/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:32:03,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:32:03,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:32:03,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:32:03,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:32:03,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:32:03,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:32:03,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:32:03,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:32:03,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:32:03,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:32:03,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:32:03,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:32:03,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:32:03,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:32:03,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:32:03,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:32:03,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:32:03,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:32:03,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:32:03,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:32:03,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:32:03,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:32:03,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:32:03,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:32:03,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:32:03,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:32:03,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:32:03,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:32:03,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:32:03,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:32:03,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:32:03,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:32:03,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:32:03,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:32:03,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:32:03,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:32:03,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:32:03,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:32:03,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:32:03,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:32:03,495 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 11:32:03,539 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:32:03,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:32:03,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:32:03,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:32:03,542 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:32:03,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:32:03,543 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:32:03,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:32:03,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:32:03,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:32:03,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:32:03,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:32:03,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:32:03,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:32:03,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:32:03,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:32:03,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:32:03,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:32:03,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:32:03,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:32:03,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:32:03,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:32:03,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:32:03,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:32:03,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:32:03,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:32:03,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:32:03,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:32:03,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:32:03,549 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:32:04,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:32:04,080 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:32:04,087 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:32:04,089 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:32:04,090 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:32:04,091 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-09-21 11:32:04,192 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b12dba567/eb65d4a3ad0247f395f1be12ba513c27/FLAG7b5d82047 [2020-09-21 11:32:04,771 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:32:04,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-09-21 11:32:04,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b12dba567/eb65d4a3ad0247f395f1be12ba513c27/FLAG7b5d82047 [2020-09-21 11:32:05,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b12dba567/eb65d4a3ad0247f395f1be12ba513c27 [2020-09-21 11:32:05,124 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:32:05,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:32:05,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:05,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:32:05,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:32:05,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:05" (1/1) ... [2020-09-21 11:32:05,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1aada5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:05, skipping insertion in model container [2020-09-21 11:32:05,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:05" (1/1) ... [2020-09-21 11:32:05,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:32:05,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:32:05,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:05,428 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:32:05,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:05,479 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:32:05,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:05 WrapperNode [2020-09-21 11:32:05,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:05,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:32:05,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:32:05,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:32:05,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:05" (1/1) ... [2020-09-21 11:32:05,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:05" (1/1) ... [2020-09-21 11:32:05,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:05" (1/1) ... [2020-09-21 11:32:05,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:05" (1/1) ... [2020-09-21 11:32:05,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:05" (1/1) ... [2020-09-21 11:32:05,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:05" (1/1) ... [2020-09-21 11:32:05,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:05" (1/1) ... [2020-09-21 11:32:05,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:32:05,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:32:05,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:32:05,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:32:05,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:05" (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 11:32:05,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:32:05,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:32:05,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:32:05,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:32:05,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:32:05,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:32:05,739 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:32:05,739 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:32:05,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:32:05,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:32:05,740 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:32:05,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:32:05,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:32:05,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:32:05,967 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 11:32:05,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:05 BoogieIcfgContainer [2020-09-21 11:32:05,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:32:05,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:32:05,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:32:05,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:32:05,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:32:05" (1/3) ... [2020-09-21 11:32:05,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a134c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:05, skipping insertion in model container [2020-09-21 11:32:05,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:05" (2/3) ... [2020-09-21 11:32:05,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a134c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:05, skipping insertion in model container [2020-09-21 11:32:05,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:05" (3/3) ... [2020-09-21 11:32:05,983 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-09-21 11:32:05,996 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:32:06,006 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:32:06,046 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:32:06,114 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:32:06,114 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:32:06,114 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:32:06,114 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:32:06,114 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:32:06,114 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:32:06,114 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:32:06,114 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:32:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-09-21 11:32:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 11:32:06,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:06,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:06,161 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1039733575, now seen corresponding path program 1 times [2020-09-21 11:32:06,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:06,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070588041] [2020-09-21 11:32:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,333 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,333 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,334 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,334 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:32:06,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:32:06,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:06,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:06,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:06,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:06,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,368 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,368 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,368 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,369 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:06,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:06,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:06,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:06,377 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 11:32:06,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070588041] [2020-09-21 11:32:06,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:06,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 11:32:06,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187813417] [2020-09-21 11:32:06,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 11:32:06,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:06,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 11:32:06,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:32:06,407 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-09-21 11:32:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:06,434 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-09-21 11:32:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 11:32:06,435 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 11:32:06,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:06,444 INFO L225 Difference]: With dead ends: 37 [2020-09-21 11:32:06,444 INFO L226 Difference]: Without dead ends: 14 [2020-09-21 11:32:06,448 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 [2020-09-21 11:32:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-21 11:32:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-21 11:32:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-21 11:32:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-09-21 11:32:06,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-09-21 11:32:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:06,497 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-09-21 11:32:06,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 11:32:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-09-21 11:32:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 11:32:06,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:06,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:06,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:32:06,499 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:06,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1066515684, now seen corresponding path program 1 times [2020-09-21 11:32:06,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:06,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209339507] [2020-09-21 11:32:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,543 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,543 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,543 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,544 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:32:06,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:32:06,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:06,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:06,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:32:06,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:06,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,588 