/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-lit/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:34:36,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:34:36,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:34:36,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:34:36,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:34:36,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:34:36,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:34:36,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:34:36,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:34:36,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:34:36,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:34:36,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:34:36,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:34:36,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:34:36,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:34:36,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:34:36,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:34:36,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:34:36,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:34:36,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:34:36,187 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 12:34:36,214 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:34:36,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:34:36,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:34:36,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:34:36,217 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:34:36,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:34:36,217 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:34:36,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:34:36,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:34:36,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:34:36,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:34:36,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:34:36,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:34:36,218 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:34:36,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:34:36,218 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:34:36,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:34:36,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:34:36,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:34:36,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:34:36,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:34:36,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:34:36,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:34:36,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:34:36,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:34:36,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:34:36,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:34:36,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:34:36,220 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:34:36,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:34:36,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:34:36,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:34:36,630 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:34:36,631 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:34:36,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2021-05-02 12:34:36,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7afdcb32d/f16e02496829471d8e9cf3b3e8df53c4/FLAGf08da1dea [2021-05-02 12:34:37,387 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:34:37,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.i [2021-05-02 12:34:37,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7afdcb32d/f16e02496829471d8e9cf3b3e8df53c4/FLAGf08da1dea [2021-05-02 12:34:37,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7afdcb32d/f16e02496829471d8e9cf3b3e8df53c4 [2021-05-02 12:34:37,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:34:37,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:34:37,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:34:37,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:34:37,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:34:37,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:34:37" (1/1) ... [2021-05-02 12:34:37,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1badf118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:37, skipping insertion in model container [2021-05-02 12:34:37,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:34:37" (1/1) ... [2021-05-02 12:34:37,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:34:37,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:34:37,801 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-lit/gsv2008.i[895,908] [2021-05-02 12:34:37,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:34:37,811 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:34:37,847 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-lit/gsv2008.i[895,908] [2021-05-02 12:34:37,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:34:37,862 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:34:37,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:37 WrapperNode [2021-05-02 12:34:37,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:34:37,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:34:37,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:34:37,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:34:37,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:37" (1/1) ... [2021-05-02 12:34:37,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:37" (1/1) ... [2021-05-02 12:34:37,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:37" (1/1) ... [2021-05-02 12:34:37,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:37" (1/1) ... [2021-05-02 12:34:37,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:37" (1/1) ... [2021-05-02 12:34:37,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:37" (1/1) ... [2021-05-02 12:34:37,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:37" (1/1) ... [2021-05-02 12:34:37,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:34:37,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:34:37,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:34:37,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:34:37,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:37" (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 12:34:37,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:34:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:34:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:34:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:34:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:34:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:34:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:34:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:34:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:34:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:34:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:34:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:34:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:34:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:34:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:34:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:34:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:34:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:34:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:34:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:34:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:34:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:34:38,150 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:34:38,150 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 12:34:38,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:34:38 BoogieIcfgContainer [2021-05-02 12:34:38,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:34:38,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:34:38,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:34:38,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:34:38,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:34:37" (1/3) ... [2021-05-02 12:34:38,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379777de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:34:38, skipping insertion in model container [2021-05-02 12:34:38,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:37" (2/3) ... [2021-05-02 12:34:38,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379777de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:34:38, skipping insertion in model container [2021-05-02 12:34:38,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:34:38" (3/3) ... [2021-05-02 12:34:38,156 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2021-05-02 12:34:38,159 