/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/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 11:50:52,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 11:50:52,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 11:50:52,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 11:50:52,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 11:50:52,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 11:50:52,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 11:50:52,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 11:50:52,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 11:50:52,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 11:50:52,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 11:50:52,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 11:50:52,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 11:50:52,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 11:50:52,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 11:50:52,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 11:50:52,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 11:50:52,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 11:50:52,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 11:50:52,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 11:50:52,764 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 11:50:52,792 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 11:50:52,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 11:50:52,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 11:50:52,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 11:50:52,795 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 11:50:52,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 11:50:52,795 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 11:50:52,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 11:50:52,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 11:50:52,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 11:50:52,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 11:50:52,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 11:50:52,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 11:50:52,797 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 11:50:52,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 11:50:52,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 11:50:52,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 11:50:52,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 11:50:52,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 11:50:52,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 11:50:52,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 11:50:52,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 11:50:52,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 11:50:52,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 11:50:52,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 11:50:52,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 11:50:52,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 11:50:52,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 11:50:52,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 11:50:53,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 11:50:53,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 11:50:53,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 11:50:53,105 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 11:50:53,105 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 11:50:53,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2021-05-02 11:50:53,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf85f81d9/d1d027c8ddc14ad58099766c83d827b5/FLAG1df010175 [2021-05-02 11:50:53,499 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 11:50:53,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2021-05-02 11:50:53,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf85f81d9/d1d027c8ddc14ad58099766c83d827b5/FLAG1df010175 [2021-05-02 11:50:53,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf85f81d9/d1d027c8ddc14ad58099766c83d827b5 [2021-05-02 11:50:53,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 11:50:53,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 11:50:53,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 11:50:53,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 11:50:53,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 11:50:53,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:50:53" (1/1) ... [2021-05-02 11:50:53,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@389a6b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:53, skipping insertion in model container [2021-05-02 11:50:53,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:50:53" (1/1) ... [2021-05-02 11:50:53,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 11:50:53,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 11:50:53,659 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i[896,909] [2021-05-02 11:50:53,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:50:53,724 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 11:50:53,753 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i[896,909] [2021-05-02 11:50:53,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:50:53,777 INFO L208 MainTranslator]: Completed translation [2021-05-02 11:50:53,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:53 WrapperNode [2021-05-02 11:50:53,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 11:50:53,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 11:50:53,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 11:50:53,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 11:50:53,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:53" (1/1) ... [2021-05-02 11:50:53,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:53" (1/1) ... [2021-05-02 11:50:53,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:53" (1/1) ... [2021-05-02 11:50:53,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:53" (1/1) ... [2021-05-02 11:50:53,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:53" (1/1) ... [2021-05-02 11:50:53,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:53" (1/1) ... [2021-05-02 11:50:53,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:53" (1/1) ... [2021-05-02 11:50:53,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 11:50:53,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 11:50:53,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 11:50:53,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 11:50:53,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:53" (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 11:50:53,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 11:50:53,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 11:50:53,906 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 11:50:53,906 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 11:50:53,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 11:50:53,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 11:50:53,907 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 11:50:53,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 11:50:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 11:50:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 11:50:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 11:50:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 11:50:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 11:50:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 11:50:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-05-02 11:50:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 11:50:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 11:50:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 11:50:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 11:50:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 11:50:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 11:50:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 11:50:54,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 11:50:54,197 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-05-02 11:50:54,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:50:54 BoogieIcfgContainer [2021-05-02 11:50:54,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 11:50:54,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 