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,588 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,588 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,589 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:06,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:06,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:06,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:06,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:06,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:06,594 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 11:32:06,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209339507] [2020-09-21 11:32:06,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:06,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:32:06,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940392096] [2020-09-21 11:32:06,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:32:06,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:06,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:32:06,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:32:06,599 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-09-21 11:32:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:06,620 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-09-21 11:32:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:32:06,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-21 11:32:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:06,622 INFO L225 Difference]: With dead ends: 20 [2020-09-21 11:32:06,622 INFO L226 Difference]: Without dead ends: 15 [2020-09-21 11:32:06,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:32:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-09-21 11:32:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-09-21 11:32:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-21 11:32:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-09-21 11:32:06,630 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2020-09-21 11:32:06,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:06,630 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-09-21 11:32:06,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:32:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-09-21 11:32:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 11:32:06,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:06,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:06,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:32:06,633 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1875131310, now seen corresponding path program 1 times [2020-09-21 11:32:06,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:06,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134963006] [2020-09-21 11:32:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,656 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,657 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,657 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,657 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:32:06,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:32:06,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 11:32:06,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:06,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,690 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,690 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,690 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,691 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:06,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:06,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:06,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:06,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134963006] [2020-09-21 11:32:06,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:06,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:32:06,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493102729] [2020-09-21 11:32:06,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:32:06,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:06,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:32:06,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:32:06,700 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-09-21 11:32:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:06,713 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-09-21 11:32:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:32:06,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-09-21 11:32:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:06,719 INFO L225 Difference]: With dead ends: 25 [2020-09-21 11:32:06,719 INFO L226 Difference]: Without dead ends: 16 [2020-09-21 11:32:06,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:32:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-21 11:32:06,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-21 11:32:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 11:32:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-09-21 11:32:06,727 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2020-09-21 11:32:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:06,727 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-09-21 11:32:06,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:32:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-09-21 11:32:06,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 11:32:06,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:06,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:06,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:32:06,729 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:06,730 INFO L82 PathProgramCache]: Analyzing trace with hash -224898986, now seen corresponding path program 1 times [2020-09-21 11:32:06,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:06,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445978290] [2020-09-21 11:32:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,759 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,760 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,760 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,760 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 11:32:06,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:32:06,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:06,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:32:06,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:06,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,814 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,814 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,814 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,815 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:06,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:06,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:06,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:06,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:06,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:06,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445978290] [2020-09-21 11:32:06,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:06,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:32:06,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061063899] [2020-09-21 11:32:06,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:06,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:06,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:06,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:06,824 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-09-21 11:32:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:06,881 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-09-21 11:32:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:06,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-21 11:32:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:06,883 INFO L225 Difference]: With dead ends: 26 [2020-09-21 11:32:06,883 INFO L226 Difference]: Without dead ends: 17 [2020-09-21 11:32:06,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-21 11:32:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-09-21 11:32:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-21 11:32:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-09-21 11:32:06,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2020-09-21 11:32:06,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:06,891 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-09-21 11:32:06,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-09-21 11:32:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:32:06,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:06,892 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:06,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:32:06,893 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:06,893 INFO L82 PathProgramCache]: Analyzing trace with hash -901328722, now seen corresponding path program 2 times [2020-09-21 11:32:06,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:06,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78699798] [2020-09-21 11:32:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,939 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,939 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,939 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,940 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:32:06,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-21 11:32:06,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:32:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:32:06,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:06,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,990 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,990 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,990 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,991 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:06,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:06,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:06,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:06,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:06,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:06,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78699798] [2020-09-21 11:32:06,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:06,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:32:06,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429089342] [2020-09-21 11:32:06,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:32:06,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:32:06,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:06,999 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-09-21 11:32:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:07,102 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-09-21 11:32:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:32:07,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-21 11:32:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:07,104 INFO L225 Difference]: With dead ends: 27 [2020-09-21 11:32:07,104 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 11:32:07,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 11:32:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 11:32:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:32:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-09-21 11:32:07,112 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2020-09-21 11:32:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:07,113 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-09-21 11:32:07,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:32:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-09-21 11:32:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 11:32:07,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:07,114 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:07,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:32:07,115 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:07,115 INFO L82 PathProgramCache]: Analyzing trace with hash -395814058, now seen corresponding path program 3 times [2020-09-21 11:32:07,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:07,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341698278] [2020-09-21 11:32:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:07,154 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:07,155 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:07,155 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:07,155 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:07,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:32:07,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:07,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:32:07,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:07,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:32:07,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:07,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:32:07,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:07,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:07,230 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:07,230 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:07,230 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:07,231 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:07,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:07,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:07,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:07,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:07,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:07,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:07,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:07,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:07,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341698278] [2020-09-21 11:32:07,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:07,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:32:07,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692830474] [2020-09-21 11:32:07,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:32:07,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:32:07,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:07,245 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2020-09-21 11:32:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:07,357 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-09-21 11:32:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:32:07,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-09-21 