/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gcnr2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:34:09,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:34:09,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:34:09,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:34:09,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:34:09,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:34:09,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:34:09,752 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 12:34:09,767 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:34:09,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:34:09,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:34:09,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:34:09,769 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:34:09,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:34:09,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:34:09,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:34:09,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:34:09,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:34:09,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:34:09,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:34:09,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:34:09,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:34:09,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:34:09,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:34:09,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:34:09,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:34:09,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:34:09,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:34:09,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:34:09,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:34:09,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:34:09,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:34:09,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:34:09,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:34:09,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:34:09,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:34:09,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:34:10,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:34:10,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:34:10,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:34:10,036 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:34:10,036 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:34:10,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gcnr2008.i [2021-05-02 12:34:10,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/279c7bee4/7645a3791be04ebc848630b8932af79a/FLAGbe1a5562e [2021-05-02 12:34:10,467 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:34:10,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i [2021-05-02 12:34:10,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/279c7bee4/7645a3791be04ebc848630b8932af79a/FLAGbe1a5562e [2021-05-02 12:34:10,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/279c7bee4/7645a3791be04ebc848630b8932af79a [2021-05-02 12:34:10,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:34:10,487 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:34:10,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:34:10,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:34:10,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:34:10,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:34:10" (1/1) ... [2021-05-02 12:34:10,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ad0337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:10, skipping insertion in model container [2021-05-02 12:34:10,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:34:10" (1/1) ... [2021-05-02 12:34:10,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:34:10,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:34:10,611 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i[895,908] [2021-05-02 12:34:10,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:34:10,624 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:34:10,666 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i[895,908] [2021-05-02 12:34:10,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:34:10,678 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:34:10,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:10 WrapperNode [2021-05-02 12:34:10,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:34:10,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:34:10,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:34:10,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:34:10,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:10" (1/1) ... [2021-05-02 12:34:10,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:10" (1/1) ... [2021-05-02 12:34:10,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:10" (1/1) ... [2021-05-02 12:34:10,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:10" (1/1) ... [2021-05-02 12:34:10,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:10" (1/1) ... [2021-05-02 12:34:10,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:10" (1/1) ... [2021-05-02 12:34:10,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:10" (1/1) ... [2021-05-02 12:34:10,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:34:10,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:34:10,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:34:10,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:34:10,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:34:10,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:34:10,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:34:10,845 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:34:10,845 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:34:10,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:34:10,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:34:10,846 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:34:10,846 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:34:10,847 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:34:10,847 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:34:10,847 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:34:10,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:34:10,847 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:34:10,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:34:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:34:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:34:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:34:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:34:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:34:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:34:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:34:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:34:11,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:34:11,046 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 12:34:11,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:34:11 BoogieIcfgContainer [2021-05-02 12:34:11,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:34:11,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:34:11,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:34:11,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:34:11,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:34:10" (1/3) ... [2021-05-02 12:34:11,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275ef4a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:34:11, skipping insertion in model container [2021-05-02 12:34:11,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:10" (2/3) ... [2021-05-02 12:34:11,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275ef4a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:34:11, skipping insertion in model container [2021-05-02 12:34:11,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:34:11" (3/3) ... [2021-05-02 12:34:11,053 INFO L111 eAbstractionObserver]: Analyzing ICFG gcnr2008.i [2021-05-02 12:34:11,056 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:34:11,059 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:34:11,071 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:34:11,087 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:34:11,088 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:34:11,088 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:34:11,088 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:34:11,088 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:34:11,088 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:34:11,088 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:34:11,088 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:34:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:34:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 12:34:11,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:11,102 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:11,103 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:11,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:11,106 INFO L82 PathProgramCache]: Analyzing trace with hash 179110084, now seen corresponding path program 1 times [2021-05-02 12:34:11,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:11,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196337377] [2021-05-02 12:34:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:11,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:11,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:11,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196337377] [2021-05-02 12:34:11,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196337377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:34:11,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:34:11,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 12:34:11,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524866440] [2021-05-02 12:34:11,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 12:34:11,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:11,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 12:34:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:34:11,255 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:11,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:11,294 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 12:34:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 12:34:11,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-02 12:34:11,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:11,301 INFO L225 Difference]: With dead ends: 37 [2021-05-02 12:34:11,302 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 12:34:11,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:34:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 12:34:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 12:34:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-05-02 12:34:11,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2021-05-02 12:34:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:11,333 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-05-02 12:34:11,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-05-02 12:34:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:34:11,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:11,334 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:11,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:34:11,334 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:11,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:11,335 INFO L82 PathProgramCache]: Analyzing trace with hash 354566591, now seen corresponding path program 1 times [2021-05-02 12:34:11,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:11,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206935486] [2021-05-02 12:34:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 12:34:11,357 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 12:34:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 12:34:11,369 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 12:34:11,383 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 12:34:11,383 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 12:34:11,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:34:11,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:34:11 BoogieIcfgContainer [2021-05-02 12:34:11,400 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:34:11,401 INFO L168 Benchmark]: Toolchain (without parser) took 913.44 ms. Allocated memory is still 194.0 MB. Free memory was 157.4 MB in the beginning and 129.6 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.6 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:11,402 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 194.0 MB. Free memory is still 174.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:34:11,402 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.32 ms. Allocated memory is still 194.0 MB. Free memory was 157.2 MB in the beginning and 175.6 MB in the end (delta: -18.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:11,403 INFO L168 Benchmark]: Boogie Preprocessor took 33.68 ms. Allocated memory is still 194.0 MB. Free memory was 175.6 MB in the beginning and 174.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:11,403 INFO L168 Benchmark]: RCFGBuilder took 333.77 ms. Allocated memory is still 194.0 MB. Free memory was 174.1 MB in the beginning and 158.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:11,404 INFO L168 Benchmark]: TraceAbstraction took 351.46 ms. Allocated memory is still 194.0 MB. Free memory was 157.9 MB in the beginning and 129.6 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:11,406 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 194.0 MB. Free memory is still 174.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 190.32 ms. Allocated memory is still 194.0 MB. Free memory was 157.2 MB in the beginning and 175.6 MB in the end (delta: -18.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.68 ms. Allocated memory is still 194.0 MB. Free memory was 175.6 MB in the beginning and 174.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 333.77 ms. Allocated memory is still 194.0 MB. Free memory was 174.1 MB in the beginning and 158.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 351.46 ms. Allocated memory is still 194.0 MB. Free memory was 157.9 MB in the beginning and 129.6 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int x,y,z,w; [L26] EXPR w = 0 [L26] EXPR z = w = 0 [L26] EXPR y = z = w = 0 [L26] x = y = z = w = 0 VAL [w=0, x=0, y=0, z=0] [L27] COND FALSE !(__VERIFIER_nondet_int() && y < 10000) [L42] CALL __VERIFIER_assert(x >= 4 && y <= 2) VAL [\old(cond)=0] [L18] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 298.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.4ms, AutomataDifference: 58.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 20 SDslu, 3 SDs, 0 SdLazy, 4 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.0ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.2ms SsaConstructionTime, 34.0ms SatisfiabilityAnalysisTime, 67.7ms InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 34 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...