/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/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:10:19,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:10:19,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:10:19,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:10:19,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:10:19,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:10:19,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:10:19,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:10:19,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:10:19,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:10:19,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:10:19,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:10:19,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:10:19,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:10:19,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:10:19,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:10:19,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:10:19,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:10:19,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:10:19,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:10:19,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:10:19,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:10:19,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:10:19,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:10:19,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:10:19,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:10:19,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:10:19,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:10:19,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:10:19,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 16:10:19,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:10:19,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:10:19,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:10:19,672 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 16:10:19,719 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:10:19,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:10:19,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:10:19,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:10:19,725 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:10:19,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:10:19,726 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:10:19,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:10:19,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:10:19,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:10:19,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:10:19,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:10:19,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:10:19,727 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:10:19,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:10:19,727 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:10:19,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:10:19,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:10:19,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:10:19,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:10:19,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:10:19,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:10:19,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:10:19,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:10:19,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:10:19,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:10:19,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:10:19,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:10:19,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:10:19,732 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 16:10:20,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:10:20,190 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:10:20,195 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:10:20,197 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:10:20,198 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:10:20,199 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-24 16:10:20,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/089c97337/e802bf1574cf429cbf2fd315ca79239b/FLAGccaa2e3ca [2020-09-24 16:10:20,895 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:10:20,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-24 16:10:20,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/089c97337/e802bf1574cf429cbf2fd315ca79239b/FLAGccaa2e3ca [2020-09-24 16:10:21,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/089c97337/e802bf1574cf429cbf2fd315ca79239b [2020-09-24 16:10:21,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:10:21,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:10:21,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:21,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:10:21,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:10:21,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:21" (1/1) ... [2020-09-24 16:10:21,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e2873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:21, skipping insertion in model container [2020-09-24 16:10:21,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:21" (1/1) ... [2020-09-24 16:10:21,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:10:21,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:10:21,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:21,514 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:10:21,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:21,546 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:10:21,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:21 WrapperNode [2020-09-24 16:10:21,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:21,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:10:21,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:10:21,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:10:21,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:21" (1/1) ... [2020-09-24 16:10:21,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:21" (1/1) ... [2020-09-24 16:10:21,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:21" (1/1) ... [2020-09-24 16:10:21,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:21" (1/1) ... [2020-09-24 16:10:21,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:21" (1/1) ... [2020-09-24 16:10:21,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:21" (1/1) ... [2020-09-24 16:10:21,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:21" (1/1) ... [2020-09-24 16:10:21,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:10:21,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:10:21,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:10:21,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:10:21,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:21" (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 16:10:21,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:10:21,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:10:21,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:10:21,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:10:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:10:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:10:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 16:10:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:10:21,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:10:21,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:10:21,943 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:10:21,943 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 16:10:21,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:21 BoogieIcfgContainer [2020-09-24 16:10:21,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:10:21,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:10:21,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:10:21,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:10:21,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:10:21" (1/3) ... [2020-09-24 16:10:21,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155460f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:21, skipping insertion in model container [2020-09-24 16:10:21,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:21" (2/3) ... [2020-09-24 16:10:21,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155460f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:21, skipping insertion in model container [2020-09-24 16:10:21,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:21" (3/3) ... [2020-09-24 16:10:21,979 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-09-24 16:10:22,013 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:10:22,023 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:10:22,062 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:10:22,096 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:10:22,096 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:10:22,096 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:10:22,096 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:10:22,096 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:10:22,097 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:10:22,097 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:10:22,097 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:10:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-24 16:10:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 16:10:22,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:22,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:22,124 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:22,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:22,132 INFO L82 PathProgramCache]: Analyzing trace with hash -290415040, now seen corresponding path program 1 times [2020-09-24 16:10:22,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:22,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132649004] [2020-09-24 16:10:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:22,262 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:22,262 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:22,262 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:22,263 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:22,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 16:10:22,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:22,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 16:10:22,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:22,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:22,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:22,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:22,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:22,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:22,302 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:22,302 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:22,303 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:22,303 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:22,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:22,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:22,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:22,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:22,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:22,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:22,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:22,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:22,311 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 16:10:22,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132649004] [2020-09-24 16:10:22,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:22,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 16:10:22,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920595735] [2020-09-24 16:10:22,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 16:10:22,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:22,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 16:10:22,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 16:10:22,344 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-09-24 16:10:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:22,375 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-09-24 16:10:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 16:10:22,376 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-24 16:10:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:22,387 INFO L225 Difference]: With dead ends: 38 [2020-09-24 16:10:22,388 INFO L226 Difference]: Without dead ends: 21 [2020-09-24 16:10:22,392 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 