/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=0.6 --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_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:46:09,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 00:46:09,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 00:46:09,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 00:46:09,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 00:46:09,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 00:46:09,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 00:46:09,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 00:46:09,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 00:46:09,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 00:46:09,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 00:46:09,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 00:46:09,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:46:09,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:46:09,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:46:09,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:46:09,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:46:09,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:46:09,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:46:09,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:46:09,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:46:09,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:46:09,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:46:09,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:46:09,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 00:46:09,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 00:46:09,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 00:46:09,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 00:46:09,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 00:46:09,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 00:46:09,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:46:09,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:46:09,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:46:09,450 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 00:46:09,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:46:09,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:46:09,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:46:09,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:46:09,505 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:46:09,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:46:09,505 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:46:09,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:46:09,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:46:09,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:46:09,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:46:09,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:46:09,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:46:09,507 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:46:09,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:46:09,507 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:46:09,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:46:09,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:46:09,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:46:09,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:46:09,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:46:09,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:46:09,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:46:09,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:46:09,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:46:09,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:46:09,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:46:09,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:46:09,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:46:09,512 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=0.6;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=0.6;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=0.6;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=0.6;log-additional-information=true; [2020-08-22 00:46:09,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:46:09,819 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:46:09,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:46:09,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:46:09,825 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:46:09,825 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 00:46:09,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b81adcc2/f79e8d4641204307986362a75b73072f/FLAG57e70df11 [2020-08-22 00:46:10,511 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:46:10,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 00:46:10,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b81adcc2/f79e8d4641204307986362a75b73072f/FLAG57e70df11 [2020-08-22 00:46:10,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b81adcc2/f79e8d4641204307986362a75b73072f [2020-08-22 00:46:10,681 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:46:10,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:46:10,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:46:10,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:46:10,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:46:10,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:46:10" (1/1) ... [2020-08-22 00:46:10,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e8d9746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:10, skipping insertion in model container [2020-08-22 00:46:10,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:46:10" (1/1) ... [2020-08-22 00:46:10,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:46:10,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:46:12,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:46:12,230 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:46:13,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:46:13,725 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:46:13,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:13 WrapperNode [2020-08-22 00:46:13,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:46:13,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:46:13,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:46:13,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:46:13,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:13" (1/1) ... [2020-08-22 00:46:13,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:13" (1/1) ... [2020-08-22 00:46:13,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:13" (1/1) ... [2020-08-22 00:46:13,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:13" (1/1) ... [2020-08-22 00:46:13,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:13" (1/1) ... [2020-08-22 00:46:13,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:13" (1/1) ... [2020-08-22 00:46:13,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:13" (1/1) ... [2020-08-22 00:46:13,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:46:13,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:46:13,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:46:13,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:46:13,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:46:13,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:46:13,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:46:13,997 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 00:46:13,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:46:13,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:46:13,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 00:46:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 00:46:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 00:46:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 00:46:14,000 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 00:46:14,000 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 00:46:14,001 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 00:46:14,001 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 00:46:14,001 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 00:46:14,001 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 00:46:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 00:46:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 00:46:14,003 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-22 00:46:14,003 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 00:46:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 00:46:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:46:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:46:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:46:17,897 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:46:17,898 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 00:46:17,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:46:17 BoogieIcfgContainer [2020-08-22 00:46:17,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:46:17,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:46:17,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:46:17,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:46:17,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:46:10" (1/3) ... [2020-08-22 00:46:17,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435e058d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:46:17, skipping insertion in model container [2020-08-22 00:46:17,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:13" (2/3) ... [2020-08-22 00:46:17,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435e058d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:46:17, skipping insertion in model container [2020-08-22 00:46:17,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:46:17" (3/3) ... [2020-08-22 00:46:17,924 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 00:46:17,934 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:46:17,948 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:46:17,961 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:46:17,990 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:46:17,990 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:46:17,990 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:46:17,990 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:46:17,990 