11:32:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:07,359 INFO L225 Difference]: With dead ends: 28 [2020-09-21 11:32:07,359 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 11:32:07,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 11:32:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-21 11:32:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 11:32:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-09-21 11:32:07,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2020-09-21 11:32:07,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:07,367 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-09-21 11:32:07,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:32:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-09-21 11:32:07,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:32:07,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:07,368 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:07,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:32:07,368 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:07,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:07,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1904728658, now seen corresponding path program 4 times [2020-09-21 11:32:07,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:07,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281757611] [2020-09-21 11:32:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:07,405 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:07,406 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:07,406 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:07,406 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:07,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:32:07,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:07,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:32:07,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:07,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:32:07,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:07,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:32:07,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:07,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:07,491 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:07,492 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:07,492 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:07,492 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:07,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:07,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:07,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:07,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:07,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:07,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281757611] [2020-09-21 11:32:07,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:07,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:32:07,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127250629] [2020-09-21 11:32:07,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:32:07,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:07,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:32:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:07,503 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-09-21 11:32:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:07,669 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-09-21 11:32:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:32:07,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-09-21 11:32:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:07,674 INFO L225 Difference]: With dead ends: 29 [2020-09-21 11:32:07,674 INFO L226 Difference]: Without dead ends: 20 [2020-09-21 11:32:07,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:32:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-21 11:32:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-21 11:32:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 11:32:07,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-09-21 11:32:07,685 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2020-09-21 11:32:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:07,685 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-09-21 11:32:07,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:32:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-09-21 11:32:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:32:07,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:07,687 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:07,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:32:07,687 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:07,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:07,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1436441002, now seen corresponding path program 5 times [2020-09-21 11:32:07,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:07,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410806137] [2020-09-21 11:32:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:07,784 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:07,784 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:07,784 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:07,785 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:07,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:32:07,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:07,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-21 11:32:07,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:07,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:32:07,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:07,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:32:07,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:07,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:07,878 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:07,878 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:07,878 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:07,878 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:07,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:07,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:07,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:07,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:07,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:07,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:07,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:07,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:07,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410806137] [2020-09-21 11:32:07,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:07,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:32:07,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255821018] [2020-09-21 11:32:07,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:32:07,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:32:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:07,885 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2020-09-21 11:32:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:08,041 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-09-21 11:32:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:32:08,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-09-21 11:32:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:08,043 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:32:08,043 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:32:08,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:32:08,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:32:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 11:32:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:32:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-09-21 11:32:08,050 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2020-09-21 11:32:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:08,050 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-09-21 11:32:08,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:32:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-09-21 11:32:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:32:08,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:08,051 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:08,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:32:08,052 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:08,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:08,052 INFO L82 PathProgramCache]: Analyzing trace with hash 195574446, now seen corresponding path program 6 times [2020-09-21 11:32:08,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:08,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460387894] [2020-09-21 11:32:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,067 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,068 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,068 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,068 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:32:08,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:32:08,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:32:08,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:08,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:32:08,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,099 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,099 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,099 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,099 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:08,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:08,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:08,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:08,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:08,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:08,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460387894] [2020-09-21 11:32:08,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:08,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 11:32:08,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056028199] [2020-09-21 11:32:08,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:32:08,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:08,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:32:08,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:32:08,112 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-09-21 11:32:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:08,131 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-09-21 11:32:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:32:08,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-21 11:32:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:08,132 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:32:08,133 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 11:32:08,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:32:08,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 11:32:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-21 11:32:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 11:32:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-09-21 11:32:08,143 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2020-09-21 11:32:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:08,144 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-09-21 11:32:08,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:32:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-09-21 11:32:08,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:32:08,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:08,145 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:08,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:32:08,146 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:08,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash 389290560, now seen corresponding path program 7 times [2020-09-21 11:32:08,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:08,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251759005] [2020-09-21 11:32:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,188 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,188 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,188 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,189 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:32:08,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:32:08,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:08,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:08,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:32:08,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,241 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,241 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,241 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,241 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:08,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:08,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:08,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:08,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:08,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:08,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251759005] [2020-09-21 11:32:08,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:08,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:32:08,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970706808] [2020-09-21 11:32:08,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:08,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:08,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:08,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:08,251 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-09-21 11:32:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:08,285 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-09-21 11:32:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:08,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-21 11:32:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:08,288 INFO L225 Difference]: With dead ends: 34 [2020-09-21 11:32:08,288 INFO L226 Difference]: Without dead ends: 29 [2020-09-21 11:32:08,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-21 11:32:08,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-09-21 11:32:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 11:32:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-09-21 11:32:08,302 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2020-09-21 11:32:08,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:08,305 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-09-21 