/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --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/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:19:02,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:19:02,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:19:02,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:19:02,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:19:02,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:19:02,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:19:02,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:19:02,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:19:02,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:19:02,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:19:02,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:19:02,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:19:02,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:19:02,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:19:02,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:19:02,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:19:02,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:19:02,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:19:02,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:19:02,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:19:02,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:19:02,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:19:02,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:19:02,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:19:02,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:19:02,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:19:02,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:19:02,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:19:02,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-25 02:19:02,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:19:02,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:19:02,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:19:02,509 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 [2020-09-25 02:19:02,537 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:19:02,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:19:02,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:19:02,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:19:02,539 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:19:02,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:19:02,540 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:19:02,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:19:02,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:19:02,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:19:02,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:19:02,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:19:02,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:19:02,541 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:19:02,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:19:02,541 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:19:02,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:19:02,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:19:02,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:19:02,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:19:02,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:19:02,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:19:02,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:19:02,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:19:02,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:19:02,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:19:02,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:19:02,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:19:02,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:19:02,545 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.rcfgbuilder: Size of a code block -> SingleStatement 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=5000;interpolation-heuristic=NARROWEST;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=5000;interpolation-heuristic=NARROWEST;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=5000;interpolation-heuristic=NARROWEST;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=5000;interpolation-heuristic=NARROWEST;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=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-09-25 02:19:03,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:19:03,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:19:03,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:19:03,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:19:03,059 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:19:03,060 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 02:19:03,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbbbf6bb0/1d2453c41986475e92df6792e8329e88/FLAGee9da29ef [2020-09-25 02:19:03,760 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:19:03,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 02:19:03,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbbbf6bb0/1d2453c41986475e92df6792e8329e88/FLAGee9da29ef [2020-09-25 02:19:04,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbbbf6bb0/1d2453c41986475e92df6792e8329e88 [2020-09-25 02:19:04,100 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:19:04,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:19:04,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:04,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:19:04,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:19:04,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:04" (1/1) ... [2020-09-25 02:19:04,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703d1064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:04, skipping insertion in model container [2020-09-25 02:19:04,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:04" (1/1) ... [2020-09-25 02:19:04,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:19:04,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:19:04,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:04,396 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:19:04,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:04,431 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:19:04,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:04 WrapperNode [2020-09-25 02:19:04,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:04,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:19:04,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:19:04,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:19:04,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:04" (1/1) ... [2020-09-25 02:19:04,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:04" (1/1) ... [2020-09-25 02:19:04,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:04" (1/1) ... [2020-09-25 02:19:04,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:04" (1/1) ... [2020-09-25 02:19:04,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:04" (1/1) ... [2020-09-25 02:19:04,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:04" (1/1) ... [2020-09-25 02:19:04,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:04" (1/1) ... [2020-09-25 02:19:04,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:19:04,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:19:04,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:19:04,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:19:04,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:04" (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 [2020-09-25 02:19:04,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:19:04,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:19:04,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:19:04,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:19:04,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:19:04,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:19:04,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 02:19:04,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:19:04,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:19:04,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:19:04,875 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:19:04,876 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 02:19:04,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:04 BoogieIcfgContainer [2020-09-25 02:19:04,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:19:04,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:19:04,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:19:04,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:19:04,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:19:04" (1/3) ... [2020-09-25 02:19:04,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7e53ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:04, skipping insertion in model container [2020-09-25 02:19:04,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:04" (2/3) ... [2020-09-25 02:19:04,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7e53ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:04, skipping insertion in model container [2020-09-25 02:19:04,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:04" (3/3) ... [2020-09-25 02:19:04,917 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-09-25 02:19:04,938 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:19:04,948 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:19:04,978 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:19:05,010 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:19:05,010 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:19:05,011 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:19:05,011 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:19:05,011 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:19:05,011 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:19:05,011 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:19:05,012 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:19:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 02:19:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 02:19:05,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:05,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:05,041 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:05,049 INFO L82 PathProgramCache]: Analyzing trace with hash 79158399, now seen corresponding path program 1 times [2020-09-25 02:19:05,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:05,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911968879] [2020-09-25 02:19:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:05,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:05,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 02:19:05,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:05,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-09-25 02:19:05,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:05,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:05,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 02:19:05,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:05,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:19:05,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:05,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:05,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:05,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:05,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:19:05,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:05,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:05,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:05,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:05,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:05,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911968879] [2020-09-25 02:19:05,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:05,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 02:19:05,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666867379] [2020-09-25 02:19:05,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 02:19:05,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:05,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 02:19:05,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 02:19:05,501 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-09-25 02:19:05,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:05,527 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-25 02:19:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 02:19:05,529 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-09-25 02:19:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:05,538 INFO L225 Difference]: With dead ends: 41 [2020-09-25 02:19:05,538 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 02:19:05,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 02:19:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 02:19:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-25 