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:34:38,161 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:34:38,171 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:34:38,184 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:34:38,184 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:34:38,184 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:34:38,184 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:34:38,184 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:34:38,184 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:34:38,184 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:34:38,184 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:34:38,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 12:34:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:34:38,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:38,196 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:38,196 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash 253912119, now seen corresponding path program 1 times [2021-05-02 12:34:38,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:38,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601546594] [2021-05-02 12:34:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:38,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:38,329 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 12:34:38,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:38,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601546594] [2021-05-02 12:34:38,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601546594] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:34:38,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:34:38,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 12:34:38,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477711442] [2021-05-02 12:34:38,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:34:38,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:38,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:34:38,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:34:38,343 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12:34:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:38,409 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 12:34:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:34:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-02 12:34:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:38,424 INFO L225 Difference]: With dead ends: 35 [2021-05-02 12:34:38,424 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 12:34:38,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 12:34:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 12:34:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 12:34:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 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 12:34:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 12:34:38,447 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 12:34:38,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:38,448 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 12:34:38,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12:34:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 12:34:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 12:34:38,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:38,449 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:38,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:34:38,449 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:38,450 INFO L82 PathProgramCache]: Analyzing trace with hash -684163825, now seen corresponding path program 1 times [2021-05-02 12:34:38,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:38,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659527981] [2021-05-02 12:34:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:38,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:38,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659527981] [2021-05-02 12:34:38,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659527981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343905705] [2021-05-02 12:34:38,562 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 12:34:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:38,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:34:38,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:38,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:38,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343905705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:38,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:38,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-02 12:34:38,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445987777] [2021-05-02 12:34:38,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 12:34:38,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:38,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 12:34:38,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:34:38,729 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:38,877 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 12:34:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:34:38,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 12:34:38,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:38,878 INFO L225 Difference]: With dead ends: 20 [2021-05-02 12:34:38,878 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 12:34:38,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:34:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 12:34:38,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 12:34:38,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 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 12:34:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 12:34:38,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-02 12:34:38,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:38,884 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 12:34:38,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:38,884 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 12:34:38,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 12:34:38,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:38,885 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:39,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 12:34:39,100 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:39,101 INFO L82 PathProgramCache]: Analyzing trace with hash 300252983, now seen corresponding path program 2 times [2021-05-02 12:34:39,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:39,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554258025] [2021-05-02 12:34:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:39,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:39,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:39,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554258025] [2021-05-02 12:34:39,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554258025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:39,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33263369] [2021-05-02 12:34:39,188 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 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 12:34:39,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:34:39,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:39,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 12:34:39,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:39,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:39,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33263369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:39,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:39,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-02 12:34:39,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262578615] [2021-05-02 12:34:39,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 12:34:39,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:39,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 12:34:39,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:34:39,291 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:39,421 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 12:34:39,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:34:39,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 12:34:39,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:39,422 INFO L225 Difference]: With dead ends: 21 [2021-05-02 12:34:39,422 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 12:34:39,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:34:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 12:34:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 12:34:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 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 12:34:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 12:34:39,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-05-02 