11:32:08,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-09-21 11:32:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:32:08,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:08,307 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:08,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:32:08,307 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1279139630, now seen corresponding path program 8 times [2020-09-21 11:32:08,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:08,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265727699] [2020-09-21 11:32:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,330 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,331 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,331 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,331 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:32:08,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:32:08,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:32:08,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:08,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:32:08,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,377 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,377 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,377 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,378 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:08,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:08,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:08,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:08,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:08,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:08,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265727699] [2020-09-21 11:32:08,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:08,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:32:08,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426484196] [2020-09-21 11:32:08,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:32:08,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:08,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:32:08,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:08,386 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2020-09-21 11:32:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:08,426 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-09-21 11:32:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:32:08,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-09-21 11:32:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:08,428 INFO L225 Difference]: With dead ends: 38 [2020-09-21 11:32:08,428 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 11:32:08,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 11:32:08,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-21 11:32:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:32:08,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-09-21 11:32:08,435 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 28 [2020-09-21 11:32:08,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:08,435 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-09-21 11:32:08,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:32:08,436 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-09-21 11:32:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 11:32:08,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:08,437 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:08,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:32:08,437 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:08,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:08,438 INFO L82 PathProgramCache]: Analyzing trace with hash 805703268, now seen corresponding path program 9 times [2020-09-21 11:32:08,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:08,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2842700] [2020-09-21 11:32:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,476 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,476 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,476 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,476 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 11:32:08,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:32:08,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:32:08,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:08,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:32:08,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,553 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,553 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,553 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,553 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:08,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:08,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:08,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:08,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:08,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:08,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2842700] [2020-09-21 11:32:08,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:08,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:32:08,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696450933] [2020-09-21 11:32:08,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:32:08,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:08,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:32:08,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:32:08,560 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 10 states. [2020-09-21 11:32:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:08,760 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2020-09-21 11:32:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:32:08,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-09-21 11:32:08,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:08,761 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:32:08,762 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 11:32:08,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:32:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 11:32:08,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-09-21 11:32:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 11:32:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-09-21 11:32:08,775 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 32 [2020-09-21 11:32:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:08,775 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-09-21 11:32:08,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:32:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-09-21 11:32:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:32:08,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:08,780 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:08,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:32:08,786 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:08,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:08,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1833781516, now seen corresponding path program 10 times [2020-09-21 11:32:08,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:08,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837757964] [2020-09-21 11:32:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,860 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,861 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,861 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,862 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:32:08,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-21 11:32:08,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:32:08,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:08,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:32:08,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,954 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,954 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,955 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,955 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:08,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:08,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:08,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:08,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:08,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 11:32:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:08,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837757964] [2020-09-21 11:32:08,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:08,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:32:08,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095939707] [2020-09-21 11:32:08,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:32:08,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:32:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:08,969 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 11 states. [2020-09-21 11:32:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:09,198 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-09-21 11:32:09,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:32:09,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-09-21 11:32:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:09,200 INFO L225 Difference]: With dead ends: 55 [2020-09-21 11:32:09,200 INFO L226 Difference]: Without dead ends: 35 [2020-09-21 11:32:09,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:32:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-21 11:32:09,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-21 11:32:09,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 11:32:09,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-09-21 11:32:09,207 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 33 [2020-09-21 11:32:09,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:09,208 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-09-21 11:32:09,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:32:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-09-21 11:32:09,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 11:32:09,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:09,209 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:09,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:32:09,209 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:09,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:09,210 INFO L82 PathProgramCache]: Analyzing trace with hash -655531164, now seen corresponding path program 11 times [2020-09-21 11:32:09,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:09,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456438277] [2020-09-21 11:32:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:09,250 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:09,251 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:09,251 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:09,251 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:09,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 11:32:09,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:09,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:32:09,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:32:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:32:09,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:09,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:09,368 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:09,369 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:09,369 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:09,369 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:09,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:09,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:09,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:09,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:09,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:09,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:09,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:09,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 31 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:09,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456438277] [2020-09-21 11:32:09,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:09,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:32:09,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452546750] [2020-09-21 11:32:09,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:32:09,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:09,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:32:09,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:32:09,376 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 12 states. [2020-09-21 11:32:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:09,646 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2020-09-21 11:32:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:32:09,647 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-09-21 11:32:09,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:09,647 INFO L225 Difference]: With dead ends: 56 [2020-09-21 11:32:09,647 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 11:32:09,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:32:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 11:32:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-21 11:32:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 11:32:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-09-21 11:32:09,655 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 34 [2020-09-21 11:32:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:09,655 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-09-21 11:32:09,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:32:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-09-21 11:32:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 11:32:09,656 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:09,657 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:09,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:32:09,657 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash -514812916, now seen corresponding path program 12 times [2020-09-21 11:32:09,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:09,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722343008] [2020-09-21 11:32:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:09,702 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:09,702 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:09,702 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:09,703 