/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-simple/nested_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:33:11,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:33:11,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:33:11,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:33:11,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:33:11,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:33:11,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:33:11,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:33:11,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:33:11,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:33:11,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:33:11,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:33:11,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:33:11,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:33:11,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:33:11,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:33:11,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:33:11,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:33:11,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:33:11,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:33:11,410 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 13:33:11,425 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:33:11,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:33:11,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:33:11,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:33:11,427 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:33:11,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:33:11,427 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:33:11,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:33:11,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:33:11,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:33:11,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:33:11,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:33:11,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:33:11,428 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:33:11,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:33:11,428 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:33:11,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:33:11,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:33:11,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:33:11,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:33:11,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:33:11,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:33:11,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:33:11,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:33:11,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:33:11,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:33:11,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:33:11,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:33:11,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:33:11,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:33:11,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:33:11,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:33:11,699 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:33:11,699 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:33:11,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_1.c [2021-05-02 13:33:11,760 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5af8df8/7dc0e61f74df47e18b07ceb310d962e1/FLAG3db1e90c9 [2021-05-02 13:33:12,049 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:33:12,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_1.c [2021-05-02 13:33:12,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5af8df8/7dc0e61f74df47e18b07ceb310d962e1/FLAG3db1e90c9 [2021-05-02 13:33:12,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5af8df8/7dc0e61f74df47e18b07ceb310d962e1 [2021-05-02 13:33:12,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:33:12,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:33:12,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:33:12,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:33:12,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:33:12,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:33:12" (1/1) ... [2021-05-02 13:33:12,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@781cb87a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:33:12, skipping insertion in model container [2021-05-02 13:33:12,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:33:12" (1/1) ... [2021-05-02 13:33:12,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:33:12,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:33:12,592 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-simple/nested_1.c[676,689] [2021-05-02 13:33:12,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:33:12,600 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:33:12,608 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-simple/nested_1.c[676,689] [2021-05-02 13:33:12,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:33:12,616 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:33:12,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:33:12 WrapperNode [2021-05-02 13:33:12,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:33:12,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:33:12,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:33:12,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:33:12,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:33:12" (1/1) ... [2021-05-02 13:33:12,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:33:12" (1/1) ... [2021-05-02 13:33:12,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:33:12" (1/1) ... [2021-05-02 13:33:12,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:33:12" (1/1) ... [2021-05-02 13:33:12,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:33:12" (1/1) ... [2021-05-02 13:33:12,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:33:12" (1/1) ... [2021-05-02 13:33:12,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:33:12" (1/1) ... [2021-05-02 13:33:12,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:33:12,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:33:12,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:33:12,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:33:12,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:33:12" (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 13:33:12,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:33:12,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:33:12,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:33:12,721 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:33:12,721 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:33:12,721 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:33:12,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:33:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:33:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:33:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:33:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:33:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:33:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:33:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:33:12,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:33:12,843 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:33:12,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:33:12 BoogieIcfgContainer [2021-05-02 13:33:12,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:33:12,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:33:12,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:33:12,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:33:12,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:33:12" (1/3) ... [2021-05-02 13:33:12,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56761bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:33:12, skipping insertion in model container [2021-05-02 13:33:12,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:33:12" (2/3) ... [2021-05-02 13:33:12,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56761bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:33:12, skipping insertion in model container [2021-05-02 13:33:12,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:33:12" (3/3) ... [2021-05-02 13:33:12,849 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1.c [2021-05-02 13:33:12,853 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:33:12,855 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:33:12,865 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:33:12,880 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:33:12,880 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:33:12,881 