/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options 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-c90d42b [2020-09-24 15:56:36,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:56:36,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:56:36,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:56:36,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:56:36,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:56:36,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:56:36,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:56:36,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:56:36,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:56:36,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:56:36,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:56:36,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:56:36,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:56:36,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:56:36,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:56:36,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:56:36,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:56:36,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:56:36,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:56:36,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:56:36,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:56:36,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:56:36,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:56:36,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 15:56:36,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 15:56:36,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 15:56:36,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 15:56:36,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 15:56:36,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 15:56:36,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 15:56:36,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 15:56:36,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 15:56:36,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 15:56:36,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 15:56:36,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 15:56:36,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 15:56:36,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 15:56:36,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:56:36,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:56:36,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:56:36,248 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 [2020-09-24 15:56:36,293 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:56:36,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:56:36,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:56:36,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:56:36,296 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:56:36,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:56:36,297 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:56:36,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:56:36,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:56:36,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:56:36,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:56:36,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:56:36,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:56:36,299 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:56:36,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:56:36,300 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:56:36,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:56:36,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:56:36,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:56:36,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:56:36,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:56:36,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:56:36,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:56:36,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:56:36,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:56:36,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:56:36,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:56:36,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:56:36,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:56:36,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;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; [2020-09-24 15:56:36,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:56:36,756 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:56:36,762 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:56:36,765 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:56:36,766 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:56:36,767 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-24 15:56:36,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f4bb44e4/4a7b3fef6b6a4e4e9fa16bf44f56fc50/FLAGe5952870a [2020-09-24 15:56:37,380 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:56:37,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-24 15:56:37,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f4bb44e4/4a7b3fef6b6a4e4e9fa16bf44f56fc50/FLAGe5952870a [2020-09-24 15:56:37,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f4bb44e4/4a7b3fef6b6a4e4e9fa16bf44f56fc50 [2020-09-24 15:56:37,755 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:56:37,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:56:37,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:56:37,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:56:37,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:56:37,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:56:37" (1/1) ... [2020-09-24 15:56:37,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:37, skipping insertion in model container [2020-09-24 15:56:37,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:56:37" (1/1) ... [2020-09-24 15:56:37,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:56:37,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:56:38,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:56:38,026 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:56:38,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:56:38,070 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:56:38,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38 WrapperNode [2020-09-24 15:56:38,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:56:38,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:56:38,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:56:38,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:56:38,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:56:38,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:56:38,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:56:38,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:56:38,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (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 [2020-09-24 15:56:38,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:56:38,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:56:38,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 15:56:38,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:56:38,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:56:38,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 15:56:38,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:56:38,264 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:56:38,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:56:38,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:56:38,558 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:56:38,558 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:56:38,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:56:38 BoogieIcfgContainer [2020-09-24 15:56:38,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:56:38,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:56:38,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:56:38,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:56:38,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:56:37" (1/3) ... [2020-09-24 15:56:38,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54944f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:56:38, skipping insertion in model container [2020-09-24 15:56:38,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (2/3) ... [2020-09-24 15:56:38,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54944f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:56:38, skipping insertion in model container [2020-09-24 15:56:38,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:56:38" (3/3) ... [2020-09-24 15:56:38,574 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-09-24 15:56:38,589 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:56:38,601 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:56:38,627 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:56:38,668 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:56:38,668 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:56:38,668 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:56:38,668 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:56:38,669 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:56:38,669 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:56:38,669 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:56:38,669 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:56:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-24 15:56:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 15:56:38,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:38,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:38,721 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash -7732671, now seen corresponding path program 1 times [2020-09-24 15:56:38,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:38,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61443046] [2020-09-24 15:56:38,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:38,858 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:38,859 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:38,859 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:38,859 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:38,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 15:56:38,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:38,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 15:56:38,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:38,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:38,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 15:56:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:38,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:38,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:38,891 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:38,892 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:38,892 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:38,892 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:38,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 15:56:38,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:38,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:38,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:38,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:38,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:56:38,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61443046] [2020-09-24 15:56:38,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:56:38,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 15:56:38,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539843614] [2020-09-24 15:56:38,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 15:56:38,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:38,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 