11:50:54,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 11:50:54,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 11:50:54,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:50:53" (1/3) ... [2021-05-02 11:50:54,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2e29fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:50:54, skipping insertion in model container [2021-05-02 11:50:54,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:50:53" (2/3) ... [2021-05-02 11:50:54,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2e29fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:50:54, skipping insertion in model container [2021-05-02 11:50:54,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:50:54" (3/3) ... [2021-05-02 11:50:54,203 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2021-05-02 11:50:54,207 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 11:50:54,209 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 11:50:54,219 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 11:50:54,233 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 11:50:54,233 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 11:50:54,233 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 11:50:54,233 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 11:50:54,233 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 11:50:54,233 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 11:50:54,233 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 11:50:54,234 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 11:50:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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 11:50:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 11:50:54,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:54,248 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:54,249 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:54,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:54,252 INFO L82 PathProgramCache]: Analyzing trace with hash 739829093, now seen corresponding path program 1 times [2021-05-02 11:50:54,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:54,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641733076] [2021-05-02 11:50:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:54,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:54,458 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 11:50:54,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:54,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641733076] [2021-05-02 11:50:54,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641733076] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:50:54,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:50:54,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 11:50:54,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896948453] [2021-05-02 11:50:54,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 11:50:54,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:54,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 11:50:54,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 11:50:54,474 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 11:50:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:54,619 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2021-05-02 11:50:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 11:50:54,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 22 [2021-05-02 11:50:54,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:54,625 INFO L225 Difference]: With dead ends: 73 [2021-05-02 11:50:54,625 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 11:50:54,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 11:50:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 11:50:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-05-02 11:50:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 11:50:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-05-02 11:50:54,664 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2021-05-02 11:50:54,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:54,664 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-05-02 11:50:54,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 11:50:54,664 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-05-02 11:50:54,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 11:50:54,665 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:54,665 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:54,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 11:50:54,666 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:54,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1075962823, now seen corresponding path program 1 times [2021-05-02 11:50:54,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:54,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553513566] [2021-05-02 11:50:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:54,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 11:50:54,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:54,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553513566] [2021-05-02 11:50:54,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553513566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:54,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059283566] [2021-05-02 11:50:54,784 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 11:50:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:54,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 11:50:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:50:54,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:54,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 11:50:54,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059283566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:54,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:50:54,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 11:50:54,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107914536] [2021-05-02 11:50:54,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 11:50:54,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:54,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 11:50:54,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 11:50:54,953 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:55,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:55,076 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-05-02 11:50:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 11:50:55,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 11:50:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:55,078 INFO L225 Difference]: With dead ends: 65 [2021-05-02 11:50:55,078 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 11:50:55,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 11:50:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 11:50:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-05-02 11:50:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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 11:50:55,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 11:50:55,097 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2021-05-02 11:50:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:55,097 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 11:50:55,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:55,097 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 11:50:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 11:50:55,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:55,098 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, 1, 1, 1, 1] [2021-05-02 11:50:55,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 11:50:55,299 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:55,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:55,299 INFO L82 PathProgramCache]: Analyzing trace with hash 875420793, now seen corresponding path program 2 times [2021-05-02 11:50:55,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:55,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388234606] [2021-05-02 11:50:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:55,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 11:50:55,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388234606] [2021-05-02 11:50:55,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388234606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385222502] [2021-05-02 