/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:33:18,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:33:18,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:33:18,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:33:18,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:33:18,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:33:18,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:33:18,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:33:18,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:33:18,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:33:18,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:33:18,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:33:18,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:33:18,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:33:18,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:33:18,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:33:18,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:33:18,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:33:18,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:33:18,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:33:18,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 12:33:18,390 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:33:18,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:33:18,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:33:18,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:33:18,393 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:33:18,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:33:18,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:33:18,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:33:18,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:33:18,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:33:18,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:33:18,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:33:18,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:33:18,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:33:18,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:33:18,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:33:18,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:33:18,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:33:18,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:33:18,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:33:18,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:33:18,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:33:18,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:33:18,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:33:18,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:33:18,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:33:18,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:33:18,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:33:18,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:33:18,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:33:18,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:33:18,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:33:18,687 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:33:18,687 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:33:18,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2021-05-02 12:33:18,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e0e3040/0db2bbf97efe451a80ca550314892394/FLAGd749a17f9 [2021-05-02 12:33:19,066 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:33:19,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2021-05-02 12:33:19,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e0e3040/0db2bbf97efe451a80ca550314892394/FLAGd749a17f9 [2021-05-02 12:33:19,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e0e3040/0db2bbf97efe451a80ca550314892394 [2021-05-02 12:33:19,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:33:19,087 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:33:19,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:33:19,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:33:19,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:33:19,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:33:19" (1/1) ... [2021-05-02 12:33:19,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b49d4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:19, skipping insertion in model container [2021-05-02 12:33:19,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:33:19" (1/1) ... [2021-05-02 12:33:19,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:33:19,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:33:19,236 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i[893,906] [2021-05-02 12:33:19,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:33:19,251 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:33:19,269 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i[893,906] [2021-05-02 12:33:19,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:33:19,301 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:33:19,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:19 WrapperNode [2021-05-02 12:33:19,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:33:19,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:33:19,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:33:19,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:33:19,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:19" (1/1) ... [2021-05-02 12:33:19,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:19" (1/1) ... [2021-05-02 12:33:19,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:19" (1/1) ... [2021-05-02 12:33:19,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:19" (1/1) ... [2021-05-02 12:33:19,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:19" (1/1) ... [2021-05-02 12:33:19,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:19" (1/1) ... [2021-05-02 12:33:19,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:19" (1/1) ... [2021-05-02 12:33:19,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:33:19,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:33:19,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:33:19,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:33:19,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-05-02 12:33:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:33:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:33:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:33:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:33:19,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:33:19,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:33:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:33:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:33:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:33:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:33:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:33:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:33:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:33:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:33:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:33:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:33:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:33:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:33:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:33:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:33:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:33:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:33:19,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:33:19,661 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 12:33:19,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:33:19 BoogieIcfgContainer [2021-05-02 12:33:19,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:33:19,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:33:19,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:33:19,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:33:19,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:33:19" (1/3) ... [2021-05-02 12:33:19,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2047e13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:33:19, skipping insertion in model container [2021-05-02 12:33:19,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:19" (2/3) ... [2021-05-02 12:33:19,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2047e13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:33:19, skipping insertion in model container [2021-05-02 12:33:19,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:33:19" (3/3) ... [2021-05-02 12:33:19,666 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2021-05-02 12:33:19,683 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:33:19,685 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:33:19,696 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:33:19,718 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:33:19,718 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:33:19,718 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:33:19,719 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:33:19,719 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:33:19,719 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:33:19,719 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:33:19,719 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:33:19,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:33:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 12:33:19,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:19,731 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:19,731 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:19,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:19,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2111647297, now seen corresponding path program 1 times [2021-05-02 12:33:19,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:19,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258108194] [2021-05-02 12:33:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:19,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:20,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:20,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258108194] [2021-05-02 12:33:20,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258108194] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:20,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:33:20,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 12:33:20,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759111871] [2021-05-02 12:33:20,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:33:20,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:20,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:33:20,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:33:20,022 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:20,375 INFO L93 Difference]: Finished difference Result 67 states and 98 transitions. [2021-05-02 12:33:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:33:20,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 12:33:20,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:20,381 INFO L225 Difference]: With dead ends: 67 [2021-05-02 12:33:20,381 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 12:33:20,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:33:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 12:33:20,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-05-02 12:33:20,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 12:33:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-05-02 12:33:20,406 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 18 [2021-05-02 12:33:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:20,406 