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:09,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 11:32:09,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:09,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 11:32:09,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:32:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:32:09,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:09,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:09,825 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:09,825 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:09,825 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:09,826 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:09,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:09,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:09,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:09,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:09,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:09,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:09,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:09,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 34 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:09,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722343008] [2020-09-21 11:32:09,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:09,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:32:09,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034828786] [2020-09-21 11:32:09,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:32:09,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:09,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:32:09,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:32:09,832 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 13 states. [2020-09-21 11:32:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:10,201 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2020-09-21 11:32:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:32:10,203 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-09-21 11:32:10,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:10,204 INFO L225 Difference]: With dead ends: 57 [2020-09-21 11:32:10,204 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 11:32:10,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:32:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 11:32:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-21 11:32:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 11:32:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-09-21 11:32:10,217 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 35 [2020-09-21 11:32:10,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:10,217 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-09-21 11:32:10,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:32:10,217 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-09-21 11:32:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 11:32:10,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:10,218 INFO L422 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:10,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 11:32:10,219 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash -447514524, now seen corresponding path program 13 times [2020-09-21 11:32:10,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:10,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399958382] [2020-09-21 11:32:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:10,289 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:10,290 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:10,290 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:10,290 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:10,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 11:32:10,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:10,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-21 11:32:10,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:32:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:32:10,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:10,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:10,423 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:10,424 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:10,424 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:10,424 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:10,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:10,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:10,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:10,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:10,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:10,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:10,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:10,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:10,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399958382] [2020-09-21 11:32:10,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:10,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 11:32:10,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075030793] [2020-09-21 11:32:10,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 11:32:10,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:10,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 11:32:10,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:32:10,431 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 14 states. [2020-09-21 11:32:10,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:10,826 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-09-21 11:32:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:32:10,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-09-21 11:32:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:10,828 INFO L225 Difference]: With dead ends: 58 [2020-09-21 11:32:10,828 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 11:32:10,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:32:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 11:32:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-09-21 11:32:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 11:32:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-09-21 11:32:10,835 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 36 [2020-09-21 11:32:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:10,836 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-09-21 11:32:10,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 11:32:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-09-21 11:32:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 11:32:10,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:10,837 INFO L422 BasicCegarLoop]: trace histogram [11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:10,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 11:32:10,837 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:10,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1638735628, now seen corresponding path program 14 times [2020-09-21 11:32:10,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:10,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804368815] [2020-09-21 11:32:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:10,895 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:10,895 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:10,895 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:10,896 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:10,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:32:10,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:10,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-21 11:32:10,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:10,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:32:10,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:10,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:32:10,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:11,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:11,038 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:11,038 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:11,038 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:11,039 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:11,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:11,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:11,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:11,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:11,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:11,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:11,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:11,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 40 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:11,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804368815] [2020-09-21 11:32:11,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:11,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:32:11,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376698332] [2020-09-21 11:32:11,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:32:11,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:11,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:32:11,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:32:11,046 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 15 states. [2020-09-21 11:32:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:11,496 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2020-09-21 11:32:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:32:11,496 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-09-21 11:32:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:11,497 INFO L225 Difference]: With dead ends: 59 [2020-09-21 11:32:11,497 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 11:32:11,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:32:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 11:32:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-21 11:32:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 11:32:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-09-21 11:32:11,504 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 37 [2020-09-21 11:32:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:11,505 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-09-21 11:32:11,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:32:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-09-21 11:32:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 11:32:11,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:11,506 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:11,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 11:32:11,506 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:11,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:11,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1887980900, now seen corresponding path program 15 times [2020-09-21 11:32:11,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:11,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424710225] [2020-09-21 11:32:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:11,567 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:11,567 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:11,567 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:11,568 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:11,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 11:32:11,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:11,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-21 11:32:11,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:11,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:32:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:32:11,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:11,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:11,795 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:11,795 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:11,795 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:11,795 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:11,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:11,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:11,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:11,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:11,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:11,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 43 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:11,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424710225] [2020-09-21 11:32:11,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:11,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 11:32:11,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598154052] [2020-09-21 11:32:11,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 11:32:11,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:11,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 11:32:11,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:32:11,804 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 16 states. [2020-09-21 11:32:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:12,349 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2020-09-21 11:32:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:32:12,351 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-09-21 11:32:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:12,352 INFO L225 Difference]: With dead ends: 60 [2020-09-21 11:32:12,352 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 11:32:12,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:32:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 11:32:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-21 11:32:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 11:32:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-09-21 11:32:12,363 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 38 [2020-09-21 11:32:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:12,363 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-09-21 11:32:12,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 11:32:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-09-21 11:32:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 11:32:12,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:12,365 INFO L422 BasicCegarLoop]: trace histogram [13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:12,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 11:32:12,365 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:12,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1024649740, now seen corresponding path