/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --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 0.1.25-177f698 [2020-08-21 22:08:18,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:08:18,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:08:18,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:08:18,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:08:18,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:08:18,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:08:18,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:08:18,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:08:18,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:08:18,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:08:18,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:08:18,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:08:18,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:08:18,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:08:18,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:08:18,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:08:18,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:08:18,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:08:18,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:08:18,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:08:18,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:08:18,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:08:18,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:08:18,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:08:18,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:08:18,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:08:18,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:08:18,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:08:18,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:08:18,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:08:18,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:08:18,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:08:18,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:08:18,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:08:18,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:08:18,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:08:18,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:08:18,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:08:18,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:08:18,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:08:18,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 22:08:18,402 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:08:18,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:08:18,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:08:18,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:08:18,404 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:08:18,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:08:18,405 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:08:18,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:08:18,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:08:18,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:08:18,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:08:18,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:08:18,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:08:18,406 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:08:18,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:08:18,406 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:08:18,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:08:18,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:08:18,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:08:18,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:08:18,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:08:18,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:08:18,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:08:18,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:08:18,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:08:18,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:08:18,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:08:18,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:08:18,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:08:18,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:08:18,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:08:18,741 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:08:18,746 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:08:18,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:08:18,749 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:08:18,750 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-21 22:08:18,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff94f5576/9377b853979448f5b1a6ca0e3b580eb9/FLAG82bfd3ea5 [2020-08-21 22:08:19,222 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:08:19,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-21 22:08:19,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff94f5576/9377b853979448f5b1a6ca0e3b580eb9/FLAG82bfd3ea5 [2020-08-21 22:08:19,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff94f5576/9377b853979448f5b1a6ca0e3b580eb9 [2020-08-21 22:08:19,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:08:19,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:08:19,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:08:19,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:08:19,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:08:19,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:08:19" (1/1) ... [2020-08-21 22:08:19,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dcb5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:19, skipping insertion in model container [2020-08-21 22:08:19,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:08:19" (1/1) ... [2020-08-21 22:08:19,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:08:19,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:08:19,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:08:19,885 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:08:19,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:08:19,923 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:08:19,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:19 WrapperNode [2020-08-21 22:08:19,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:08:19,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:08:19,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:08:19,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:08:20,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:19" (1/1) ... [2020-08-21 22:08:20,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:19" (1/1) ... [2020-08-21 22:08:20,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:19" (1/1) ... [2020-08-21 22:08:20,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:19" (1/1) ... [2020-08-21 22:08:20,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:19" (1/1) ... [2020-08-21 22:08:20,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:19" (1/1) ... [2020-08-21 22:08:20,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:19" (1/1) ... [2020-08-21 22:08:20,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:08:20,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:08:20,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:08:20,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:08:20,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:08:20,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:08:20,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:08:20,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 22:08:20,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:08:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:08:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 22:08:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 22:08:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:08:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:08:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:08:20,424 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:08:20,424 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 22:08:20,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:08:20 BoogieIcfgContainer [2020-08-21 22:08:20,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:08:20,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:08:20,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:08:20,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:08:20,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:08:19" (1/3) ... [2020-08-21 22:08:20,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccc52a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:08:20, skipping insertion in model container [2020-08-21 22:08:20,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:19" (2/3) ... [2020-08-21 22:08:20,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccc52a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:08:20, skipping insertion in model container [2020-08-21 22:08:20,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:08:20" (3/3) ... [2020-08-21 22:08:20,436 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-08-21 22:08:20,446 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:08:20,452 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:08:20,465 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:08:20,484 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:08:20,485 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:08:20,485 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:08:20,485 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:08:20,485 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:08:20,486 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:08:20,486 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:08:20,487 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:08:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 22:08:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 22:08:20,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:20,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:08:20,511 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:20,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:20,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times [2020-08-21 22:08:20,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:20,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96981011] [2020-08-21 22:08:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:20,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:20,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96981011] [2020-08-21 22:08:20,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:20,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 22:08:20,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243038902] [2020-08-21 22:08:20,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 22:08:20,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:20,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 22:08:20,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 22:08:20,651 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-21 22:08:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:20,676 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-08-21 22:08:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 22:08:20,677 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 22:08:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:20,686 INFO L225 Difference]: With dead ends: 38 [2020-08-21 22:08:20,686 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 22:08:20,690 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 [2020-08-21 22:08:20,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 22:08:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 22:08:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 22:08:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-08-21 22:08:20,731 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-08-21 22:08:20,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:20,732 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-08-21 22:08:20,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 22:08:20,732 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-08-21 22:08:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 22:08:20,733 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:20,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:08:20,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:08:20,734 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:20,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:20,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times [2020-08-21 22:08:20,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:20,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761316817] [2020-08-21 22:08:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:20,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:20,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761316817] [2020-08-21 22:08:20,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:20,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:08:20,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373572817] [2020-08-21 22:08:20,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:08:20,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:20,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:08:20,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:08:20,850 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states. [2020-08-21 22:08:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:20,954 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-08-21 22:08:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:08:20,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-21 