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:46:17,990 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:46:17,991 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:46:17,991 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:46:18,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-08-22 00:46:18,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 00:46:18,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:46:18,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:46:18,084 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:46:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:46:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-08-22 00:46:18,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:46:18,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874354366] [2020-08-22 00:46:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:46:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:20,511 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-08-22 00:46:20,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:46:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:20,782 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 00:46:20,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874354366] [2020-08-22 00:46:20,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:46:20,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:46:20,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064390931] [2020-08-22 00:46:20,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:46:20,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:46:20,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:46:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:46:20,804 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2020-08-22 00:46:21,599 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-08-22 00:46:31,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:46:31,304 INFO L93 Difference]: Finished difference Result 2262 states and 4032 transitions. [2020-08-22 00:46:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:46:31,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-08-22 00:46:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:46:31,345 INFO L225 Difference]: With dead ends: 2262 [2020-08-22 00:46:31,345 INFO L226 Difference]: Without dead ends: 1993 [2020-08-22 00:46:31,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:46:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-08-22 00:46:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2020-08-22 00:46:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2020-08-22 00:46:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions. [2020-08-22 00:46:31,522 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476 [2020-08-22 00:46:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:46:31,523 INFO L479 AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions. [2020-08-22 00:46:31,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:46:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions. [2020-08-22 00:46:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 00:46:31,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:46:31,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:46:31,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:46:31,539 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:46:31,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:46:31,540 INFO L82 PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times [2020-08-22 00:46:31,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:46:31,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601806811] [2020-08-22 00:46:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:46:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:33,731 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-08-22 00:46:33,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:46:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:34,561 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 00:46:34,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601806811] [2020-08-22 00:46:34,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:46:34,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 00:46:34,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260674788] [2020-08-22 00:46:34,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:46:34,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:46:34,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:46:34,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:46:34,569 INFO L87 Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 5 states. [2020-08-22 00:46:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:46:48,880 INFO L93 Difference]: Finished difference Result 5904 states and 9579 transitions. [2020-08-22 00:46:48,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:46:48,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-08-22 00:46:48,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:46:48,904 INFO L225 Difference]: With dead ends: 5904 [2020-08-22 00:46:48,904 INFO L226 Difference]: Without dead ends: 3930 [2020-08-22 00:46:48,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:46:48,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2020-08-22 00:46:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2020-08-22 00:46:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-08-22 00:46:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions. [2020-08-22 00:46:49,074 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 476 [2020-08-22 00:46:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:46:49,075 INFO L479 AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions. [2020-08-22 00:46:49,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:46:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions. [2020-08-22 00:46:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-08-22 00:46:49,091 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:46:49,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:46:49,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:46:49,093 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:46:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:46:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times [2020-08-22 00:46:49,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:46:49,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495868759] [2020-08-22 00:46:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:46:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:50,262 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-08-22 00:46:50,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:46:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:50,585 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 00:46:50,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495868759] [2020-08-22 00:46:50,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:46:50,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:46:50,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779715502] [2020-08-22 00:46:50,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:46:50,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:46:50,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:46:50,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:46:50,591 INFO L87 Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 4 states. [2020-08-22 00:47:05,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:47:05,951 INFO L93 Difference]: Finished difference Result 11482 states and 18513 transitions. [2020-08-22 00:47:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 00:47:05,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-08-22 00:47:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:47:05,988 INFO L225 Difference]: With dead ends: 11482 [2020-08-22 00:47:05,988 INFO L226 Difference]: Without dead ends: 7768 [2020-08-22 00:47:05,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:47:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2020-08-22 00:47:06,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7766. [2020-08-22 00:47:06,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7766 states. [2020-08-22 00:47:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 12509 transitions. [2020-08-22 00:47:06,279 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 12509 transitions. Word has length 478 [2020-08-22 00:47:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:47:06,280 INFO L479 AbstractCegarLoop]: Abstraction has 7766 states and 12509 transitions. [2020-08-22 00:47:06,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:47:06,280 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 12509 transitions. [2020-08-22 00:47:06,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-08-22 00:47:06,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:47:06,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:47:06,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:47:06,304 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:47:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:47:06,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2101540850, now seen corresponding path program 1 times [2020-08-22 00:47:06,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:47:06,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617490337] [2020-08-22 00:47:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:47:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:07,154 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-08-22 00:47:07,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:47:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:07,383 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 00:47:07,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617490337] [2020-08-22 00:47:07,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:47:07,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:47:07,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163530434] [2020-08-22 00:47:07,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:47:07,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:47:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:47:07,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:47:07,392 INFO L87 Difference]: Start difference. First operand 7766 states and 12509 transitions. Second operand 4 states.