02:19:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 02:19:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-25 02:19:05,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-25 02:19:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:05,587 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-25 02:19:05,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 02:19:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-25 02:19:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 02:19:05,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:05,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:05,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:19:05,589 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:05,590 INFO L82 PathProgramCache]: Analyzing trace with hash 62535021, now seen corresponding path program 1 times [2020-09-25 02:19:05,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:05,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273159929] [2020-09-25 02:19:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:05,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:05,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 02:19:05,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:05,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-25 02:19:05,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:05,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:05,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 02:19:05,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 02:19:05,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:05,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:05,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:05,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:05,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:05,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:19:05,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:05,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:05,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:05,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273159929] [2020-09-25 02:19:05,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:05,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:19:05,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96517136] [2020-09-25 02:19:05,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:19:05,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:05,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:19:05,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:19:05,844 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2020-09-25 02:19:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:05,886 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-09-25 02:19:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:19:05,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-25 02:19:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:05,889 INFO L225 Difference]: With dead ends: 38 [2020-09-25 02:19:05,889 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 02:19:05,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:19:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 02:19:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 02:19:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 02:19:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 02:19:05,898 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 15 [2020-09-25 02:19:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:05,899 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 02:19:05,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:19:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 02:19:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 02:19:05,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:05,900 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] [2020-09-25 02:19:05,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:19:05,901 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:05,902 INFO L82 PathProgramCache]: Analyzing trace with hash 268436001, now seen corresponding path program 1 times [2020-09-25 02:19:05,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:05,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268087051] [2020-09-25 02:19:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:05,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:06,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:06,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 02:19:06,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:06,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-09-25 02:19:06,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:19:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 02:19:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 02:19:06,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:06,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:06,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:06,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:06,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:06,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:06,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:19:06,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:06,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:06,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:06,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:06,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:06,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268087051] [2020-09-25 02:19:06,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:06,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 02:19:06,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004483270] [2020-09-25 02:19:06,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:19:06,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:06,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:19:06,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:19:06,520 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-09-25 02:19:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:06,779 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-25 02:19:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 02:19:06,780 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-09-25 02:19:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:06,784 INFO L225 Difference]: With dead ends: 60 [2020-09-25 02:19:06,784 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 02:19:06,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:19:06,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 02:19:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-25 02:19:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 02:19:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-09-25 02:19:06,795 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-09-25 02:19:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:06,795 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-09-25 02:19:06,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:19:06,796 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-09-25 02:19:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 02:19:06,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:06,797 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:06,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:19:06,798 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:06,798 INFO L82 PathProgramCache]: Analyzing trace with hash -635017609, now seen corresponding path program 1 times [2020-09-25 02:19:06,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:06,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234076803] [2020-09-25 02:19:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:06,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:06,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:06,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 02:19:06,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:06,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-25 02:19:06,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 02:19:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:19:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 02:19:06,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:07,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:07,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:07,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:19:07,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:07,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:07,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234076803] [2020-09-25 02:19:07,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:07,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 02:19:07,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369854986] [2020-09-25 02:19:07,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:19:07,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:07,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:19:07,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:19:07,062 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-09-25 02:19:07,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:07,195 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-09-25 02:19:07,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:19:07,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-09-25 02:19:07,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:07,197 INFO L225 Difference]: With dead ends: 60 [2020-09-25 02:19:07,197 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 02:19:07,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:19:07,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 02:19:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-25 02:19:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-25 02:19:07,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-25 02:19:07,205 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-09-25 02:19:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:07,205 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-25 02:19:07,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:19:07,206 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-25 02:19:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 02:19:07,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:07,207 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:07,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:19:07,208 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:07,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1260601325, now seen corresponding path program 2 times [2020-09-25 02:19:07,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:07,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047205448] [2020-09-25 02:19:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 02:19:07,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:07,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-09-25 02:19:07,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 02:19:07,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 02:19:07,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 02:19:07,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:07,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:07,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:07,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:19:07,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:07,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:07,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:07,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:19:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 02:19:07,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047205448] [2020-09-25 02:19:07,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:07,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 02:19:07,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810228054] [2020-09-25 02:19:07,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 02:19:07,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:07,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 02:19:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:19:07,936 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-09-25 02:19:08,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:08,373 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-09-25 02:19:08,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 02:19:08,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-25 02:19:08,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:08,374 INFO L225 Difference]: With dead ends: 54 [2020-09-25 02:19:08,375 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 02:19:08,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 02:19:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 02:19:08,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-09-25 02:19:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-25 02:19:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-25 02:19:08,381 