/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:03:29,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:03:29,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:03:29,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:03:29,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:03:29,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:03:29,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:03:29,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:03:29,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:03:29,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:03:29,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:03:29,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:03:29,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:03:29,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:03:29,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:03:29,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:03:29,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:03:29,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:03:29,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:03:29,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:03:29,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:03:29,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:03:29,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:03:29,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:03:29,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:03:29,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:03:29,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:03:29,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:03:29,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:03:29,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:03:29,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:03:29,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:03:29,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:03:29,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:03:29,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:03:29,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:03:29,118 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 18:03:29,140 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:03:29,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:03:29,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:03:29,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:03:29,142 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:03:29,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:03:29,142 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:03:29,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:03:29,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:03:29,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:03:29,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:03:29,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:03:29,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:03:29,144 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:03:29,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:03:29,144 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:03:29,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:03:29,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:03:29,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:03:29,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:03:29,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:03:29,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:03:29,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:03:29,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:03:29,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:03:29,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:03:29,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:03:29,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:03:29,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:03:29,147 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 18:03:29,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:03:29,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:03:29,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:03:29,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:03:29,468 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:03:29,469 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 18:03:29,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d55f271b/0ababc7997ea48918d2de4e6674ef6b9/FLAG913027a09 [2020-08-18 18:03:30,302 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:03:30,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 18:03:30,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d55f271b/0ababc7997ea48918d2de4e6674ef6b9/FLAG913027a09 [2020-08-18 18:03:30,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d55f271b/0ababc7997ea48918d2de4e6674ef6b9 [2020-08-18 18:03:30,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:03:30,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:03:30,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:03:30,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:03:30,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:03:30,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:03:30" (1/1) ... [2020-08-18 18:03:30,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cd0480f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:30, skipping insertion in model container [2020-08-18 18:03:30,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:03:30" (1/1) ... [2020-08-18 18:03:30,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:03:30,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:03:33,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:03:33,107 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:03:34,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:03:34,762 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:03:34,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:34 WrapperNode [2020-08-18 18:03:34,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:03:34,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:03:34,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:03:34,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:03:34,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:34" (1/1) ... [2020-08-18 18:03:34,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:34" (1/1) ... [2020-08-18 18:03:34,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:34" (1/1) ... [2020-08-18 18:03:34,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:34" (1/1) ... [2020-08-18 18:03:34,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:34" (1/1) ... [2020-08-18 18:03:35,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:34" (1/1) ... [2020-08-18 18:03:35,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:34" (1/1) ... [2020-08-18 18:03:35,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:03:35,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:03:35,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:03:35,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:03:35,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:34" (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 18:03:35,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:03:35,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:03:35,221 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 18:03:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:03:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:03:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 18:03:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 18:03:35,225 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 18:03:35,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 18:03:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 18:03:35,227 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 18:03:35,227 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 18:03:35,228 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 18:03:35,228 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 18:03:35,228 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 18:03:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 18:03:35,230 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-18 18:03:35,230 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 18:03:35,230 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 18:03:35,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:03:35,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:03:35,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:03:41,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:03:41,892 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 18:03:41,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:03:41 BoogieIcfgContainer [2020-08-18 18:03:41,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:03:41,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:03:41,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:03:41,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:03:41,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:03:30" (1/3) ... [2020-08-18 18:03:41,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2f952a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:03:41, skipping insertion in model container [2020-08-18 18:03:41,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:34" (2/3) ... [2020-08-18 18:03:41,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2f952a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:03:41, skipping insertion in model container [2020-08-18 18:03:41,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:03:41" (3/3) ... [2020-08-18 18:03:41,915 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 18:03:41,928 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:03:41,938 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-18 18:03:41,953 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-18 18:03:41,984 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:03:41,985 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:03:41,985 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:03:41,985 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:03:41,985 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:03:41,985 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:03:41,986 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:03:41,986 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:03:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-08-18 18:03:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-08-18 18:03:42,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:03:42,080 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] [2020-08-18 18:03:42,081 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:03:42,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:03:42,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-08-18 18:03:42,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:03:42,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453299346] [2020-08-18 18:03:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:03:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:44,021 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-08-18 18:03:44,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:44,220 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 18:03:44,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453299346] [2020-08-18 18:03:44,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:03:44,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:03:44,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118902292] [2020-08-18 18:03:44,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:03:44,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:03:44,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:03:44,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:03:44,252 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 5 states. [2020-08-18 18:04:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:04:00,127 INFO L93 Difference]: Finished difference Result 3956 states and 6884 transitions. [2020-08-18 18:04:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:04:00,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 290 [2020-08-18 18:04:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:04:00,169 INFO L225 Difference]: With dead ends: 3956 [2020-08-18 18:04:00,169 INFO L226 Difference]: Without dead ends: 2245 [2020-08-18 18:04:00,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:04:00,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-08-18 18:04:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-08-18 18:04:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-08-18 18:04:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3871 transitions. [2020-08-18 18:04:00,331 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3871 transitions. Word has length 290 [2020-08-18 18:04:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:04:00,332 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3871 transitions. [2020-08-18 18:04:00,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:04:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3871 transitions. [2020-08-18 18:04:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-08-18 18:04:00,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:04:00,341 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] [2020-08-18 18:04:00,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:04:00,342 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:04:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:04:00,343 INFO L82 PathProgramCache]: Analyzing trace with hash -875879150, now seen corresponding path program 1 times [2020-08-18 18:04:00,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:04:00,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373584955] [2020-08-18 18:04:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:04:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:04:01,506 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-08-18 18:04:01,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:04:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:04:01,710 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 18:04:01,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373584955] [2020-08-18 18:04:01,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:04:01,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:04:01,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632388752] [2020-08-18 18:04:01,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:04:01,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:04:01,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:04:01,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:04:01,716 INFO L87 Difference]: Start difference. First operand 2245 states and 3871 transitions. Second operand 4 states. [2020-08-18 18:04:02,480 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2020-08-18 18:04:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:04:26,201 INFO L93 Difference]: Finished difference Result 5464 states and 9356 transitions. [2020-08-18 18:04:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:04:26,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2020-08-18 18:04:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:04:26,224 INFO L225 Difference]: With dead ends: 5464 [2020-08-18 18:04:26,224 INFO L226 Difference]: Without dead ends: 3801 [2020-08-18 18:04:26,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:04:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-08-18 18:04:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3797. [2020-08-18 18:04:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3797 states. [2020-08-18 18:04:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6464 transitions. [2020-08-18 18:04:26,332 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6464 transitions. Word has length 349 [2020-08-18 18:04:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:04:26,333 INFO L479 AbstractCegarLoop]: Abstraction has 3797 states and 6464 transitions. [2020-08-18 18:04:26,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:04:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6464 transitions. [2020-08-18 18:04:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-08-18 18:04:26,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:04:26,346 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] [2020-08-18 18:04:26,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:04:26,347 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:04:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:04:26,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1287553668, now seen corresponding path program 1 times [2020-08-18 18:04:26,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:04:26,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205857867] [2020-08-18 18:04:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:04:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:04:27,380 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-08-18 18:04:27,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:04:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:04:27,528 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 18:04:27,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205857867] [2020-08-18 18:04:27,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:04:27,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:04:27,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227134220] [2020-08-18 18:04:27,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:04:27,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:04:27,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:04:27,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:04:27,531 INFO L87 Difference]: Start difference. First operand 3797 states and 6464 transitions. Second operand 4 states. [2020-08-18 18:04:28,358 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 398