/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/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:19:22,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:19:22,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:19:22,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:19:22,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:19:22,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:19:22,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:19:22,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:19:22,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:19:22,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:19:22,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:19:22,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:19:22,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:19:22,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:19:22,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:19:22,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:19:22,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:19:22,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:19:22,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:19:22,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:19:22,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:19:22,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:19:22,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:19:22,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:19:22,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:19:22,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:19:22,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:19:22,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:19:22,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:19:22,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:19:22,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:19:22,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:19:22,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:19:22,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:19:22,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:19:22,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:19:22,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:19:22,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:19:22,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:19:22,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:19:22,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:19:22,473 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 11:19:22,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:19:22,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:19:22,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:19:22,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:19:22,523 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:19:22,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:19:22,524 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:19:22,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:19:22,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:19:22,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:19:22,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:19:22,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:19:22,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:19:22,525 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:19:22,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:19:22,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:19:22,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:19:22,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:19:22,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:19:22,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:19:22,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:19:22,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:19:22,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:19:22,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:19:22,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:19:22,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:19:22,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:19:22,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:19:22,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:19:22,529 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 11:19:23,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:19:23,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:19:23,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:19:23,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:19:23,090 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:19:23,092 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-21 11:19:23,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4141389b5/536b9513f34444db9ec6d24f346c3e2e/FLAG0078e99fa [2020-09-21 11:19:23,779 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:19:23,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-21 11:19:23,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4141389b5/536b9513f34444db9ec6d24f346c3e2e/FLAG0078e99fa [2020-09-21 11:19:24,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4141389b5/536b9513f34444db9ec6d24f346c3e2e [2020-09-21 11:19:24,134 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:19:24,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:19:24,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:19:24,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:19:24,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:19:24,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:19:24" (1/1) ... [2020-09-21 11:19:24,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0614b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:24, skipping insertion in model container [2020-09-21 11:19:24,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:19:24" (1/1) ... [2020-09-21 11:19:24,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:19:24,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:19:24,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:19:24,447 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:19:24,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:19:24,487 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:19:24,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:24 WrapperNode [2020-09-21 11:19:24,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:19:24,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:19:24,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:19:24,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:19:24,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:24" (1/1) ... [2020-09-21 11:19:24,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:24" (1/1) ... [2020-09-21 11:19:24,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:24" (1/1) ... [2020-09-21 11:19:24,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:24" (1/1) ... [2020-09-21 11:19:24,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:24" (1/1) ... [2020-09-21 11:19:24,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:24" (1/1) ... [2020-09-21 11:19:24,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:24" (1/1) ... [2020-09-21 11:19:24,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:19:24,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:19:24,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:19:24,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:19:24,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:24" (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 11:19:24,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:19:24,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:19:24,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:19:24,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:19:24,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:19:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 11:19:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:19:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:19:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:19:24,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:19:25,007 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:19:25,007 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:19:25,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:19:25 BoogieIcfgContainer [2020-09-21 11:19:25,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:19:25,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:19:25,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:19:25,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:19:25,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:19:24" (1/3) ... [2020-09-21 11:19:25,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d02ad57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:19:25, skipping insertion in model container [2020-09-21 11:19:25,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:24" (2/3) ... [2020-09-21 11:19:25,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d02ad57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:19:25, skipping insertion in model container [2020-09-21 11:19:25,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:19:25" (3/3) ... [2020-09-21 11:19:25,023 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-09-21 11:19:25,036 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:19:25,047 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:19:25,068 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:19:25,095 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:19:25,096 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:19:25,096 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:19:25,096 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:19:25,096 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:19:25,096 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:19:25,097 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:19:25,097 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:19:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-21 11:19:25,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 11:19:25,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:25,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:25,127 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:25,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times [2020-09-21 11:19:25,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:25,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317890290] [2020-09-21 11:19:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:25,255 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:25,256 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:25,256 