11:50:55,355 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 11:50:55,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 11:50:55,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:50:55,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 11:50:55,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:50:55,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:55,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:55,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:55,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 11:50:55,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385222502] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:50:55,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 11:50:55,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-05-02 11:50:55,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315519874] [2021-05-02 11:50:55,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 11:50:55,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:55,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 11:50:55,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 11:50:55,544 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 11:50:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:55,588 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-05-02 11:50:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 11:50:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 32 [2021-05-02 11:50:55,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:55,596 INFO L225 Difference]: With dead ends: 50 [2021-05-02 11:50:55,596 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 11:50:55,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 11:50:55,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 11:50:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 11:50:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 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 11:50:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-05-02 11:50:55,605 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 32 [2021-05-02 11:50:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:55,605 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-05-02 11:50:55,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 11:50:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-05-02 11:50:55,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 11:50:55,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:55,606 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:55,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:50:55,822 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:55,823 INFO L82 PathProgramCache]: Analyzing trace with hash 860279700, now seen corresponding path program 1 times [2021-05-02 11:50:55,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:55,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276167178] [2021-05-02 11:50:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:55,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 11:50:55,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:55,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276167178] [2021-05-02 11:50:55,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276167178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:55,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142647948] [2021-05-02 11:50:55,869 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 11:50:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:55,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 11:50:55,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:50:55,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:55,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:55,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:55,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 11:50:55,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142647948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:55,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:50:55,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 11:50:55,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637039260] [2021-05-02 11:50:55,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 11:50:55,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:55,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 11:50:55,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 11:50:55,972 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:56,061 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2021-05-02 11:50:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 11:50:56,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 11:50:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:56,062 INFO L225 Difference]: With dead ends: 79 [2021-05-02 11:50:56,062 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 11:50:56,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 11:50:56,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 11:50:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2021-05-02 11:50:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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 11:50:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-05-02 11:50:56,066 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2021-05-02 11:50:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:56,066 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-05-02 11:50:56,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-05-02 11:50:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 11:50:56,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:56,067 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:56,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:50:56,269 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:56,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1256051412, now seen corresponding path program 2 times [2021-05-02 11:50:56,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:56,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014442137] [2021-05-02 11:50:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:56,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-02 11:50:56,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:56,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014442137] [2021-05-02 11:50:56,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014442137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:56,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794611329] [2021-05-02 11:50:56,330 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 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 11:50:56,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 11:50:56,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:50:56,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 11:50:56,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:50:56,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:56,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:56,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-02 11:50:56,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794611329] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:50:56,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 11:50:56,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-05-02 11:50:56,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429690280] [2021-05-02 11:50:56,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 11:50:56,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:56,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 11:50:56,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 11:50:56,484 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 11:50:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:56,505 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-02 11:50:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 11:50:56,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 38 [2021-05-02 11:50:56,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:56,506 INFO L225 Difference]: With dead ends: 40 [2021-05-02 11:50:56,506 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 11:50:56,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 11:50:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 11:50:56,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 