/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:35:44,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:35:44,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:35:44,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:35:44,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:35:44,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:35:44,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:35:44,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:35:44,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:35:44,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:35:44,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:35:44,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:35:44,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:35:44,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:35:44,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:35:44,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:35:44,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:35:44,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:35:44,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:35:44,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:35:44,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:35:44,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:35:44,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:35:44,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:35:44,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:35:44,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:35:44,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:35:44,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:35:44,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:35:44,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 01:35:44,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 01:35:44,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 01:35:44,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 01:35:44,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 01:35:44,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 01:35:44,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 01:35:44,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 01:35:44,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 01:35:44,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:35:44,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:35:44,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:35:44,214 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 [2020-08-22 01:35:44,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:35:44,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:35:44,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:35:44,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:35:44,257 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:35:44,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:35:44,257 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:35:44,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:35:44,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:35:44,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:35:44,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:35:44,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:35:44,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:35:44,260 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:35:44,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:35:44,260 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:35:44,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:35:44,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:35:44,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:35:44,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:35:44,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:35:44,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:35:44,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:35:44,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:35:44,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:35:44,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:35:44,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:35:44,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:35:44,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:35:44,263 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:35:44,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:35:44,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:35:44,601 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:35:44,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:35:44,603 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:35:44,604 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 01:35:44,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21fbf6f5f/a4aa5904f3eb4e619f4494a5d07453ee/FLAG55d437ee1 [2020-08-22 01:35:45,307 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:35:45,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 01:35:45,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21fbf6f5f/a4aa5904f3eb4e619f4494a5d07453ee/FLAG55d437ee1 [2020-08-22 01:35:45,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21fbf6f5f/a4aa5904f3eb4e619f4494a5d07453ee [2020-08-22 01:35:45,452 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:35:45,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:35:45,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:35:45,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:35:45,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:35:45,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:35:45" (1/1) ... [2020-08-22 01:35:45,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261564d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:45, skipping insertion in model container [2020-08-22 01:35:45,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:35:45" (1/1) ... [2020-08-22 01:35:45,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:35:45,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:35:46,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:35:46,702 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:35:47,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:35:47,189 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:35:47,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:47 WrapperNode [2020-08-22 01:35:47,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:35:47,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:35:47,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:35:47,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:35:47,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:47" (1/1) ... [2020-08-22 01:35:47,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:47" (1/1) ... [2020-08-22 01:35:47,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:47" (1/1) ... [2020-08-22 01:35:47,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:47" (1/1) ... [2020-08-22 01:35:47,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:47" (1/1) ... [2020-08-22 01:35:47,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:47" (1/1) ... [2020-08-22 01:35:47,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:47" (1/1) ... [2020-08-22 01:35:47,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:35:47,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:35:47,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:35:47,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:35:47,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:47" (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 [2020-08-22 01:35:47,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:35:47,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:35:47,493 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 01:35:47,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:35:47,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:35:47,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 01:35:47,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 01:35:47,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 01:35:47,495 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 01:35:47,497 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 01:35:47,497 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 01:35:47,497 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 01:35:47,497 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 01:35:47,498 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 01:35:47,498 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 01:35:47,499 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 01:35:47,499 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 01:35:47,500 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 01:35:47,500 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 01:35:47,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:35:47,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:35:47,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:35:50,184 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:35:50,185 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 01:35:50,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:35:50 BoogieIcfgContainer [2020-08-22 01:35:50,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:35:50,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:35:50,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:35:50,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:35:50,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:35:45" (1/3) ... [2020-08-22 