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-05-02 12:33:20,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-05-02 12:33:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 12:33:20,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:20,407 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:20,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:33:20,408 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:20,408 INFO L82 PathProgramCache]: Analyzing trace with hash 192634036, now seen corresponding path program 1 times [2021-05-02 12:33:20,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:20,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485355504] [2021-05-02 12:33:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:20,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:20,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485355504] [2021-05-02 12:33:20,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485355504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:20,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962464239] [2021-05-02 12:33:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:33:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:20,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:20,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962464239] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:20,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:33:20,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-05-02 12:33:20,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528469685] [2021-05-02 12:33:20,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:33:20,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:20,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:33:20,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:33:20,817 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:20,887 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-05-02 12:33:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:33:20,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 12:33:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:20,893 INFO L225 Difference]: With dead ends: 49 [2021-05-02 12:33:20,894 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 12:33:20,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:33:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 12:33:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2021-05-02 12:33:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:33:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-05-02 12:33:20,908 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2021-05-02 12:33:20,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:20,922 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-05-02 12:33:20,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-05-02 12:33:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 12:33:20,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:20,923 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:21,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 12:33:21,140 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:21,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:21,141 INFO L82 PathProgramCache]: Analyzing trace with hash -450009679, now seen corresponding path program 1 times [2021-05-02 12:33:21,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:21,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952081864] [2021-05-02 12:33:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:21,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:21,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 12:33:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:21,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:21,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952081864] [2021-05-02 12:33:21,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952081864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:21,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823878377] [2021-05-02 12:33:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:21,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 12:33:21,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:21,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 12:33:21,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823878377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:21,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:33:21,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-05-02 12:33:21,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382521769] [2021-05-02 12:33:21,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:33:21,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:21,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:33:21,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:33:21,409 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:33:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:21,419 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-05-02 12:33:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:33:21,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-05-02 12:33:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:21,421 INFO L225 Difference]: With dead ends: 52 [2021-05-02 12:33:21,421 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 12:33:21,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:33:21,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 12:33:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 12:33:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:33:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 12:33:21,425 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2021-05-02 12:33:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:21,425 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 12:33:21,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:33:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 12:33:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 12:33:21,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:21,426 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:21,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:21,641 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:21,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1971686684, now seen corresponding path program 1 times [2021-05-02 12:33:21,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:21,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516165231] [2021-05-02 12:33:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:21,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:21,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 12:33:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:21,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:21,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516165231] [2021-05-02 12:33:21,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516165231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:21,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577088414] [2021-05-02 12:33:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:21,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 12:33:21,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:21,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:21,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:21,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:21,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:21,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:21,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:21,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:21,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:21,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577088414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:21,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:21,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-02 12:33:21,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729385228] [2021-05-02 12:33:21,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 12:33:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:21,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 12:33:21,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:33:21,883 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:33:22,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:22,282 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-05-02 12:33:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 12:33:22,282 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 12:33:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:22,283 INFO L225 Difference]: With dead ends: 66 [2021-05-02 12:33:22,283 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 12:33:22,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:33:22,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 12:33:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-05-02 12:33:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 12:33:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-05-02 12:33:22,289 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2021-05-02 12:33:22,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:22,289 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-05-02 12:33:22,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:33:22,289 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-05-02 12:33:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 12:33:22,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:22,290 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:22,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:22,505 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:22,505 INFO L82 PathProgramCache]: Analyzing trace with hash -186544382, now seen corresponding path program 1 times [2021-05-02 12:33:22,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:22,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974942125] [2021-05-02 12:33:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:22,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:22,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 12:33:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 12:33:22,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:22,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974942125] [2021-05-02 12:33:22,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974942125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:22,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700337521] [2021-05-02 12:33:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:22,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 12:33:22,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:22,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:22,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:22,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:22,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 12:33:22,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700337521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:22,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:33:22,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-05-02 12:33:22,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519473306] [2021-05-02 12:33:22,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:33:22,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:22,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:33:22,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:33:22,742 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:33:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:22,819 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2021-05-02 12:33:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 12:33:22,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2021-05-02 