/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:37:02,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:37:02,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:37:02,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:37:02,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:37:02,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:37:02,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:37:02,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:37:02,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:37:02,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:37:02,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:37:02,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:37:02,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:37:02,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:37:02,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:37:02,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:37:02,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:37:02,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:37:02,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:37:02,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:37:02,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:37:02,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:37:02,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:37:02,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:37:02,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:37:02,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:37:02,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:37:02,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:37:02,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:37:02,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:37:02,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:37:02,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:37:02,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:37:02,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:37:02,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:37:02,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:37:02,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:37:02,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:37:02,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:37:02,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:37:02,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:37:02,977 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 [2020-09-21 12:37:03,015 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:37:03,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:37:03,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:37:03,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:37:03,018 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:37:03,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:37:03,019 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:37:03,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:37:03,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:37:03,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:37:03,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:37:03,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:37:03,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:37:03,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:37:03,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:37:03,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:37:03,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:37:03,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:37:03,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:37:03,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:37:03,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:37:03,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:37:03,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:37:03,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:37:03,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:37:03,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:37:03,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:37:03,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:37:03,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:37:03,025 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:37:03,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:37:03,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:37:03,475 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:37:03,477 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:37:03,478 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:37:03,479 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-09-21 12:37:03,562 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc0b64a0d/103d9c4a92b24de5b45e82b46d53ead7/FLAGa68b5096b [2020-09-21 12:37:04,108 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:37:04,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-09-21 12:37:04,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc0b64a0d/103d9c4a92b24de5b45e82b46d53ead7/FLAGa68b5096b [2020-09-21 12:37:04,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc0b64a0d/103d9c4a92b24de5b45e82b46d53ead7 [2020-09-21 12:37:04,485 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:37:04,494 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:37:04,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:37:04,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:37:04,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:37:04,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238a6ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04, skipping insertion in model container [2020-09-21 12:37:04,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:37:04,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:37:04,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:37:04,801 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:37:04,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:37:04,843 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:37:04,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04 WrapperNode [2020-09-21 12:37:04,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:37:04,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:37:04,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:37:04,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:37:04,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:37:04,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:37:04,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:37:04,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:37:04,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (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 [2020-09-21 12:37:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:37:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:37:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:37:05,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:37:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:37:05,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:37:05,041 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:37:05,041 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:37:05,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:37:05,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:37:05,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:37:05,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:37:05,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:37:05,359 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:37:05,360 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:37:05,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:37:05 BoogieIcfgContainer [2020-09-21 12:37:05,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:37:05,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:37:05,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:37:05,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:37:05,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:37:04" (1/3) ... [2020-09-21 12:37:05,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c42039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:37:05, skipping insertion in model container [2020-09-21 12:37:05,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (2/3) ... [2020-09-21 12:37:05,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c42039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:37:05, skipping insertion in model container [2020-09-21 12:37:05,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:37:05" (3/3) ... [2020-09-21 12:37:05,376 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt8.c [2020-09-21 12:37:05,389 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:37:05,401 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:37:05,431 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:37:05,463 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:37:05,463 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:37:05,464 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:37:05,464 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:37:05,464 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:37:05,464 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:37:05,464 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:37:05,465 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:37:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-09-21 12:37:05,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 12:37:05,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:05,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:05,500 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1078562183, now seen corresponding path program 1 times [2020-09-21 12:37:05,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:05,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088714856] [2020-09-21 12:37:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:05,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:06,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:06,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:37:06,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:06,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-09-21 12:37:06,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:06,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:37:06,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:06,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:37:06,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-21 12:37:06,624 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2020-09-21 12:37:06,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:06,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:06,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:06,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:06,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:06,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:37:06,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:06,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:06,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:06,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:06,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:06,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088714856] [2020-09-21 12:37:06,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:37:06,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 12:37:06,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946628684] [2020-09-21 12:37:06,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:37:06,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:06,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:37:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:37:06,735 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 8 states. [2020-09-21 12:37:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:09,419 INFO L93 Difference]: Finished difference Result 71 states and 105 transitions. [2020-09-21 12:37:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:37:09,421 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-09-21 12:37:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:09,435 INFO L225 Difference]: With dead ends: 71 [2020-09-21 12:37:09,435 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 12:37:09,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:37:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 12:37:09,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-21 12:37:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 12:37:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-09-21 12:37:09,494 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 14 [2020-09-21 12:37:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:09,495 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-09-21 12:37:09,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:37:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-09-21 12:37:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:37:09,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:09,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:09,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:37:09,497 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:09,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:09,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1550149586, now seen corresponding path program 1 times [2020-09-21 12:37:09,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:09,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452822390] [2020-09-21 12:37:09,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:09,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:09,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:09,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:10,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:10,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:37:10,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:37:10,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:37:10,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:10,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:10,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:37:10,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:37:10,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:37:12,569 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2020-09-21 12:37:12,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:12,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:12,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:12,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:12,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:12,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:37:12,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:12,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:12,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:12,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:12,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:12,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:12,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:12,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:12,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:12,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:12,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 12:37:12,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:12,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:12,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:12,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:12,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:12,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452822390] [2020-09-21 12:37:12,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:37:12,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:37:12,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733648414] [2020-09-21 12:37:12,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:12,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:12,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:12,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:12,698 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 5 states. [2020-09-21 12:37:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:21,169 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-09-21 12:37:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:37:21,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-09-21 12:37:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:21,175 INFO L225 Difference]: With dead ends: 64 [2020-09-21 12:37:21,175 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 12:37:21,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 12:37:21,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-09-21 12:37:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 12:37:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-09-21 12:37:21,192 