16:10:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-24 16:10:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-24 16:10:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-24 16:10:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-24 16:10:22,436 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2020-09-24 16:10:22,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:22,437 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-24 16:10:22,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 16:10:22,437 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-24 16:10:22,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 16:10:22,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:22,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:22,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:10:22,439 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash -304267855, now seen corresponding path program 1 times [2020-09-24 16:10:22,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:22,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894744350] [2020-09-24 16:10:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:22,493 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:22,494 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:22,494 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:22,494 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:22,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 16:10:22,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:22,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 16:10:22,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:10:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 16:10:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 16:10:22,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:22,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:22,575 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:22,575 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:22,575 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:22,576 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:22,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:22,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:22,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:22,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:22,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:22,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:22,582 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 16:10:22,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894744350] [2020-09-24 16:10:22,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:22,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:10:22,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023432199] [2020-09-24 16:10:22,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:10:22,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:22,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:10:22,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:10:22,587 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-24 16:10:22,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:22,644 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-24 16:10:22,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:10:22,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-24 16:10:22,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:22,647 INFO L225 Difference]: With dead ends: 28 [2020-09-24 16:10:22,647 INFO L226 Difference]: Without dead ends: 23 [2020-09-24 16:10:22,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:10:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-24 16:10:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-24 16:10:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 16:10:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-24 16:10:22,655 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-09-24 16:10:22,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:22,655 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-24 16:10:22,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:10:22,656 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-24 16:10:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 16:10:22,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:22,657 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] [2020-09-24 16:10:22,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:10:22,657 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:22,658 INFO L82 PathProgramCache]: Analyzing trace with hash -887516915, now seen corresponding path program 1 times [2020-09-24 16:10:22,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:22,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496620938] [2020-09-24 16:10:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:22,770 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:22,770 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:22,771 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:22,771 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:22,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 16:10:22,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:22,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-09-24 16:10:22,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:22,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:10:22,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 16:10:22,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 16:10:22,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 16:10:23,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:23,110 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:23,110 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:23,110 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:23,111 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:23,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:23,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:23,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:23,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:23,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:23,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:23,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:23,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496620938] [2020-09-24 16:10:23,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:23,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 16:10:23,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173696316] [2020-09-24 16:10:23,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 16:10:23,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:23,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 16:10:23,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:10:23,123 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-09-24 16:10:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:23,404 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-09-24 16:10:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:10:23,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-24 16:10:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:23,406 INFO L225 Difference]: With dead ends: 35 [2020-09-24 16:10:23,407 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 16:10:23,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:10:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 16:10:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-24 16:10:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 16:10:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-24 16:10:23,414 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-09-24 16:10:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:23,415 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-24 16:10:23,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 16:10:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-24 16:10:23,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 16:10:23,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:23,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:23,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:10:23,417 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:23,417 INFO L82 PathProgramCache]: Analyzing trace with hash -507920327, now seen corresponding path program 1 times [2020-09-24 16:10:23,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:23,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104838077] [2020-09-24 16:10:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:23,433 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:23,433 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:23,434 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:23,434 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:23,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 16:10:23,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:23,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:23,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 16:10:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:10:23,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:23,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:23,454 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:23,454 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:23,454 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:23,455 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:23,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:23,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:23,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:23,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:23,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:23,459 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 16:10:23,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104838077] [2020-09-24 16:10:23,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:23,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 16:10:23,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639301281] [2020-09-24 16:10:23,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 16:10:23,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:23,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 16:10:23,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:10:23,462 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 3 states. [2020-09-24 16:10:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:23,483 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-09-24 16:10:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 16:10:23,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-24 16:10:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:23,485 INFO L225 Difference]: With dead ends: 40 [2020-09-24 16:10:23,485 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 16:10:23,486 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 16:10:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 16:10:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 16:10:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 16:10:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-24 16:10:23,493 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-09-24 16:10:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:23,493 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-24 16:10:23,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 16:10:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-24 16:10:23,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 16:10:23,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:23,494 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:23,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:10:23,495 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159721, now seen corresponding path program 2 times [2020-09-24 16:10:23,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:23,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281071012] [2020-09-24 16:10:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:23,579 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:23,580 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:23,583 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:23,584 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:23,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 16:10:23,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:23,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 16:10:23,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:23,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 16:10:23,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 16:10:23,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 16:10:23,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:23,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:23,996 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:23,997 