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:25,256 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:25,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:19:25,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:25,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:19:25,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:25,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:25,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:19:25,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:25,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:25,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:25,287 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:25,288 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:25,288 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:25,288 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:25,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:19:25,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:25,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:19:25,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:25,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:25,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:25,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:25,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:25,296 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 11:19:25,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317890290] [2020-09-21 11:19:25,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:19:25,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 11:19:25,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603831116] [2020-09-21 11:19:25,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 11:19:25,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:25,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 11:19:25,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:19:25,331 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-09-21 11:19:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:25,363 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-09-21 11:19:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 11:19:25,365 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 11:19:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:25,376 INFO L225 Difference]: With dead ends: 38 [2020-09-21 11:19:25,377 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:19:25,382 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 11:19:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:19:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 11:19:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:19:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-09-21 11:19:25,434 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-09-21 11:19:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:25,434 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-09-21 11:19:25,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 11:19:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-09-21 11:19:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 11:19:25,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:25,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:25,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:19:25,437 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:25,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:25,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times [2020-09-21 11:19:25,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:25,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311736820] [2020-09-21 11:19:25,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:25,493 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:25,494 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:25,494 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:25,495 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:25,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:19:25,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:25,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:19:25,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:19:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:19:25,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:19:25,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:25,663 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2020-09-21 11:19:25,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:25,675 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:25,675 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:25,676 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:25,676 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:25,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:19:25,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:25,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:19:25,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:25,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:25,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:25,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:25,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:25,681 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 11:19:25,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311736820] [2020-09-21 11:19:25,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:19:25,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:19:25,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396928482] [2020-09-21 11:19:25,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:19:25,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:25,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:19:25,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:19:25,687 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states. [2020-09-21 11:19:25,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:25,766 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-09-21 11:19:25,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:19:25,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-21 11:19:25,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:25,771 INFO L225 Difference]: With dead ends: 28 [2020-09-21 11:19:25,771 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 11:19:25,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:19:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 11:19:25,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-21 11:19:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 11:19:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2020-09-21 11:19:25,780 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10 [2020-09-21 11:19:25,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:25,781 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2020-09-21 11:19:25,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:19:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2020-09-21 11:19:25,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:19:25,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:25,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:25,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:19:25,783 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:25,784 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times [2020-09-21 11:19:25,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:25,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101500112] [2020-09-21 11:19:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:25,956 FATAL L256 erpolLogProxyWrapper]: Difference in size: 10 [2020-09-21 11:19:25,956 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -2 [2020-09-21 11:19:25,956 FATAL L256 erpolLogProxyWrapper]: Difference in width: 7 [2020-09-21 11:19:25,957 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:25,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:19:25,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:25,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-21 11:19:25,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:25,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:19:25,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:19:25,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:19:25,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:26,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:26,165 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:26,165 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:26,165 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:26,166 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:26,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:19:26,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:26,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:19:26,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:26,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:26,182 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 11:19:26,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101500112] [2020-09-21 11:19:26,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:19:26,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:19:26,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622713095] [2020-09-21 11:19:26,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:19:26,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:26,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:19:26,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:19:26,187 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 3 states. [2020-09-21 11:19:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:26,317 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2020-09-21 11:19:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:19:26,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 11:19:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:26,320 INFO L225 Difference]: With dead ends: 50 [2020-09-21 11:19:26,321 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 11:19:26,321 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 11:19:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 11:19:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-21 11:19:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:19:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-09-21 11:19:26,331 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2020-09-21 11:19:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:26,332 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-09-21 11:19:26,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:19:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-09-21 