15:56:38,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 15:56:38,931 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2020-09-24 15:56:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:38,962 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-09-24 15:56:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 15:56:38,963 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-24 15:56:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:38,972 INFO L225 Difference]: With dead ends: 62 [2020-09-24 15:56:38,972 INFO L226 Difference]: Without dead ends: 45 [2020-09-24 15:56:38,976 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 [2020-09-24 15:56:38,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-24 15:56:39,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-24 15:56:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 15:56:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-09-24 15:56:39,023 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 12 [2020-09-24 15:56:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:39,024 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-09-24 15:56:39,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 15:56:39,024 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-09-24 15:56:39,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 15:56:39,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:39,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:39,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:56:39,026 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:39,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:39,027 INFO L82 PathProgramCache]: Analyzing trace with hash -87155477, now seen corresponding path program 1 times [2020-09-24 15:56:39,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:39,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124389439] [2020-09-24 15:56:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:39,077 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:39,077 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:39,078 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:39,078 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:39,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 15:56:39,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:39,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 15:56:39,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:39,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 15:56:39,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 15:56:39,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 15:56:39,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:39,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:39,160 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:39,161 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:39,161 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:39,161 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:39,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 15:56:39,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:39,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:39,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:39,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:56:39,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124389439] [2020-09-24 15:56:39,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:56:39,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 15:56:39,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325361762] [2020-09-24 15:56:39,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 15:56:39,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:39,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 15:56:39,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 15:56:39,176 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 3 states. [2020-09-24 15:56:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:39,270 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-09-24 15:56:39,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 15:56:39,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-24 15:56:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:39,272 INFO L225 Difference]: With dead ends: 55 [2020-09-24 15:56:39,273 INFO L226 Difference]: Without dead ends: 50 [2020-09-24 15:56:39,274 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 [2020-09-24 15:56:39,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-24 15:56:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-09-24 15:56:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-24 15:56:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-09-24 15:56:39,283 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 12 [2020-09-24 15:56:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:39,284 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-09-24 15:56:39,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 15:56:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-09-24 15:56:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 15:56:39,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:39,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:39,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:56:39,286 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:39,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1575516068, now seen corresponding path program 1 times [2020-09-24 15:56:39,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:39,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106693260] [2020-09-24 15:56:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:39,345 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:39,345 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:39,346 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:39,346 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:39,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 15:56:39,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:39,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 15:56:39,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:39,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 15:56:39,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 15:56:39,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 15:56:39,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:39,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:39,476 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:39,476 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:39,479 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:39,479 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:39,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 15:56:39,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:39,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 15:56:39,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:39,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:39,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:39,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:39,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:56:39,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106693260] [2020-09-24 15:56:39,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:56:39,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 15:56:39,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944706120] [2020-09-24 15:56:39,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 15:56:39,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:39,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 15:56:39,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 15:56:39,499 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 3 states. [2020-09-24 15:56:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:39,628 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2020-09-24 15:56:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 15:56:39,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-24 15:56:39,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:39,632 INFO L225 Difference]: With dead ends: 96 [2020-09-24 15:56:39,632 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 15:56:39,633 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 [2020-09-24 15:56:39,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 15:56:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-24 15:56:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 15:56:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-09-24 15:56:39,645 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 33 [2020-09-24 15:56:39,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:39,646 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-09-24 15:56:39,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 15:56:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-09-24 15:56:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 15:56:39,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:39,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:39,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:56:39,651 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash 132907260, now seen corresponding path program 1 times [2020-09-24 15:56:39,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:39,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582770227] [2020-09-24 15:56:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 15:56:39,747 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 15:56:39,748 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 15:56:39,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:56:39,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:56:39 BoogieIcfgContainer [2020-09-24 15:56:39,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:56:39,777 INFO L168 Benchmark]: Toolchain (without parser) took 2018.42 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 104.5 MB in the beginning and 100.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 67.1 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:39,778 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 15:56:39,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.75 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 93.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:39,780 INFO L168 Benchmark]: Boogie Preprocessor took 119.46 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.8 MB in the beginning and 182.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:39,780 INFO L168 Benchmark]: RCFGBuilder took 371.65 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 164.9 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:39,781 INFO L168 Benchmark]: TraceAbstraction took 1208.24 ms. Allocated memory is still 203.9 MB. Free memory was 164.9 MB in the beginning and 100.3 MB in the end (delta: 64.7 MB). Peak memory consumption was 64.7 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:39,785 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.75 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 93.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.46 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.8 MB in the beginning and 182.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.65 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 164.9 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1208.24 ms. Allocated memory is still 203.9 MB. Free memory was 164.9 MB in the beginning and 100.3 MB in the end (delta: 64.7 MB). Peak memory consumption was 64.7 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, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 160 SDtfs, 24 SDslu, 53 SDs, 0 SdLazy, 47 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred 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, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 3896 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 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...