/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=DEEPEST -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 21:17:37,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:17:37,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:17:37,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:17:37,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:17:37,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:17:37,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:17:37,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:17:37,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:17:37,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:17:37,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:17:37,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:17:37,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:17:37,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:17:37,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:17:37,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:17:37,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:17:37,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:17:37,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:17:37,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:17:37,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:17:37,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:17:37,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:17:37,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:17:37,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:17:37,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:17:37,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:17:37,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:17:37,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:17:37,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:17:37,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:17:37,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:17:37,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:17:37,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:17:37,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:17:37,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:17:37,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:17:37,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:17:37,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:17:37,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:17:37,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:17:37,878 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 21:17:37,921 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:17:37,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:17:37,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:17:37,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:17:37,923 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:17:37,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:17:37,924 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:17:37,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:17:37,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:17:37,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:17:37,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:17:37,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:17:37,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:17:37,927 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:17:37,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:17:37,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:17:37,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:17:37,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:17:37,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:17:37,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:17:37,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:17:37,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:17:37,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:17:37,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:17:37,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:17:37,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:17:37,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:17:37,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:17:37,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:17:37,931 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=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:17:38,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:17:38,294 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:17:38,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:17:38,301 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:17:38,302 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:17:38,303 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 21:17:38,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/073be18fa/dec8c15703f7445fb3b357c43650e39a/FLAG602e144a3 [2020-08-18 21:17:39,038 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:17:39,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 21:17:39,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/073be18fa/dec8c15703f7445fb3b357c43650e39a/FLAG602e144a3 [2020-08-18 21:17:39,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/073be18fa/dec8c15703f7445fb3b357c43650e39a [2020-08-18 21:17:39,146 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:17:39,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:17:39,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:17:39,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:17:39,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:17:39,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:17:39" (1/1) ... [2020-08-18 21:17:39,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b0f145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:17:39, skipping insertion in model container [2020-08-18 21:17:39,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:17:39" (1/1) ... [2020-08-18 21:17:39,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:17:39,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:17:41,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:17:41,951 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:17:43,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:17:43,853 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:17:43,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:17:43 WrapperNode [2020-08-18 21:17:43,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:17:43,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:17:43,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:17:43,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:17:43,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:17:43" (1/1) ... [2020-08-18 21:17:43,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:17:43" (1/1) ... [2020-08-18 21:17:43,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:17:43" (1/1) ... [2020-08-18 21:17:43,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:17:43" (1/1) ... [2020-08-18 21:17:44,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:17:43" (1/1) ... [2020-08-18 21:17:44,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:17:43" (1/1) ... [2020-08-18 21:17:44,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:17:43" (1/1) ... [2020-08-18 21:17:44,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:17:44,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:17:44,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:17:44,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:17:44,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:17:43" (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 21:17:44,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:17:44,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:17:44,324 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 21:17:44,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:17:44,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:17:44,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 21:17:44,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 21:17:44,327 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 21:17:44,327 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 21:17:44,328 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 21:17:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 21:17:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 21:17:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 21:17:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 21:17:44,331 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 21:17:44,332 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 21:17:44,332 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-18 21:17:44,422 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 21:17:44,422 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 21:17:44,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:17:44,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:17:44,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:17:51,186 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:17:51,186 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 21:17:51,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:17:51 BoogieIcfgContainer [2020-08-18 21:17:51,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:17:51,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:17:51,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:17:51,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:17:51,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:17:39" (1/3) ... [2020-08-18 21:17:51,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b44cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:17:51, skipping insertion in model container [2020-08-18 21:17:51,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:17:43" (2/3) ... [2020-08-18 21:17:51,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b44cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:17:51, skipping insertion in model container [2020-08-18 21:17:51,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:17:51" (3/3) ... [2020-08-18 21:17:51,210 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 21:17:51,220 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:17:51,230 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-18 21:17:51,245 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-18 21:17:51,279 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:17:51,279 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:17:51,279 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:17:51,279 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:17:51,280 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:17:51,280 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:17:51,280 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:17:51,280 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:17:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-08-18 21:17:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-08-18 21:17:51,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:17:51,375 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 21:17:51,375 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:17:51,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:17:51,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-08-18 21:17:51,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:17:51,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42207254] [2020-08-18 21:17:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:17:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:17:53,525 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification that was a NOOP. DAG size: 409 [2020-08-18 21:17:53,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:17:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:17:53,724 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 21:17:53,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42207254] [2020-08-18 21:17:53,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:17:53,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:17:53,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869535887] [2020-08-18 21:17:53,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:17:53,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:17:53,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:17:53,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:17:53,752 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 5 states. [2020-08-18 21:18:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:18:12,149 INFO L93 Difference]: Finished difference Result 4483 states and 7776 transitions. [2020-08-18 21:18:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:18:12,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-08-18 21:18:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:18:12,201 INFO L225 Difference]: With dead ends: 4483 [2020-08-18 21:18:12,202 INFO L226 Difference]: Without dead ends: 2511 [2020-08-18 21:18:12,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:18:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-08-18 21:18:12,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-08-18 21:18:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-08-18 21:18:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4317 transitions. [2020-08-18 21:18:12,440 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4317 transitions. Word has length 322 [2020-08-18 21:18:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:18:12,445 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4317 transitions. [2020-08-18 21:18:12,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:18:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4317 transitions. [2020-08-18 21:18:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-08-18 21:18:12,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:18:12,473 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 21:18:12,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:18:12,474 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:18:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:18:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1448784548, now seen corresponding path program 1 times [2020-08-18 21:18:12,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:18:12,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213008992] [2020-08-18 21:18:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:18:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:18:14,375 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 409 [2020-08-18 21:18:14,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:18:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:18:14,633 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 21:18:14,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213008992] [2020-08-18 21:18:14,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:18:14,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:18:14,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139317735] [2020-08-18 21:18:14,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:18:14,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:18:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:18:14,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:18:14,645 INFO L87 Difference]: Start difference. First operand 2511 states and 4317 transitions. Second operand 4 states. [2020-08-18 21:18:16,139 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 411