/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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 10:43:07,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 10:43:07,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 10:43:07,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 10:43:07,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 10:43:07,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 10:43:07,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 10:43:07,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 10:43:07,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 10:43:07,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 10:43:07,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 10:43:07,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 10:43:07,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 10:43:07,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 10:43:07,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 10:43:07,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 10:43:07,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 10:43:07,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 10:43:07,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 10:43:07,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 10:43:07,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 10:43:07,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 10:43:07,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 10:43:07,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 10:43:07,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 10:43:07,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 10:43:07,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 10:43:07,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 10:43:07,400 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 10:43:07,445 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 10:43:07,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 10:43:07,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 10:43:07,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 10:43:07,447 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 10:43:07,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 10:43:07,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 10:43:07,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 10:43:07,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 10:43:07,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 10:43:07,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 10:43:07,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 10:43:07,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 10:43:07,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 10:43:07,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 10:43:07,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 10:43:07,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 10:43:07,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 10:43:07,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 10:43:07,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 10:43:07,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 10:43:07,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 10:43:07,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 10:43:07,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 10:43:07,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 10:43:07,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 10:43:07,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 10:43:07,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 10:43:07,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 10:43:07,453 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 10:43:07,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 10:43:07,783 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 10:43:07,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 10:43:07,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 10:43:07,789 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 10:43:07,790 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 10:43:07,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f1c1683/bb476f533f2b40f7ba4bdb363091fc77/FLAGe1942f64b [2020-08-18 10:43:08,604 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 10:43:08,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 10:43:08,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f1c1683/bb476f533f2b40f7ba4bdb363091fc77/FLAGe1942f64b [2020-08-18 10:43:08,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f1c1683/bb476f533f2b40f7ba4bdb363091fc77 [2020-08-18 10:43:08,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 10:43:08,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 10:43:08,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 10:43:08,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 10:43:08,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 10:43:08,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:08" (1/1) ... [2020-08-18 10:43:08,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62bc0006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:08, skipping insertion in model container [2020-08-18 10:43:08,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:08" (1/1) ... [2020-08-18 10:43:08,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 10:43:08,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 10:43:11,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:43:11,448 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 10:43:13,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:43:13,358 INFO L208 MainTranslator]: Completed translation [2020-08-18 10:43:13,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:13 WrapperNode [2020-08-18 10:43:13,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 10:43:13,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 10:43:13,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 10:43:13,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 10:43:13,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:13" (1/1) ... [2020-08-18 10:43:13,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:13" (1/1) ... [2020-08-18 10:43:13,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:13" (1/1) ... [2020-08-18 10:43:13,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:13" (1/1) ... [2020-08-18 10:43:13,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:13" (1/1) ... [2020-08-18 10:43:13,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:13" (1/1) ... [2020-08-18 10:43:13,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:13" (1/1) ... [2020-08-18 10:43:13,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 10:43:13,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 10:43:13,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 10:43:13,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 10:43:13,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:13" (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 10:43:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 10:43:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 10:43:13,846 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 10:43:13,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 10:43:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 10:43:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 10:43:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 10:43:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 10:43:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 10:43:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 10:43:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 10:43:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 10:43:13,848 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 10:43:13,848 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 10:43:13,848 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 10:43:13,848 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 10:43:13,848 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-18 10:43:13,848 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 10:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 10:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 10:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 10:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 10:43:20,960 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 10:43:20,960 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 10:43:20,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:20 BoogieIcfgContainer [2020-08-18 10:43:20,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 10:43:20,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 10:43:20,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 10:43:20,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 10:43:20,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:43:08" (1/3) ... [2020-08-18 10:43:20,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201b11f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:20, skipping insertion in model container [2020-08-18 10:43:20,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:13" (2/3) ... [2020-08-18 10:43:20,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201b11f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:20, skipping insertion in model container [2020-08-18 10:43:20,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:20" (3/3) ... [2020-08-18 10:43:20,988 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 10:43:20,998 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 10:43:21,016 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-18 10:43:21,031 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-18 10:43:21,070 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 10:43:21,070 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 10:43:21,070 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 10:43:21,070 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 10:43:21,070 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 10:43:21,071 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 10:43:21,071 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 10:43:21,071 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 10:43:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-08-18 10:43:21,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-08-18 10:43:21,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:43:21,185 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] [2020-08-18 10:43:21,186 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:43:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:43:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-08-18 10:43:21,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:43:21,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908576816] [2020-08-18 10:43:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:43:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:23,172 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 409 [2020-08-18 10:43:23,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:43:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:23,472 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 10:43:23,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908576816] [2020-08-18 10:43:23,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:43:23,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 10:43:23,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087441818] [2020-08-18 10:43:23,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 10:43:23,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:43:23,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 10:43:23,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 10:43:23,506 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 5 states. [2020-08-18 10:43:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:43:41,412 INFO L93 Difference]: Finished difference Result 4483 states and 7776 transitions. [2020-08-18 10:43:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 10:43:41,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-08-18 10:43:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:43:41,472 INFO L225 Difference]: With dead ends: 4483 [2020-08-18 10:43:41,473 INFO L226 Difference]: Without dead ends: 2511 [2020-08-18 10:43:41,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 10:43:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-08-18 10:43:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-08-18 10:43:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-08-18 10:43:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4317 transitions. [2020-08-18 10:43:41,721 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4317 transitions. Word has length 322 [2020-08-18 10:43:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:43:41,725 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4317 transitions. [2020-08-18 10:43:41,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 10:43:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4317 transitions. [2020-08-18 10:43:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-08-18 10:43:41,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:43:41,748 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] [2020-08-18 10:43:41,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 10:43:41,750 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:43:41,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:43:41,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1448784548, now seen corresponding path program 1 times [2020-08-18 10:43:41,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:43:41,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576649733] [2020-08-18 10:43:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:43:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:43,496 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 409 [2020-08-18 10:43:43,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:43:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:43,745 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 10:43:43,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576649733] [2020-08-18 10:43:43,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:43:43,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 10:43:43,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69455517] [2020-08-18 10:43:43,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 10:43:43,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:43:43,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 10:43:43,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:43:43,752 INFO L87 Difference]: Start difference. First operand 2511 states and 4317 transitions. Second operand 4 states. [2020-08-18 10:43:44,607 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 411