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:33:12,881 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:33:12,881 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:33:12,881 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:33:12,881 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:33:12,881 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:33:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:33:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 13:33:12,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:33:12,896 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:33:12,896 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:33:12,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:33:12,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1887993331, now seen corresponding path program 1 times [2021-05-02 13:33:12,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:33:12,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542101187] [2021-05-02 13:33:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:33:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:33:13,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:33:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:33:13,088 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 13:33:13,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:33:13,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542101187] [2021-05-02 13:33:13,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542101187] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:33:13,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:33:13,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:33:13,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615375713] [2021-05-02 13:33:13,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:33:13,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:33:13,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:33:13,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:33:13,109 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:33:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:33:13,157 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-05-02 13:33:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:33:13,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-02 13:33:13,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:33:13,165 INFO L225 Difference]: With dead ends: 24 [2021-05-02 13:33:13,165 INFO L226 Difference]: Without dead ends: 11 [2021-05-02 13:33:13,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:33:13,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-05-02 13:33:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-05-02 13:33:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:33:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-05-02 13:33:13,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-05-02 13:33:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:33:13,192 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-05-02 13:33:13,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:33:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-05-02 13:33:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 13:33:13,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:33:13,193 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:33:13,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:33:13,194 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:33:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:33:13,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1887999097, now seen corresponding path program 1 times [2021-05-02 13:33:13,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:33:13,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849143531] [2021-05-02 13:33:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:33:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:33:13,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:33:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:33:13,323 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 13:33:13,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:33:13,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849143531] [2021-05-02 13:33:13,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849143531] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:33:13,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:33:13,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:33:13,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098318714] [2021-05-02 13:33:13,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:33:13,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:33:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:33:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:33:13,326 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:33:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:33:13,384 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-05-02 13:33:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:33:13,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-02 13:33:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:33:13,386 INFO L225 Difference]: With dead ends: 16 [2021-05-02 13:33:13,386 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 13:33:13,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:33:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 13:33:13,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-05-02 13:33:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:33:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-02 13:33:13,396 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2021-05-02 13:33:13,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:33:13,396 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-02 13:33:13,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:33:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-02 13:33:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:33:13,397 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:33:13,397 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:33:13,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:33:13,398 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:33:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:33:13,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1889274843, now seen corresponding path program 1 times [2021-05-02 13:33:13,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:33:13,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984360160] [2021-05-02 13:33:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:33:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:33:13,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:33:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:33:13,486 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 13:33:13,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:33:13,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984360160] [2021-05-02 13:33:13,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984360160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:33:13,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300483968] [2021-05-02 13:33:13,487 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 13:33:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:33:13,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 13:33:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:33:13,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:33:13,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:33:13,607 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 13:33:13,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300483968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:33:13,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:33:13,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 13:33:13,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479238224] [2021-05-02 13:33:13,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:33:13,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:33:13,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:33:13,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:33:13,609 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 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 13:33:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:33:13,690 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 13:33:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:33:13,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 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 11 [2021-05-02 13:33:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:33:13,691 INFO L225 Difference]: With dead ends: 18 [2021-05-02 13:33:13,691 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 13:33:13,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:33:13,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 