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 22 [2020-09-21 12:37:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:21,192 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-09-21 12:37:21,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:21,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-09-21 12:37:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:37:21,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:21,194 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:21,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:37:21,194 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:21,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1734885426, now seen corresponding path program 1 times [2020-09-21 12:37:21,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:21,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629796202] [2020-09-21 12:37:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:21,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:21,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:21,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:22,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:22,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:37:22,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:37:22,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:37:22,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:22,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:22,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:37:22,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:22,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:22,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:22,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:22,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:22,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:22,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:37:22,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:22,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:22,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:22,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:22,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:22,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:22,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:22,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 12:37:22,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:22,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:22,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:22,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:22,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:22,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629796202] [2020-09-21 12:37:22,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:22,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:37:22,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031125069] [2020-09-21 12:37:22,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:22,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:22,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:22,426 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 5 states. [2020-09-21 12:37:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:22,713 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2020-09-21 12:37:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:22,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-21 12:37:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:22,716 INFO L225 Difference]: With dead ends: 64 [2020-09-21 12:37:22,716 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 12:37:22,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 12:37:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-09-21 12:37:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 12:37:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-09-21 12:37:22,740 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 23 [2020-09-21 12:37:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:22,740 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-09-21 12:37:22,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-09-21 12:37:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:37:22,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:22,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:22,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:37:22,742 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:22,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:22,742 INFO L82 PathProgramCache]: Analyzing trace with hash -985092371, now seen corresponding path program 1 times [2020-09-21 12:37:22,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:22,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152047854] [2020-09-21 12:37:22,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:22,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:22,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:24,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:24,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:37:24,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:37:24,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-09-21 12:37:24,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:24,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:24,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:24,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:37:24,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:24,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:24,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:24,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:24,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:24,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:24,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:37:24,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:24,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:24,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:24,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:24,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:24,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:24,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:24,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:24,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:24,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:24,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:37:24,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:24,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:24,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:24,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:24,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:24,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152047854] [2020-09-21 12:37:24,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:24,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:37:24,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414790392] [2020-09-21 12:37:24,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:24,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:24,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:24,273 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2020-09-21 12:37:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:28,645 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-09-21 12:37:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:28,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-21 12:37:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:28,649 INFO L225 Difference]: With dead ends: 60 [2020-09-21 12:37:28,649 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 12:37:28,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 12:37:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-09-21 12:37:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 12:37:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-09-21 12:37:28,660 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 24 [2020-09-21 12:37:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:28,664 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-09-21 12:37:28,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-09-21 12:37:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:37:28,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:28,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:28,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:37:28,667 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:28,667 INFO L82 PathProgramCache]: Analyzing trace with hash 738087597, now seen corresponding path program 1 times [2020-09-21 12:37:28,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:28,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854656837] [2020-09-21 12:37:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:28,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:42,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:42,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:37:42,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:42,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13688 [2020-09-21 12:37:42,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 12:37:42,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:42,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:42,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:42,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:42,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:42,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:42,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:37:42,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:42,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:42,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:42,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:42,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:42,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:42,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:42,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:42,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:42,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:42,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 12:37:42,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:42,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:42,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:42,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:42,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:42,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854656837] [2020-09-21 12:37:42,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:42,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:37:42,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432162529] [2020-09-21 12:37:42,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:42,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:42,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:42,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:42,636 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2020-09-21 12:37:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:42,861 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-09-21 12:37:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:42,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-21 12:37:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:42,863 INFO L225 Difference]: With dead ends: 64 [2020-09-21 12:37:42,863 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 12:37:42,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 12:37:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-09-21 12:37:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 12:37:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-09-21 12:37:42,873 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 25 [2020-09-21 12:37:42,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:42,874 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-09-21 12:37:42,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:42,874 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-09-21 12:37:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:37:42,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:42,875 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:42,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:37:42,876 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:42,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:42,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1534762488, now seen corresponding path program 1 times [2020-09-21 12:37:42,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:42,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611783799] [2020-09-21 12:37:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:42,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:42,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:11,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:11,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:38:11,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:38:11,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28399 [2020-09-21 12:38:11,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:11,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:38:11,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:38:11,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:38:11,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:11,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:11,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:11,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:11,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:11,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:11,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:38:11,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:11,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:11,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:38:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:11,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:11,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:11,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:38:11,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:11,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 12:38:11,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:11,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:38:11,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:11,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:38:11,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:38:11,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611783799] [2020-09-21 12:38:11,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:38:11,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:38:11,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518232902] [2020-09-21 12:38:11,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:38:11,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:11,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:38:11,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:38:11,427 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-09-21 12:38:11,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:11,580 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-09-21 12:38:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:38:11,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-09-21 12:38:11,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:11,582 INFO L225 Difference]: With dead ends: 64 [2020-09-21 12:38:11,582 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 12:38:11,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:38:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 12:38:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-21 12:38:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 12:38:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-09-21 12:38:11,590 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 26 [2020-09-21 12:38:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:11,591 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-09-21 12:38:11,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:38:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-09-21 12:38:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:38:11,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:11,592 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:38:11,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:38:11,592 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:11,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1164474664, now seen corresponding path program 1 times [2020-09-21 12:38:11,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:11,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742820139] [2020-09-21 12:38:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:11,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking...