 10:43:56,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 10:43:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 9324 transitions. [2020-08-18 10:43:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-08-18 10:43:56,294 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:43:56,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:56,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 10:43:56,296 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:43:56,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:43:56,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1780546784, now seen corresponding path program 1 times [2020-08-18 10:43:56,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:43:56,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056021907] [2020-08-18 10:43:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:43:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:57,566 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-18 10:43:57,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:43:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:57,752 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 10:43:57,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056021907] [2020-08-18 10:43:57,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:43:57,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 10:43:57,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746531015] [2020-08-18 10:43:57,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 10:43:57,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:43:57,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 10:43:57,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:43:57,755 INFO L87 Difference]: Start difference. First operand 5692 states and 9324 transitions. Second operand 4 states.