22:08:20,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:20,959 INFO L225 Difference]: With dead ends: 28 [2020-08-21 22:08:20,959 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 22:08:20,960 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 [2020-08-21 22:08:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 22:08:20,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-08-21 22:08:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 22:08:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2020-08-21 22:08:20,969 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10 [2020-08-21 22:08:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:20,970 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2020-08-21 22:08:20,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:08:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2020-08-21 22:08:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:08:20,972 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:20,972 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] [2020-08-21 22:08:20,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:08:20,973 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:20,973 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times [2020-08-21 22:08:20,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:20,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083534033] [2020-08-21 22:08:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:21,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:21,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083534033] [2020-08-21 22:08:21,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:21,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:08:21,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717835154] [2020-08-21 22:08:21,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:08:21,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:21,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:08:21,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:08:21,317 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 10 states. [2020-08-21 22:08:22,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:22,360 INFO L93 Difference]: Finished difference Result 100 states and 182 transitions. [2020-08-21 22:08:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:08:22,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-08-21 22:08:22,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:22,363 INFO L225 Difference]: With dead ends: 100 [2020-08-21 22:08:22,363 INFO L226 Difference]: Without dead ends: 95 [2020-08-21 22:08:22,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:08:22,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-21 22:08:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2020-08-21 22:08:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 22:08:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 138 transitions. [2020-08-21 22:08:22,394 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 138 transitions. Word has length 21 [2020-08-21 22:08:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:22,394 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 138 transitions. [2020-08-21 22:08:22,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:08:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 138 transitions. [2020-08-21 22:08:22,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:08:22,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:22,396 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] [2020-08-21 22:08:22,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:08:22,397 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash 550117935, now seen corresponding path program 1 times [2020-08-21 22:08:22,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:22,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567922923] [2020-08-21 22:08:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:22,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:22,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567922923] [2020-08-21 22:08:22,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:22,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:08:22,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106924195] [2020-08-21 22:08:22,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:08:22,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:22,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:08:22,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:08:22,603 INFO L87 Difference]: Start difference. First operand 78 states and 138 transitions. Second operand 3 states. [2020-08-21 22:08:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:22,717 INFO L93 Difference]: Finished difference Result 110 states and 195 transitions. [2020-08-21 22:08:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:08:22,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:08:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:22,720 INFO L225 Difference]: With dead ends: 110 [2020-08-21 22:08:22,720 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 22:08:22,721 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 [2020-08-21 22:08:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 22:08:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-08-21 22:08:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 22:08:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-08-21 22:08:22,729 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2020-08-21 22:08:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:22,730 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-08-21 22:08:22,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:08:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-08-21 22:08:22,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:08:22,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:22,731 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] [2020-08-21 22:08:22,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:08:22,732 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:22,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:22,732 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times [2020-08-21 22:08:22,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:22,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695839303] [2020-08-21 22:08:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:22,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:22,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695839303] [2020-08-21 22:08:22,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:22,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:08:22,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573878457] [2020-08-21 22:08:22,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:08:22,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:22,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:08:22,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:08:22,980 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 13 states. [2020-08-21 22:08:23,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:23,147 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-08-21 22:08:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:08:23,149 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-08-21 22:08:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:23,150 INFO L225 Difference]: With dead ends: 51 [2020-08-21 22:08:23,151 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 22:08:23,152 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 [2020-08-21 22:08:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 22:08:23,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-21 22:08:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 22:08:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-21 22:08:23,165 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 21 [2020-08-21 22:08:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:23,166 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-21 22:08:23,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:08:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-21 22:08:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:08:23,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:23,167 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] [2020-08-21 22:08:23,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:08:23,167 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1016777103, now seen corresponding path program 1 times [2020-08-21 22:08:23,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:23,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383164376] [2020-08-21 22:08:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:23,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:23,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383164376] [2020-08-21 22:08:23,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:23,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:08:23,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196705849] [2020-08-21 22:08:23,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:08:23,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:23,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:08:23,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:08:23,249 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 3 states. [2020-08-21 22:08:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:23,313 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-08-21 22:08:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:08:23,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:08:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:23,315 INFO L225 Difference]: With dead ends: 61 [2020-08-21 22:08:23,315 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 22:08:23,316 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 [2020-08-21 22:08:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 22:08:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-08-21 22:08:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 22:08:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-08-21 22:08:23,322 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 21 [2020-08-21 22:08:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:23,322 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-08-21 22:08:23,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:08:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-08-21 22:08:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:08:23,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:23,323 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] [2020-08-21 22:08:23,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:08:23,324 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:23,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:23,325 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times [2020-08-21 22:08:23,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:23,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569839977] [2020-08-21 22:08:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 22:08:23,355 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 22:08:23,355 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 22:08:23,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:08:23,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:08:23 BoogieIcfgContainer [2020-08-21 22:08:23,376 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:08:23,379 INFO L168 Benchmark]: Toolchain (without parser) took 3717.96 ms. Allocated memory was 146.3 MB in the beginning and 245.9 MB in the end (delta: 99.6 MB). Free memory was 102.2 MB in the beginning and 177.5 MB in the end (delta: -75.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:08:23,380 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 22:08:23,381 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.34 ms. Allocated memory is still 146.3 MB. Free memory was 102.0 MB in the beginning and 91.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-21 22:08:23,382 INFO L168 Benchmark]: Boogie Preprocessor took 176.70 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 91.8 MB in the beginning and 181.7 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:08:23,383 INFO L168 Benchmark]: RCFGBuilder took 327.35 ms. Allocated memory is still 203.9 MB. Free memory was 181.7 MB in the beginning and 166.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-08-21 22:08:23,384 INFO L168 Benchmark]: TraceAbstraction took 2947.05 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 165.4 MB in the beginning and 177.5 MB in the end (delta: -12.1 MB). Peak memory consumption was 29.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:08:23,387 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.34 ms. Allocated memory is still 146.3 MB. Free memory was 102.0 MB in the beginning and 91.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 176.70 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 91.8 MB in the beginning and 181.7 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 327.35 ms. Allocated memory is still 203.9 MB. Free memory was 181.7 MB in the beginning and 166.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2947.05 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 165.4 MB in the beginning and 177.5 MB in the end (delta: -12.1 MB). Peak memory consumption was 29.8 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: 2.8s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 31 SDslu, 60 SDs, 0 SdLazy, 1106 SolverSat, 209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=3, 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, 6 MinimizatonAttempts, 28 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 7076 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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...