01:35:50,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d61be0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:35:50, skipping insertion in model container [2020-08-22 01:35:50,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:47" (2/3) ... [2020-08-22 01:35:50,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d61be0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:35:50, skipping insertion in model container [2020-08-22 01:35:50,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:35:50" (3/3) ... [2020-08-22 01:35:50,206 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 01:35:50,216 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:35:50,233 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:35:50,247 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:35:50,279 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:35:50,279 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:35:50,279 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:35:50,279 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:35:50,279 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:35:50,280 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:35:50,280 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:35:50,280 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:35:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-08-22 01:35:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 01:35:50,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:35:50,358 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] [2020-08-22 01:35:50,358 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:35:50,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:35:50,363 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-08-22 01:35:50,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:35:50,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714879212] [2020-08-22 01:35:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:35:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:35:52,099 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:35:52,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:35:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:35:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:35:52,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714879212] [2020-08-22 01:35:52,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:35:52,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:35:52,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655038899] [2020-08-22 01:35:52,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:35:52,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:35:52,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:35:52,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:35:52,335 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-08-22 01:35:52,836 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 01:35:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:35:57,800 INFO L93 Difference]: Finished difference Result 1515 states and 2659 transitions. [2020-08-22 01:35:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:35:57,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 01:35:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:35:57,839 INFO L225 Difference]: With dead ends: 1515 [2020-08-22 01:35:57,839 INFO L226 Difference]: Without dead ends: 1299 [2020-08-22 01:35:57,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:35:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-08-22 01:35:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2020-08-22 01:35:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1297 states. [2020-08-22 01:35:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions. [2020-08-22 01:35:57,985 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318 [2020-08-22 01:35:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:35:57,987 INFO L479 AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions. [2020-08-22 01:35:57,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:35:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions. [2020-08-22 01:35:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 01:35:57,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:35:57,996 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] [2020-08-22 01:35:57,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:35:57,997 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:35:57,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:35:57,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times [2020-08-22 01:35:57,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:35:57,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925757704] [2020-08-22 01:35:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:35:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:35:58,914 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:35:58,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:35:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:35:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:35:59,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925757704] [2020-08-22 01:35:59,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:35:59,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:35:59,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924875421] [2020-08-22 01:35:59,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:35:59,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:35:59,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:35:59,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:35:59,228 INFO L87 Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states. [2020-08-22 01:35:59,926 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 01:36:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:04,296 INFO L93 Difference]: Finished difference Result 2671 states and 4201 transitions. [2020-08-22 01:36:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:36:04,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 01:36:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:04,313 INFO L225 Difference]: With dead ends: 2671 [2020-08-22 01:36:04,313 INFO L226 Difference]: Without dead ends: 2289 [2020-08-22 01:36:04,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:36:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-08-22 01:36:04,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2020-08-22 01:36:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-08-22 01:36:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions. [2020-08-22 01:36:04,419 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318 [2020-08-22 01:36:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:04,422 INFO L479 AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions. [2020-08-22 01:36:04,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:36:04,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions. [2020-08-22 01:36:04,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 01:36:04,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:04,436 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] [2020-08-22 01:36:04,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:36:04,437 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:04,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-08-22 01:36:04,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:04,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315646395] [2020-08-22 01:36:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:05,208 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:36:05,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:05,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315646395] [2020-08-22 01:36:05,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:05,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:36:05,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398815103] [2020-08-22 01:36:05,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:36:05,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:05,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:36:05,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:05,373 INFO L87 Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states. [2020-08-22 01:36:05,819 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 01:36:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:09,903 INFO L93 Difference]: Finished difference Result 4943 states and 7762 transitions. [2020-08-22 01:36:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:36:09,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 01:36:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:09,925 INFO L225 Difference]: With dead ends: 4943 [2020-08-22 01:36:09,925 INFO L226 Difference]: Without dead ends: 4229 [2020-08-22 01:36:09,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:36:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2020-08-22 01:36:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227. [2020-08-22 01:36:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-08-22 01:36:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions. [2020-08-22 01:36:10,063 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318 [2020-08-22 01:36:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:10,064 