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:23,997 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:23,997 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:23,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:23,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:23,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:23,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:23,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:23,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:23,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:23,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:24,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281071012] [2020-09-24 16:10:24,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:24,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 16:10:24,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773826972] [2020-09-24 16:10:24,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 16:10:24,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 16:10:24,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 16:10:24,006 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-24 16:10:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:24,434 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-24 16:10:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 16:10:24,434 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-24 16:10:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:24,436 INFO L225 Difference]: With dead ends: 42 [2020-09-24 16:10:24,436 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 16:10:24,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-24 16:10:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 16:10:24,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-09-24 16:10:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 16:10:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-09-24 16:10:24,443 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-09-24 16:10:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:24,444 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-09-24 16:10:24,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 16:10:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-09-24 16:10:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 16:10:24,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:24,445 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:24,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:10:24,446 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1064709469, now seen corresponding path program 1 times [2020-09-24 16:10:24,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:24,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882009049] [2020-09-24 16:10:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:24,463 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:24,464 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:24,464 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:24,464 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:24,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 16:10:24,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:24,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 16:10:24,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:24,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:10:24,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 16:10:24,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 16:10:24,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:24,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:24,496 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:24,496 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:24,496 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:24,497 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:24,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:24,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:24,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:24,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:24,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:24,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:24,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:24,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:24,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882009049] [2020-09-24 16:10:24,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:24,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 16:10:24,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15899073] [2020-09-24 16:10:24,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:10:24,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:24,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:10:24,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:10:24,509 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-09-24 16:10:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:24,555 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-24 16:10:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:10:24,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-24 16:10:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:24,557 INFO L225 Difference]: With dead ends: 50 [2020-09-24 16:10:24,557 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 16:10:24,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:10:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 16:10:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-24 16:10:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 16:10:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-24 16:10:24,564 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-09-24 16:10:24,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:24,564 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-24 16:10:24,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:10:24,564 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-24 16:10:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 16:10:24,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:24,565 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:24,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:10:24,566 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:24,566 INFO L82 PathProgramCache]: Analyzing trace with hash -674418815, now seen corresponding path program 2 times [2020-09-24 16:10:24,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:24,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482488505] [2020-09-24 16:10:24,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:24,587 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:24,587 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:24,587 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:24,587 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:24,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 16:10:24,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:24,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 16:10:24,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:24,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:10:24,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 16:10:24,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 16:10:24,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:24,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:24,631 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:24,631 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:24,631 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:24,631 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:24,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:24,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:24,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:24,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:24,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:24,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:24,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:24,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:24,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482488505] [2020-09-24 16:10:24,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:24,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 16:10:24,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694242370] [2020-09-24 16:10:24,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:10:24,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:24,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:10:24,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:10:24,639 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 7 states. [2020-09-24 16:10:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:24,717 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-09-24 16:10:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 16:10:24,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-24 16:10:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:24,718 INFO L225 Difference]: With dead ends: 56 [2020-09-24 16:10:24,719 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 16:10:24,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:10:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 16:10:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 16:10:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 16:10:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-24 16:10:24,726 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-09-24 16:10:24,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:24,726 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-24 16:10:24,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:10:24,726 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-24 16:10:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 16:10:24,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:24,729 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:24,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:10:24,730 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:24,730 INFO L82 PathProgramCache]: Analyzing trace with hash -809826651, now seen corresponding path program 3 times [2020-09-24 16:10:24,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:24,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917858256] [2020-09-24 16:10:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 16:10:24,747 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 16:10:24,748 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 16:10:24,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:10:24,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 04:10:24 BoogieIcfgContainer [2020-09-24 16:10:24,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 16:10:24,777 INFO L168 Benchmark]: Toolchain (without parser) took 3543.73 ms. Allocated memory was 141.6 MB in the beginning and 243.3 MB in the end (delta: 101.7 MB). Free memory was 103.2 MB in the beginning and 171.4 MB in the end (delta: -68.2 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:24,778 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 16:10:24,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.53 ms. Allocated memory is still 141.6 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:24,779 INFO L168 Benchmark]: Boogie Preprocessor took 111.22 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 183.6 MB in the end (delta: -90.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:24,780 INFO L168 Benchmark]: RCFGBuilder took 291.11 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 171.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:24,781 INFO L168 Benchmark]: TraceAbstraction took 2806.67 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 171.2 MB in the beginning and 171.4 MB in the end (delta: -187.7 kB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:24,785 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.53 ms. Allocated memory is still 141.6 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.22 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 183.6 MB in the end (delta: -90.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.11 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 171.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2806.67 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 171.2 MB in the beginning and 171.4 MB in the end (delta: -187.7 kB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-10 [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 131 SDtfs, 35 SDslu, 379 SDs, 0 SdLazy, 310 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, 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, 7 MinimizatonAttempts, 14 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 148 ConstructedInterpolants, 0 QuantifiedInterpolants, 13064 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 15/39 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...