11:19:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:19:26,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:26,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:26,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:19:26,334 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times [2020-09-21 11:19:26,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:26,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373956457] [2020-09-21 11:19:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:26,530 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:26,531 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:26,531 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:26,531 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:26,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:19:26,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:26,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-09-21 11:19:26,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:26,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:19:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:19:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:19:26,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:26,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:26,761 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:26,761 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:26,762 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:26,762 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:26,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:19:26,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:26,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:26,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:26,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:26,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:26,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:26,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:19:26,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373956457] [2020-09-21 11:19:26,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:19:26,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:19:26,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007200094] [2020-09-21 11:19:26,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:19:26,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:26,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:19:26,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:19:26,770 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 13 states. [2020-09-21 11:19:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:26,973 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-09-21 11:19:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:19:26,974 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-09-21 11:19:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:26,975 INFO L225 Difference]: With dead ends: 51 [2020-09-21 11:19:26,976 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:19:26,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:19:26,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:19:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-09-21 11:19:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:19:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-09-21 11:19:26,985 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 21 [2020-09-21 11:19:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:26,986 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-09-21 11:19:26,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:19:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-09-21 11:19:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:19:26,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:26,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:26,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:19:26,988 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:26,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1016777103, now seen corresponding path program 1 times [2020-09-21 11:19:26,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:26,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724381135] [2020-09-21 11:19:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:27,008 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:27,009 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:27,009 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:27,009 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:27,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:19:27,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:27,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:19:27,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:27,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:19:27,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:19:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:19:27,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:27,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:27,073 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:27,074 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:27,074 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:27,074 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:27,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:19:27,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:27,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:27,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:27,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:27,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:27,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:27,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:27,078 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 11:19:27,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724381135] [2020-09-21 11:19:27,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:19:27,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:19:27,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142500283] [2020-09-21 11:19:27,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:19:27,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:27,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:19:27,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:19:27,081 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 3 states. [2020-09-21 11:19:27,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:27,157 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-09-21 11:19:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:19:27,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 11:19:27,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:27,159 INFO L225 Difference]: With dead ends: 61 [2020-09-21 11:19:27,159 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 11:19:27,159 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 11:19:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 11:19:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-09-21 11:19:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:19:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-21 11:19:27,167 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 21 [2020-09-21 11:19:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:27,167 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-21 11:19:27,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:19:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-21 11:19:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:19:27,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:27,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:27,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:19:27,169 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:27,170 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times [2020-09-21 11:19:27,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:27,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947852287] [2020-09-21 11:19:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:19:27,195 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:19:27,195 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:19:27,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:19:27,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:19:27 BoogieIcfgContainer [2020-09-21 11:19:27,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:19:27,224 INFO L168 Benchmark]: Toolchain (without parser) took 3087.92 ms. Allocated memory was 138.4 MB in the beginning and 231.2 MB in the end (delta: 92.8 MB). Free memory was 100.1 MB in the beginning and 126.9 MB in the end (delta: -26.8 MB). Peak memory consumption was 66.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:27,225 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:19:27,226 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.85 ms. Allocated memory is still 138.4 MB. Free memory was 99.4 MB in the beginning and 89.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:27,227 INFO L168 Benchmark]: Boogie Preprocessor took 119.24 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 89.4 MB in the beginning and 177.8 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:27,228 INFO L168 Benchmark]: RCFGBuilder took 404.29 ms. Allocated memory is still 199.8 MB. Free memory was 177.8 MB in the beginning and 161.9 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:27,229 INFO L168 Benchmark]: TraceAbstraction took 2207.68 ms. Allocated memory was 199.8 MB in the beginning and 231.2 MB in the end (delta: 31.5 MB). Free memory was 161.3 MB in the beginning and 126.9 MB in the end (delta: 34.4 MB). Peak memory consumption was 65.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:27,233 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 341.85 ms. Allocated memory is still 138.4 MB. Free memory was 99.4 MB in the beginning and 89.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.24 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 89.4 MB in the beginning and 177.8 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 404.29 ms. Allocated memory is still 199.8 MB. Free memory was 177.8 MB in the beginning and 161.9 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2207.68 ms. Allocated memory was 199.8 MB in the beginning and 231.2 MB in the end (delta: 31.5 MB). Free memory was 161.3 MB in the beginning and 126.9 MB in the end (delta: 34.4 MB). Peak memory consumption was 65.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 129 SDtfs, 21 SDslu, 52 SDs, 0 SdLazy, 244 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 4676 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 2/3 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 incorrect! Received shutdown request...