program 16 times [2020-09-21 11:32:12,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:12,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991244605] [2020-09-21 11:32:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:12,477 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:12,477 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:12,478 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:12,478 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:12,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-21 11:32:12,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:12,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-21 11:32:12,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:32:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:32:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:12,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:12,887 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:12,887 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:12,887 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:12,888 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:12,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:12,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:12,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:12,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:12,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:12,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:12,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:12,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 46 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:12,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991244605] [2020-09-21 11:32:12,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:12,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 11:32:12,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126131868] [2020-09-21 11:32:12,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 11:32:12,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 11:32:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:32:12,897 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 16 states. [2020-09-21 11:32:13,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:13,144 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-09-21 11:32:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 11:32:13,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-09-21 11:32:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:13,145 INFO L225 Difference]: With dead ends: 61 [2020-09-21 11:32:13,145 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 11:32:13,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:32:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 11:32:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-09-21 11:32:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 11:32:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-09-21 11:32:13,155 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 39 [2020-09-21 11:32:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:13,156 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-09-21 11:32:13,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 11:32:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-09-21 11:32:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 11:32:13,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:13,157 INFO L422 BasicCegarLoop]: trace histogram [14, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:13,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 11:32:13,157 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:13,157 INFO L82 PathProgramCache]: Analyzing trace with hash 31187556, now seen corresponding path program 17 times [2020-09-21 11:32:13,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:13,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868806166] [2020-09-21 11:32:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:13,244 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:13,244 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:13,245 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:13,245 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:13,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 11:32:13,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:13,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-21 11:32:13,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:13,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:32:13,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:13,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 11:32:13,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:13,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:13,446 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:13,446 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:13,447 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:13,447 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:13,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:13,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:13,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:13,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:13,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:13,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:13,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:13,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 49 proven. 105 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:13,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868806166] [2020-09-21 11:32:13,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:13,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 11:32:13,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730151247] [2020-09-21 11:32:13,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 11:32:13,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:13,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 11:32:13,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:32:13,454 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 18 states. [2020-09-21 11:32:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:14,098 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-09-21 11:32:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 11:32:14,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-09-21 11:32:14,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:14,101 INFO L225 Difference]: With dead ends: 62 [2020-09-21 11:32:14,101 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 11:32:14,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=752, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 11:32:14,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 11:32:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-21 11:32:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 11:32:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-09-21 11:32:14,110 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 40 [2020-09-21 11:32:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:14,110 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-09-21 11:32:14,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 11:32:14,111 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-09-21 11:32:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 11:32:14,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:14,111 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:14,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 11:32:14,112 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash -701369076, now seen corresponding path program 18 times [2020-09-21 11:32:14,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:14,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063741849] [2020-09-21 11:32:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:14,189 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:14,190 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:14,190 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:14,190 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:14,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 11:32:14,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:14,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-21 11:32:14,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:32:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:32:14,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:14,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:14,460 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:14,460 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:14,460 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:14,461 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:14,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:14,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:14,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:14,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:14,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:14,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:14,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:14,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 52 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:14,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063741849] [2020-09-21 11:32:14,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:14,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 11:32:14,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664894533] [2020-09-21 11:32:14,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 11:32:14,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 11:32:14,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:32:14,468 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 19 states. [2020-09-21 11:32:15,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:15,213 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-09-21 11:32:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 11:32:15,214 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-09-21 11:32:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:15,215 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:32:15,215 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 11:32:15,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 11:32:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 11:32:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-21 11:32:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 11:32:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-09-21 11:32:15,223 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 41 [2020-09-21 11:32:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:15,223 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-09-21 11:32:15,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 11:32:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-09-21 11:32:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 11:32:15,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:15,224 INFO L422 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:15,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 11:32:15,225 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:15,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:15,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1935788188, now seen corresponding path program 19 times [2020-09-21 11:32:15,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:15,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238988070] [2020-09-21 11:32:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:15,315 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:15,315 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:15,315 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:15,315 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:15,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 11:32:15,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:15,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-21 11:32:15,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:15,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:32:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 11:32:15,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:15,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:15,781 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:15,781 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:15,781 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:15,781 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:15,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:15,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:15,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:15,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:15,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:15,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:15,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:15,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 55 proven. 