13:33:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-05-02 13:33:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:33:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 13:33:13,698 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-05-02 13:33:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:33:13,698 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 13:33:13,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 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 13:33:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 13:33:13,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 13:33:13,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:33:13,699 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:33:13,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 13:33:13,900 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:33:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:33:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1179700547, now seen corresponding path program 2 times [2021-05-02 13:33:13,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:33:13,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744255793] [2021-05-02 13:33:13,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:33:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:33:13,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:33:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:33:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:33:13,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:33:13,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744255793] [2021-05-02 13:33:13,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744255793] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:33:13,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:33:13,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:33:13,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499973673] [2021-05-02 13:33:13,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:33:13,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:33:13,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:33:13,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:33:13,965 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:33:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:33:14,058 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-05-02 13:33:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:33:14,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 13:33:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:33:14,059 INFO L225 Difference]: With dead ends: 14 [2021-05-02 13:33:14,059 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:33:14,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:33:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:33:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:33:14,061 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 13:33:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:33:14,061 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-05-02 13:33:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:33:14,061 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:33:14,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:33:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:33:14,061 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:33:14,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 13:33:14,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:33:14,146 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 13) no Hoare annotation was computed. [2021-05-02 13:33:14,146 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 13) no Hoare annotation was computed. [2021-05-02 13:33:14,146 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 13) no Hoare annotation was computed. [2021-05-02 13:33:14,146 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:33:14,147 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 13:33:14,147 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:33:14,147 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:33:14,147 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:33:14,147 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:33:14,147 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:33:14,147 INFO L198 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 23) no Hoare annotation was computed. [2021-05-02 13:33:14,147 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 15 26) the Hoare annotation is: true [2021-05-02 13:33:14,147 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 15 26) no Hoare annotation was computed. [2021-05-02 13:33:14,147 INFO L198 CegarLoopUtils]: For program point L23(line 23) no Hoare annotation was computed. [2021-05-02 13:33:14,147 INFO L198 CegarLoopUtils]: For program point L22-1(lines 22 24) no Hoare annotation was computed. [2021-05-02 13:33:14,147 INFO L198 CegarLoopUtils]: For program point L19-2(lines 19 21) no Hoare annotation was computed. [2021-05-02 13:33:14,148 INFO L194 CegarLoopUtils]: At program point L19-3(lines 19 21) the Hoare annotation is: (<= main_~a~0 6) [2021-05-02 13:33:14,148 INFO L198 CegarLoopUtils]: For program point L19-4(lines 15 26) no Hoare annotation was computed. [2021-05-02 13:33:14,148 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 15 26) no Hoare annotation was computed. [2021-05-02 13:33:14,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:33:14 BoogieIcfgContainer [2021-05-02 13:33:14,159 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:33:14,160 INFO L168 Benchmark]: Toolchain (without parser) took 1674.66 ms. Allocated memory is still 205.5 MB. Free memory was 170.8 MB in the beginning and 120.1 MB in the end (delta: 50.7 MB). Peak memory consumption was 51.8 MB. Max. memory is 8.0 GB. [2021-05-02 13:33:14,160 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 205.5 MB. Free memory is still 187.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:33:14,164 INFO L168 Benchmark]: CACSL2BoogieTranslator took 129.94 ms. Allocated memory is still 205.5 MB. Free memory was 170.6 MB in the beginning and 161.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:33:14,165 INFO L168 Benchmark]: Boogie Preprocessor took 16.71 ms. Allocated memory is still 205.5 MB. Free memory was 161.6 MB in the beginning and 160.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 13:33:14,167 INFO L168 Benchmark]: RCFGBuilder took 209.66 ms. Allocated memory is still 205.5 MB. Free memory was 160.1 MB in the beginning and 177.7 MB in the end (delta: -17.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:33:14,167 INFO L168 Benchmark]: TraceAbstraction took 1313.42 ms. Allocated memory is still 205.5 MB. Free memory was 177.5 MB in the beginning and 120.1 MB in the end (delta: 57.4 MB). Peak memory consumption was 57.9 MB. Max. memory is 8.0 GB. [2021-05-02 13:33:14,171 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 205.5 MB. Free memory is still 187.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 129.94 ms. Allocated memory is still 205.5 MB. Free memory was 170.6 MB in the beginning and 161.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.71 ms. Allocated memory is still 205.5 MB. Free memory was 161.6 MB in the beginning and 160.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 209.66 ms. Allocated memory is still 205.5 MB. Free memory was 160.1 MB in the beginning and 177.7 MB in the end (delta: -17.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1313.42 ms. Allocated memory is still 205.5 MB. Free memory was 177.5 MB in the beginning and 120.1 MB in the end (delta: 57.4 MB). Peak memory consumption was 57.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 23]: 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 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1183.2ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 9.3ms, AutomataDifference: 312.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 83.5ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 36 SDtfs, 34 SDslu, 29 SDs, 0 SdLazy, 41 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 295.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 30.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 7 NumberOfFragments, 37 HoareAnnotationTreeSize, 5 FomulaSimplifications, 37 FormulaSimplificationTreeSizeReduction, 37.8ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 99 FormulaSimplificationTreeSizeReductionInter, 40.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 19.7ms SsaConstructionTime, 77.1ms SatisfiabilityAnalysisTime, 392.4ms InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 81 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 4/6 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: 19]: Loop Invariant Derived loop invariant: a <= 6 RESULT: Ultimate proved your program to be correct! Received shutdown request...