INFO L479 AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions. [2020-08-22 01:36:10,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:36:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions. [2020-08-22 01:36:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 01:36:10,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:10,076 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] [2020-08-22 01:36:10,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:36:10,076 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:10,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-08-22 01:36:10,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:10,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147607188] [2020-08-22 01:36:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:10,890 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:36:10,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:11,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147607188] [2020-08-22 01:36:11,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:11,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:36:11,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309639259] [2020-08-22 01:36:11,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:36:11,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:36:11,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:11,110 INFO L87 Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states. [2020-08-22 01:36:11,510 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 01:36:15,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:15,359 INFO L93 Difference]: Finished difference Result 9359 states and 14670 transitions. [2020-08-22 01:36:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:36:15,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 01:36:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:15,396 INFO L225 Difference]: With dead ends: 9359 [2020-08-22 01:36:15,396 INFO L226 Difference]: Without dead ends: 8029 [2020-08-22 01:36:15,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:36:15,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2020-08-22 01:36:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027. [2020-08-22 01:36:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2020-08-22 01:36:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions. [2020-08-22 01:36:15,621 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318 [2020-08-22 01:36:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:15,622 INFO L479 AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions. [2020-08-22 01:36:15,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:36:15,622 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions. [2020-08-22 01:36:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 01:36:15,639 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:15,640 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] [2020-08-22 01:36:15,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:36:15,641 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-08-22 01:36:15,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:15,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627130150] [2020-08-22 01:36:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:16,560 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:36:16,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:16,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627130150] [2020-08-22 01:36:16,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:16,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:36:16,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415531976] [2020-08-22 01:36:16,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:36:16,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:16,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:36:16,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:36:16,702 INFO L87 Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states. [2020-08-22 01:36:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:23,599 INFO L93 Difference]: Finished difference Result 23754 states and 36777 transitions. [2020-08-22 01:36:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:36:23,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-08-22 01:36:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:23,665 INFO L225 Difference]: With dead ends: 23754 [2020-08-22 01:36:23,666 INFO L226 Difference]: Without dead ends: 15742 [2020-08-22 01:36:23,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:36:23,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2020-08-22 01:36:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740. [2020-08-22 01:36:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15740 states. [2020-08-22 01:36:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions. [2020-08-22 01:36:24,171 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318 [2020-08-22 01:36:24,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:24,172 INFO L479 AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions. [2020-08-22 01:36:24,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:36:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions. [2020-08-22 01:36:24,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-08-22 01:36:24,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:24,206 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] [2020-08-22 01:36:24,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:36:24,206 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:24,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:24,207 INFO L82 PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times [2020-08-22 01:36:24,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:24,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631700711] [2020-08-22 01:36:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:25,591 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:36:25,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:25,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631700711] [2020-08-22 01:36:25,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:25,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:36:25,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720161504] [2020-08-22 01:36:25,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:36:25,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:25,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:36:25,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:25,762 INFO L87 Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states. [2020-08-22 01:36:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:34,189 INFO L93 Difference]: Finished difference Result 46481 states and 71518 transitions. [2020-08-22 01:36:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:36:34,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-08-22 01:36:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:34,262 INFO L225 Difference]: With dead ends: 46481 [2020-08-22 01:36:34,263 INFO L226 Difference]: Without dead ends: 30870 [2020-08-22 01:36:34,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30870 states. [2020-08-22 01:36:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30870 to 30868. [2020-08-22 01:36:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30868 states. [2020-08-22 01:36:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 47285 transitions. [2020-08-22 01:36:35,303 INFO L78 Accepts]: Start accepts. Automaton has 30868 states and 47285 transitions. Word has length 320 [2020-08-22 01:36:35,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:35,303 INFO L479 AbstractCegarLoop]: Abstraction has 30868 states and 47285 transitions. [2020-08-22 01:36:35,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:36:35,303 INFO L276 IsEmpty]: Start isEmpty. Operand 30868 states and 47285 transitions. [2020-08-22 01:36:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-08-22 01:36:35,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:35,357 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] [2020-08-22 01:36:35,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:36:35,358 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:35,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:35,358 INFO L82 PathProgramCache]: Analyzing trace with hash -810813248, now seen corresponding path program 1 times [2020-08-22 01:36:35,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:35,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914571207] [2020-08-22 01:36:35,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:35,862 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:36:35,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:35,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914571207] [2020-08-22 01:36:35,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:35,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:36:35,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654663266] [2020-08-22 01:36:35,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:36:35,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:35,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:36:35,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:35,954 INFO L87 Difference]: Start difference. First operand 30868 states and 47285 transitions. Second operand 4 states.