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2020-09-25 02:19:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:08,382 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-25 02:19:08,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 02:19:08,382 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-25 02:19:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 02:19:08,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:08,384 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:08,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:19:08,385 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:08,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:08,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1220208573, now seen corresponding path program 2 times [2020-09-25 02:19:08,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:08,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370090646] [2020-09-25 02:19:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:08,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:08,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 02:19:08,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:08,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-09-25 02:19:08,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:08,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 02:19:08,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:19:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 02:19:08,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:08,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:08,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:08,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:08,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:08,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:19:08,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:08,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:08,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:08,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:08,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:08,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370090646] [2020-09-25 02:19:08,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:08,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:19:08,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729386259] [2020-09-25 02:19:08,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:19:08,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:08,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:19:08,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:19:08,737 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-09-25 02:19:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:08,933 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-09-25 02:19:08,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 02:19:08,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-09-25 02:19:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:08,935 INFO L225 Difference]: With dead ends: 70 [2020-09-25 02:19:08,935 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 02:19:08,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-25 02:19:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 02:19:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-09-25 02:19:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 02:19:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-25 02:19:08,942 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 41 [2020-09-25 02:19:08,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:08,943 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-25 02:19:08,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 02:19:08,943 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-25 02:19:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 02:19:08,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:08,944 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:08,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:19:08,945 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:08,946 INFO L82 PathProgramCache]: Analyzing trace with hash 765701111, now seen corresponding path program 3 times [2020-09-25 02:19:08,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:08,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623303723] [2020-09-25 02:19:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:08,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 02:19:09,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:09,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-09-25 02:19:09,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 02:19:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:19:09,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 02:19:09,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:09,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:09,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:09,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:19:09,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:09,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:09,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:09,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:09,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623303723] [2020-09-25 02:19:09,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:09,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 02:19:09,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112132656] [2020-09-25 02:19:09,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 02:19:09,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:09,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 02:19:09,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:19:09,527 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2020-09-25 02:19:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:09,823 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-09-25 02:19:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 02:19:09,824 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-09-25 02:19:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:09,825 INFO L225 Difference]: With dead ends: 79 [2020-09-25 02:19:09,825 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 02:19:09,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2020-09-25 02:19:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 02:19:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-25 02:19:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 02:19:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-09-25 02:19:09,833 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2020-09-25 02:19:09,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:09,833 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-09-25 02:19:09,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 02:19:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-09-25 02:19:09,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 02:19:09,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:09,835 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:09,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:19:09,835 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:09,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:09,836 INFO L82 PathProgramCache]: Analyzing trace with hash -258080061, now seen corresponding path program 4 times [2020-09-25 02:19:09,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:09,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84755101] [2020-09-25 02:19:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:10,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 02:19:10,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:10,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-09-25 02:19:10,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 02:19:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:19:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 02:19:10,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:10,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:10,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:10,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:10,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:10,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:19:10,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:10,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:10,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:10,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:10,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:10,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84755101] [2020-09-25 02:19:10,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:10,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 02:19:10,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063443130] [2020-09-25 02:19:10,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 02:19:10,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:10,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 02:19:10,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-09-25 02:19:10,657 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2020-09-25 02:19:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:11,056 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-09-25 02:19:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 02:19:11,057 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-09-25 02:19:11,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:11,058 INFO L225 Difference]: With dead ends: 87 [2020-09-25 02:19:11,058 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 02:19:11,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 02:19:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 02:19:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-09-25 02:19:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 02:19:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-25 02:19:11,066 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2020-09-25 02:19:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:11,067 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-25 02:19:11,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 02:19:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-25 02:19:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 02:19:11,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:11,068 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:11,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 02:19:11,069 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1030394231, now seen corresponding path program 5 times [2020-09-25 02:19:11,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:11,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618611743] [2020-09-25 02:19:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 02:19:11,089 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 02:19:11,089 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 02:19:11,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 02:19:11,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:19:11 BoogieIcfgContainer [2020-09-25 02:19:11,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:19:11,118 INFO L168 Benchmark]: Toolchain (without parser) took 7015.31 ms. Allocated memory was 147.3 MB in the beginning and 276.8 MB in the end (delta: 129.5 MB). Free memory was 102.8 MB in the beginning and 215.4 MB in the end (delta: -112.6 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:11,119 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 147.3 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 02:19:11,120 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.36 ms. Allocated memory is still 147.3 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:11,121 INFO L168 Benchmark]: Boogie Preprocessor took 116.66 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 92.8 MB in the beginning and 182.9 MB in the end (delta: -90.1 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:11,122 INFO L168 Benchmark]: RCFGBuilder took 333.81 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:11,123 INFO L168 Benchmark]: TraceAbstraction took 6220.58 ms. Allocated memory was 202.9 MB in the beginning and 276.8 MB in the end (delta: 73.9 MB). Free memory was 168.8 MB in the beginning and 215.4 MB in the end (delta: -46.5 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:11,126 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 147.3 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.36 ms. Allocated memory is still 147.3 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.66 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 92.8 MB in the beginning and 182.9 MB in the end (delta: -90.1 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.81 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6220.58 ms. Allocated memory was 202.9 MB in the beginning and 276.8 MB in the end (delta: 73.9 MB). Free memory was 168.8 MB in the beginning and 215.4 MB in the end (delta: -46.5 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i