136 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:15,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238988070] [2020-09-21 11:32:15,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:15,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 11:32:15,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621234729] [2020-09-21 11:32:15,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 11:32:15,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:15,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 11:32:15,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:32:15,789 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 19 states. [2020-09-21 11:32:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:16,191 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2020-09-21 11:32:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 11:32:16,193 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-09-21 11:32:16,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:16,194 INFO L225 Difference]: With dead ends: 64 [2020-09-21 11:32:16,194 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 11:32:16,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:32:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 11:32:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-21 11:32:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:32:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-09-21 11:32:16,214 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 42 [2020-09-21 11:32:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:16,214 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-09-21 11:32:16,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 11:32:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-09-21 11:32:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 11:32:16,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:16,216 INFO L422 BasicCegarLoop]: trace histogram [17, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:16,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 11:32:16,216 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:16,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:16,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1548074996, now seen corresponding path program 20 times [2020-09-21 11:32:16,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:16,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756596599] [2020-09-21 11:32:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:16,332 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:16,333 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:16,333 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:16,333 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:16,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-21 11:32:16,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:16,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-21 11:32:16,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:16,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 11:32:16,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:16,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:32:16,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:16,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:16,890 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:16,890 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:16,891 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:16,891 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:16,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:16,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:16,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:16,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:16,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 58 proven. 153 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:16,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756596599] [2020-09-21 11:32:16,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:16,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 11:32:16,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484439865] [2020-09-21 11:32:16,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 11:32:16,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:16,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 11:32:16,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:32:16,908 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 20 states. [2020-09-21 11:32:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:17,350 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-09-21 11:32:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 11:32:17,351 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-09-21 11:32:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:17,351 INFO L225 Difference]: With dead ends: 65 [2020-09-21 11:32:17,352 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 11:32:17,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:32:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 11:32:17,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-21 11:32:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 11:32:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-09-21 11:32:17,360 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 43 [2020-09-21 11:32:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:17,360 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-09-21 11:32:17,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 11:32:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-09-21 11:32:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 11:32:17,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:17,361 INFO L422 BasicCegarLoop]: trace histogram [18, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:17,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 11:32:17,362 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:17,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:17,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1881099364, now seen corresponding path program 21 times [2020-09-21 11:32:17,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:17,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619847813] [2020-09-21 11:32:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:17,480 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:17,481 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:17,481 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:17,481 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:17,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-21 11:32:17,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:17,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-21 11:32:17,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 11:32:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 11:32:17,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:17,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:17,789 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:17,789 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:17,790 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:17,790 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:17,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:17,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:17,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:17,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:17,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:17,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:17,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:17,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 61 proven. 171 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:17,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619847813] [2020-09-21 11:32:17,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:17,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 11:32:17,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119922120] [2020-09-21 11:32:17,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 11:32:17,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:17,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 11:32:17,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:32:17,799 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 22 states. [2020-09-21 11:32:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:18,800 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-09-21 11:32:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 11:32:18,801 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2020-09-21 11:32:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:18,802 INFO L225 Difference]: With dead ends: 66 [2020-09-21 11:32:18,802 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:32:18,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=460, Invalid=1180, Unknown=0, NotChecked=0, Total=1640 [2020-09-21 11:32:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:32:18,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-09-21 11:32:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 11:32:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-09-21 11:32:18,812 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 44 [2020-09-21 11:32:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:18,813 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-09-21 11:32:18,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 11:32:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-09-21 11:32:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 11:32:18,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:18,814 INFO L422 BasicCegarLoop]: trace histogram [19, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:18,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 11:32:18,814 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:18,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:18,815 INFO L82 PathProgramCache]: Analyzing trace with hash 811322124, now seen corresponding path program 22 times [2020-09-21 11:32:18,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:18,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465645996] [2020-09-21 11:32:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:18,966 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:18,966 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:18,966 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:18,967 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:18,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 11:32:18,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:18,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-21 11:32:18,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:18,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 11:32:18,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:18,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:32:18,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:19,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:19,596 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:19,596 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:19,596 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:19,597 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:19,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:19,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:19,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:19,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:19,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:19,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:19,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:19,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 64 proven. 190 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:19,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465645996] [2020-09-21 11:32:19,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:19,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 11:32:19,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129637367] [2020-09-21 11:32:19,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 11:32:19,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 11:32:19,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:32:19,604 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 22 states. [2020-09-21 11:32:19,746 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 13 [2020-09-21 11:32:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:20,141 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-09-21 11:32:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 11:32:20,142 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-09-21 11:32:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:20,142 INFO L225 Difference]: With dead ends: 67 [2020-09-21 11:32:20,142 INFO L226 Difference]: Without dead ends: 47 [2020-09-21 11:32:20,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:32:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-21 11:32:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-21 11:32:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 11:32:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-09-21 11:32:20,159 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 45 [2020-09-21 11:32:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:20,159 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-09-21 11:32:20,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 11:32:20,159 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-09-21 11:32:20,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 11:32:20,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:20,160 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:20,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 11:32:20,160 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:20,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:20,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2007966052, now seen corresponding path program 23 times [2020-09-21 11:32:20,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:20,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265643332] [2020-09-21 11:32:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:20,296 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:20,297 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:20,297 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:20,297 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:20,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 11:32:20,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:20,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-21 11:32:20,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-21 11:32:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:32:20,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:20,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:20,669 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:20,670 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:20,670 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:20,670 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:20,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:20,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:20,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:20,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:20,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:20,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:20,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:20,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 67 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:20,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265643332] [2020-09-21 11:32:20,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:20,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 11:32:20,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847864963] [2020-09-21 11:32:20,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 11:32:20,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:20,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 11:32:20,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:32:20,683 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 24 states. [2020-09-21 11:32:21,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:21,920 