12:33:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:22,820 INFO L225 Difference]: With dead ends: 68 [2021-05-02 12:33:22,820 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 12:33:22,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:33:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 12:33:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-05-02 12:33:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 12:33:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-02 12:33:22,834 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2021-05-02 12:33:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:22,834 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-02 12:33:22,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:33:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-02 12:33:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 12:33:22,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:22,838 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:23,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:23,053 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash 50284442, now seen corresponding path program 2 times [2021-05-02 12:33:23,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:23,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742155595] [2021-05-02 12:33:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:23,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:23,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 12:33:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:23,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 12:33:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 12:33:23,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:23,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742155595] [2021-05-02 12:33:23,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742155595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:23,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534050839] [2021-05-02 12:33:23,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:23,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 12:33:23,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:33:23,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 12:33:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:23,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:23,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:23,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:23,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:23,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:23,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:23,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:23,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 12:33:23,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534050839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:23,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:23,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-05-02 12:33:23,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186092001] [2021-05-02 12:33:23,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 12:33:23,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:23,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 12:33:23,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:33:23,313 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 12:33:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:23,624 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-05-02 12:33:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 12:33:23,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 12:33:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:23,626 INFO L225 Difference]: With dead ends: 68 [2021-05-02 12:33:23,626 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:33:23,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:33:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:33:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:33:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 12:33:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:33:23,627 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-02 12:33:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:23,627 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:33:23,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 12:33:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:33:23,628 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:33:23,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:23,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:33:24,152 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 12:33:24,152 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 12:33:24,152 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 12:33:24,152 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:33:24,152 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__BLAST_NONDET~0 |old(~__BLAST_NONDET~0)|) (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 12:33:24,152 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:33:24,152 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:33:24,152 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 12:33:24,152 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:33:24,152 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:33:24,152 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-02 12:33:24,152 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:24,152 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0))) (let ((.cse0 (<= .cse2 main_~j~0)) (.cse1 (< main_~i~0 main_~n~0))) (or (and .cse0 (<= 1 main_~i~0) .cse1) (and .cse0 (<= main_~j~0 .cse2) (<= 0 main_~i~0) .cse1)))) [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point L31(line 31) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 25 40) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L194 CegarLoopUtils]: At program point L36-2(lines 36 37) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (< main_~j~0 (* 3 main_~i~0)) (< main_~i~0 main_~n~0)) [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point L32(line 32) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0))) (and (< (+ main_~k~0 1) .cse0) (<= (* 2 main_~i~0) main_~j~0) (< main_~j~0 .cse0) (< main_~i~0 main_~n~0))) [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point L37-1(lines 36 37) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point L33(line 33) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point L33-1(line 33) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 25 40) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L201 CegarLoopUtils]: At program point L38(lines 25 40) the Hoare annotation is: true [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point L34-2(lines 34 37) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (<= 0 main_~i~0))) (or (= main_~i~0 0) (and .cse0 (<= 2 main_~n~0)) (and (<= main_~j~0 (* 2 main_~i~0)) .cse0 (<= main_~i~0 1)))) [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point L30(line 30) no Hoare annotation was computed. [2021-05-02 12:33:24,153 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 25 40) the Hoare annotation is: true [2021-05-02 12:33:24,153 INFO L198 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:33:24,154 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-02 12:33:24,154 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:33:24,154 INFO L198 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-05-02 12:33:24,154 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-05-02 12:33:24,154 INFO L198 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-05-02 12:33:24,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:33:24 BoogieIcfgContainer [2021-05-02 12:33:24,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:33:24,164 INFO L168 Benchmark]: Toolchain (without parser) took 5076.49 ms. Allocated memory was 220.2 MB in the beginning and 288.4 MB in the end (delta: 68.2 MB). Free memory was 184.6 MB in the beginning and 204.3 MB in the end (delta: -19.7 MB). Peak memory consumption was 150.3 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:24,164 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 220.2 MB. Free memory was 201.2 MB in the beginning and 201.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:33:24,164 INFO L168 Benchmark]: CACSL2BoogieTranslator took 205.43 ms. Allocated memory is still 220.2 MB. Free memory was 184.4 MB in the beginning and 202.3 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:24,164 INFO L168 Benchmark]: Boogie Preprocessor took 34.60 ms. Allocated memory is still 220.2 MB. Free memory was 201.7 MB in the beginning and 200.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:24,164 INFO L168 Benchmark]: RCFGBuilder took 323.74 ms. Allocated memory is still 220.2 MB. Free memory was 200.2 MB in the beginning and 183.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:24,164 INFO L168 Benchmark]: TraceAbstraction took 4500.50 ms. Allocated memory was 220.2 MB in the beginning and 288.4 MB in the end (delta: 68.2 MB). Free memory was 183.9 MB in the beginning and 204.3 MB in the end (delta: -20.4 MB). Peak memory consumption was 151.0 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:24,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 220.2 MB. Free memory was 201.2 MB in the beginning and 201.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 205.43 ms. Allocated memory is still 220.2 MB. Free memory was 184.4 MB in the beginning and 202.3 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.60 ms. Allocated memory is still 220.2 MB. Free memory was 201.7 MB in the beginning and 200.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 323.74 ms. Allocated memory is still 220.2 MB. Free memory was 200.2 MB in the beginning and 183.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4500.50 ms. Allocated memory was 220.2 MB in the beginning and 288.4 MB in the end (delta: 68.2 MB). Free memory was 183.9 MB in the beginning and 204.3 MB in the end (delta: -20.4 MB). Peak memory consumption was 151.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4116.1ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 9.5ms, AutomataDifference: 1257.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 318.4ms, InitialAbstractionConstructionTime: 6.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 123 SDtfs, 207 SDslu, 237 SDs, 0 SdLazy, 589 SolverSat, 93 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 369.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1170.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 51.7ms AutomataMinimizationTime, 6 MinimizatonAttempts, 31 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 10 LocationsWithAnnotation, 23 PreInvPairs, 40 NumberOfFragments, 121 HoareAnnotationTreeSize, 23 FomulaSimplifications, 1866 FormulaSimplificationTreeSizeReduction, 81.2ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 1194 FormulaSimplificationTreeSizeReductionInter, 230.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 57.6ms SsaConstructionTime, 151.7ms SatisfiabilityAnalysisTime, 1283.4ms InterpolantComputationTime, 316 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 305 ConstructedInterpolants, 0 QuantifiedInterpolants, 985 SizeOfPredicates, 11 NumberOfNonLiveVariables, 576 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 84/112 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (2 * i <= j && j < 3 * i) && i < n - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (i == 0 || (0 <= i && 2 <= n)) || ((j <= 2 * i && 0 <= i) && i <= 1) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((2 * i <= j && 1 <= i) && i < n) || (((2 * i <= j && j <= 2 * i) && 0 <= i) && i < n) RESULT: Ultimate proved your program to be correct! Received shutdown request...