12:34:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:39,425 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 12:34:39,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 12:34:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 12:34:39,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:39,426 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:39,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:39,629 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:39,630 INFO L82 PathProgramCache]: Analyzing trace with hash 752402959, now seen corresponding path program 3 times [2021-05-02 12:34:39,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:39,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170140839] [2021-05-02 12:34:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:39,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 12:34:39,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:39,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170140839] [2021-05-02 12:34:39,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170140839] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:34:39,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:34:39,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 12:34:39,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751891148] [2021-05-02 12:34:39,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:34:39,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:34:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:34:39,749 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 12:34:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:39,823 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-05-02 12:34:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:34:39,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 15 [2021-05-02 12:34:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:39,824 INFO L225 Difference]: With dead ends: 16 [2021-05-02 12:34:39,824 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:34:39,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:34:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:34:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:34:39,825 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 12:34:39,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:34:39,825 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-05-02 12:34:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:39,825 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:34:39,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 12:34:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:34:39,825 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:34:39,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 12:34:39,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:34:39,993 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 12:34:39,993 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 12:34:39,993 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 12:34:39,993 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:34:39,994 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#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 12:34:39,994 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:34:39,994 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:34:39,994 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 12:34:39,995 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:34:39,995 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:34:39,995 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-02 12:34:39,995 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:34:39,995 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:34:39,995 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:34:39,995 INFO L198 CegarLoopUtils]: For program point L33(line 33) no Hoare annotation was computed. [2021-05-02 12:34:39,995 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 35) the Hoare annotation is: true [2021-05-02 12:34:39,995 INFO L198 CegarLoopUtils]: For program point L28(line 28) no Hoare annotation was computed. [2021-05-02 12:34:39,995 INFO L194 CegarLoopUtils]: At program point L29-2(lines 29 32) the Hoare annotation is: (or (<= (+ main_~x~0 50) 0) (<= (+ main_~x~0 2) main_~y~0)) [2021-05-02 12:34:39,996 INFO L194 CegarLoopUtils]: At program point L29-3(lines 29 32) the Hoare annotation is: (or (and (<= (+ main_~x~0 53) (* 2 main_~y~0)) (<= 27 main_~y~0)) (and (<= 2 main_~y~0) (<= (+ main_~x~0 2) main_~y~0))) [2021-05-02 12:34:39,996 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 24 35) no Hoare annotation was computed. [2021-05-02 12:34:39,996 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 24 35) no Hoare annotation was computed. [2021-05-02 12:34:39,996 INFO L198 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:34:39,996 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-02 12:34:39,996 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:34:39,996 INFO L198 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-05-02 12:34:39,996 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-05-02 12:34:39,996 INFO L198 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-05-02 12:34:40,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:34:40 BoogieIcfgContainer [2021-05-02 12:34:40,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:34:40,007 INFO L168 Benchmark]: Toolchain (without parser) took 2300.86 ms. Allocated memory was 187.7 MB in the beginning and 247.5 MB in the end (delta: 59.8 MB). Free memory was 151.8 MB in the beginning and 208.6 MB in the end (delta: -56.8 MB). Peak memory consumption was 89.3 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:40,007 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 187.7 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:34:40,007 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.97 ms. Allocated memory is still 187.7 MB. Free memory was 151.6 MB in the beginning and 170.9 MB in the end (delta: -19.3 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:40,007 INFO L168 Benchmark]: Boogie Preprocessor took 41.17 ms. Allocated memory is still 187.7 MB. Free memory was 170.9 MB in the beginning and 169.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:40,007 INFO L168 Benchmark]: RCFGBuilder took 246.69 ms. Allocated memory is still 187.7 MB. Free memory was 169.3 MB in the beginning and 155.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:40,008 INFO L168 Benchmark]: TraceAbstraction took 1853.72 ms. Allocated memory was 187.7 MB in the beginning and 247.5 MB in the end (delta: 59.8 MB). Free memory was 154.6 MB in the beginning and 208.6 MB in the end (delta: -54.0 MB). Peak memory consumption was 92.3 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:40,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 187.7 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 155.97 ms. Allocated memory is still 187.7 MB. Free memory was 151.6 MB in the beginning and 170.9 MB in the end (delta: -19.3 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.17 ms. Allocated memory is still 187.7 MB. Free memory was 170.9 MB in the beginning and 169.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 246.69 ms. Allocated memory is still 187.7 MB. Free memory was 169.3 MB in the beginning and 155.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1853.72 ms. Allocated memory was 187.7 MB in the beginning and 247.5 MB in the end (delta: 59.8 MB). Free memory was 154.6 MB in the beginning and 208.6 MB in the end (delta: -54.0 MB). Peak memory consumption was 92.3 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, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1643.2ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 6.0ms, AutomataDifference: 451.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 166.7ms, InitialAbstractionConstructionTime: 6.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 44 SDtfs, 45 SDslu, 97 SDs, 0 SdLazy, 176 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 98.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 455.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.2ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 16 NumberOfFragments, 61 HoareAnnotationTreeSize, 10 FomulaSimplifications, 72 FormulaSimplificationTreeSizeReduction, 54.9ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 221 FormulaSimplificationTreeSizeReductionInter, 100.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 19.4ms SsaConstructionTime, 71.2ms SatisfiabilityAnalysisTime, 504.8ms InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 279 SizeOfPredicates, 4 NumberOfNonLiveVariables, 169 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 6/14 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: 29]: Loop Invariant Derived loop invariant: x + 50 <= 0 || x + 2 <= y RESULT: Ultimate proved your program to be correct! Received shutdown request...