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-09-21 11:32:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 11:32:21,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-09-21 11:32:21,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:21,922 INFO L225 Difference]: With dead ends: 68 [2020-09-21 11:32:21,922 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 11:32:21,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=550, Invalid=1430, Unknown=0, NotChecked=0, Total=1980 [2020-09-21 11:32:21,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 11:32:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-21 11:32:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 11:32:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-09-21 11:32:21,930 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 46 [2020-09-21 11:32:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:21,931 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-09-21 11:32:21,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 11:32:21,931 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-09-21 11:32:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 11:32:21,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:21,932 INFO L422 BasicCegarLoop]: trace histogram [21, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:21,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 11:32:21,932 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:21,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:21,933 INFO L82 PathProgramCache]: Analyzing trace with hash 449222156, now seen corresponding path program 24 times [2020-09-21 11:32:21,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:21,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821768707] [2020-09-21 11:32:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:22,065 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:22,065 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:22,066 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:22,066 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:22,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-21 11:32:22,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:22,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-21 11:32:22,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-21 11:32:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:32:22,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:22,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:22,986 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:22,986 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:22,987 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:22,987 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:22,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:22,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:22,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:22,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:22,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:22,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 70 proven. 231 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 11:32:23,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821768707] [2020-09-21 11:32:23,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:23,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 11:32:23,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063745722] [2020-09-21 11:32:23,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 11:32:23,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:23,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 11:32:23,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:32:23,005 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 24 states. [2020-09-21 11:32:23,183 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 13 [2020-09-21 11:32:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:23,715 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-09-21 11:32:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 11:32:23,716 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-09-21 11:32:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:23,717 INFO L225 Difference]: With dead ends: 69 [2020-09-21 11:32:23,717 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 11:32:23,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:32:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 11:32:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-21 11:32:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-21 11:32:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-09-21 11:32:23,728 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 47 [2020-09-21 11:32:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:23,728 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-09-21 11:32:23,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 11:32:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-09-21 11:32:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 11:32:23,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:23,730 INFO L422 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:23,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 11:32:23,730 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash -627198364, now seen corresponding path program 25 times [2020-09-21 11:32:23,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:23,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362210333] [2020-09-21 11:32:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:23,757 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:23,758 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:23,758 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:23,758 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:23,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 11:32:23,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:23,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:32:23,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:23,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:23,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-09-21 11:32:23,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:32:23,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:23,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:23,812 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:23,813 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:23,814 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:23,814 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:23,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:23,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:23,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:23,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:23,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:23,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:23,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:23,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2020-09-21 11:32:23,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362210333] [2020-09-21 11:32:23,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:23,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:23,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232151992] [2020-09-21 11:32:23,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:23,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:23,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:23,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:23,820 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 5 states. [2020-09-21 11:32:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:23,844 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-09-21 11:32:23,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:23,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-09-21 11:32:23,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:23,845 INFO L225 Difference]: With dead ends: 66 [2020-09-21 11:32:23,845 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:32:23,845 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 [2020-09-21 11:32:23,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:32:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:32:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:32:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:32:23,846 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-09-21 11:32:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:23,846 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:32:23,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:32:23,847 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:32:23,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 11:32:23,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:32:24,133 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 7 [2020-09-21 11:32:24,375 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 17 [2020-09-21 11:32:24,382 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 11:32:24,382 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:24,382 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:24,382 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:32:24,383 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:32:24,383 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:32:24,383 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:24,384 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-21 11:32:24,384 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:24,384 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:24,384 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 30) no Hoare annotation was computed. [2020-09-21 11:32:24,384 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 30) no Hoare annotation was computed. [2020-09-21 11:32:24,384 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-09-21 11:32:24,384 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-09-21 11:32:24,385 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= main_~k~0 4) [2020-09-21 11:32:24,385 INFO L264 CegarLoopResult]: At program point L24-3(lines 18 27) the Hoare annotation is: (or (let ((.cse0 (+ main_~j~0 100))) (and (<= 0 .cse0) (<= (+ (* 9 main_~i~0) main_~j~0 100) 0) (<= .cse0 (* 4 main_~i~0)))) (= main_~k~0 4)) [2020-09-21 11:32:24,385 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 22) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2020-09-21 11:32:24,385 INFO L268 CegarLoopResult]: For program point L20-3(lines 20 22) no Hoare annotation was computed. [2020-09-21 11:32:24,385 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= main_~k~0 4) [2020-09-21 11:32:24,385 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-21 11:32:24,385 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-21 11:32:24,385 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 11:32:24,386 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-21 11:32:24,386 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-21 11:32:24,386 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-21 11:32:24,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:32:24 BoogieIcfgContainer [2020-09-21 11:32:24,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:32:24,422 INFO L168 Benchmark]: Toolchain (without parser) took 19296.17 ms. Allocated memory was 140.5 MB in the beginning and 356.5 MB in the end (delta: 216.0 MB). Free memory was 102.8 MB in the beginning and 248.8 MB in the end (delta: -146.0 MB). Peak memory consumption was 70.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:24,425 INFO L168 Benchmark]: CDTParser took 0.94 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-21 11:32:24,430 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.06 ms. Allocated memory is still 140.5 MB. Free memory was 102.4 MB in the beginning and 92.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:24,431 INFO L168 Benchmark]: Boogie Preprocessor took 169.20 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 92.9 MB in the beginning and 185.6 MB in the end (delta: -92.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:24,431 INFO L168 Benchmark]: RCFGBuilder took 320.53 ms. Allocated memory is still 205.5 MB. Free memory was 185.6 MB in the beginning and 171.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:24,432 INFO L168 Benchmark]: TraceAbstraction took 18445.77 ms. Allocated memory was 205.5 MB in the beginning and 356.5 MB in the end (delta: 151.0 MB). Free memory was 171.8 MB in the beginning and 248.8 MB in the end (delta: -77.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:24,434 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.94 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 351.06 ms. Allocated memory is still 140.5 MB. Free memory was 102.4 MB in the beginning and 92.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 169.20 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 92.9 MB in the beginning and 185.6 MB in the end (delta: -92.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 320.53 ms. Allocated memory is still 205.5 MB. Free memory was 185.6 MB in the beginning and 171.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18445.77 ms. Allocated memory was 205.5 MB in the beginning and 356.5 MB in the end (delta: 151.0 MB). Free memory was 171.8 MB in the beginning and 248.8 MB in the end (delta: -77.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: k == 4 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: k == 4 || i <= 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((0 <= j + 100 && 9 * i + j + 100 <= 0) && j + 100 <= 4 * i) || k == 4 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.7s, OverallIterations: 28, TraceHistogramMax: 22, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 404 SDtfs, 15 SDslu, 3127 SDs, 0 SdLazy, 2594 SolverSat, 401 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 561 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 449 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 10.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 28 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 37 PreInvPairs, 73 NumberOfFragments, 43 HoareAnnotationTreeSize, 37 FomulaSimplifications, 3527 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 9 FomulaSimplificationsInter, 239 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 871 NumberOfCodeBlocks, 871 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 843 ConstructedInterpolants, 0 QuantifiedInterpolants, 152646 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 4 PerfectInterpolantSequences, 1512/3323 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...