11:50:56,506 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 11:50:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 11:50:56,507 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-05-02 11:50:56,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:56,507 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 11:50:56,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 11:50:56,507 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 11:50:56,507 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 11:50:56,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:50:56,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 11:50:56,791 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 11:50:56,791 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 11:50:56,791 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 11:50:56,791 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 11:50:56,792 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 11:50:56,792 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 11:50:56,792 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 11:50:56,792 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 11:50:56,792 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 11:50:56,792 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 11:50:56,792 INFO L198 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 15 17) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 28 72) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L194 CegarLoopUtils]: At program point L69(line 69) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point L69-1(line 69) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point L53-2(lines 53 65) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point L37-2(lines 37 38) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L194 CegarLoopUtils]: At program point L37-3(lines 37 38) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point L37-4(lines 37 38) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point L33-2(lines 33 34) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L194 CegarLoopUtils]: At program point L33-3(lines 33 34) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point L33-4(lines 33 34) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point L46-1(lines 46 47) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 28 72) no Hoare annotation was computed. [2021-05-02 11:50:56,793 INFO L194 CegarLoopUtils]: At program point L46-3(lines 46 47) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2021-05-02 11:50:56,793 INFO L198 CegarLoopUtils]: For program point L46-4(lines 29 72) no Hoare annotation was computed. [2021-05-02 11:50:56,794 INFO L198 CegarLoopUtils]: For program point L42-1(lines 42 43) no Hoare annotation was computed. [2021-05-02 11:50:56,794 INFO L194 CegarLoopUtils]: At program point L42-3(lines 42 43) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2021-05-02 11:50:56,794 INFO L198 CegarLoopUtils]: For program point L42-4(lines 42 43) no Hoare annotation was computed. [2021-05-02 11:50:56,794 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 28 72) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2021-05-02 11:50:56,794 INFO L198 CegarLoopUtils]: For program point L55(lines 55 64) no Hoare annotation was computed. [2021-05-02 11:50:56,794 INFO L194 CegarLoopUtils]: At program point L55-2(lines 53 65) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0) (and (<= 0 main_~j~0) (<= main_~nc_B~0 0))) [2021-05-02 11:50:56,794 INFO L198 CegarLoopUtils]: For program point L39(line 39) no Hoare annotation was computed. [2021-05-02 11:50:56,794 INFO L198 CegarLoopUtils]: For program point L35(line 35) no Hoare annotation was computed. [2021-05-02 11:50:56,794 INFO L198 CegarLoopUtils]: For program point L19-2(lines 18 23) no Hoare annotation was computed. [2021-05-02 11:50:56,794 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 18 23) the Hoare annotation is: true [2021-05-02 11:50:56,794 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 18 23) no Hoare annotation was computed. [2021-05-02 11:50:56,794 INFO L198 CegarLoopUtils]: For program point L20(line 20) no Hoare annotation was computed. [2021-05-02 11:50:56,794 INFO L198 CegarLoopUtils]: For program point L19(lines 19 21) no Hoare annotation was computed. [2021-05-02 11:50:56,794 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2021-05-02 11:50:56,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:50:56 BoogieIcfgContainer [2021-05-02 11:50:56,804 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 11:50:56,804 INFO L168 Benchmark]: Toolchain (without parser) took 3281.66 ms. Allocated memory was 172.0 MB in the beginning and 215.0 MB in the end (delta: 43.0 MB). Free memory was 136.0 MB in the beginning and 123.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 56.9 MB. Max. memory is 8.0 GB. [2021-05-02 11:50:56,804 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 172.0 MB. Free memory is still 153.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 11:50:56,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.40 ms. Allocated memory is still 172.0 MB. Free memory was 135.8 MB in the beginning and 153.0 MB in the end (delta: -17.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 11:50:56,804 INFO L168 Benchmark]: Boogie Preprocessor took 60.58 ms. Allocated memory is still 172.0 MB. Free memory was 153.0 MB in the beginning and 151.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 11:50:56,804 INFO L168 Benchmark]: RCFGBuilder took 358.90 ms. Allocated memory is still 172.0 MB. Free memory was 151.5 MB in the beginning and 131.0 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-05-02 11:50:56,804 INFO L168 Benchmark]: TraceAbstraction took 2604.10 ms. Allocated memory was 172.0 MB in the beginning and 215.0 MB in the end (delta: 43.0 MB). Free memory was 130.5 MB in the beginning and 123.4 MB in the end (delta: 7.1 MB). Peak memory consumption was 51.6 MB. Max. memory is 8.0 GB. [2021-05-02 11:50:56,805 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 172.0 MB. Free memory is still 153.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.40 ms. Allocated memory is still 172.0 MB. Free memory was 135.8 MB in the beginning and 153.0 MB in the end (delta: -17.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.58 ms. Allocated memory is still 172.0 MB. Free memory was 153.0 MB in the beginning and 151.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 358.90 ms. Allocated memory is still 172.0 MB. Free memory was 151.5 MB in the beginning and 131.0 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2604.10 ms. Allocated memory was 172.0 MB in the beginning and 215.0 MB in the end (delta: 43.0 MB). Free memory was 130.5 MB in the beginning and 123.4 MB in the end (delta: 7.1 MB). Peak memory consumption was 51.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: 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, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2489.5ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 7.4ms, AutomataDifference: 458.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 69.5ms, InitialAbstractionConstructionTime: 6.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 139 SDtfs, 78 SDslu, 306 SDs, 0 SdLazy, 256 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 243.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 231.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=4, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.3ms AutomataMinimizationTime, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 84 HoareAnnotationTreeSize, 16 FomulaSimplifications, 87 FormulaSimplificationTreeSizeReduction, 15.1ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 50 FormulaSimplificationTreeSizeReductionInter, 44.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 56.9ms SsaConstructionTime, 154.6ms SatisfiabilityAnalysisTime, 724.6ms InterpolantComputationTime, 286 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 277 ConstructedInterpolants, 0 QuantifiedInterpolants, 489 SizeOfPredicates, 6 NumberOfNonLiveVariables, 529 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 57/80 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: 46]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: (1 == found || 0 == found) || (0 <= j && nc_B <= 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...