/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:02:40,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:02:40,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:02:40,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:02:40,920 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:02:40,932 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:02:40,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:02:40,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:02:40,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:02:40,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:02:40,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:02:40,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:02:40,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:02:40,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:02:40,937 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:02:40,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:02:40,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:02:40,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:02:40,938 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:02:40,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:02:40,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:02:40,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:02:40,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:02:40,939 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:02:40,940 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:02:40,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:02:40,943 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:02:40,943 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:02:41,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:02:41,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:02:41,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:02:41,171 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:02:41,175 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:02:41,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2022-03-18 00:02:41,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4db50369/68b3dfe20a914bd5b1fb6340daa32c1f/FLAG0185a7b6d [2022-03-18 00:02:41,607 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:02:41,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2022-03-18 00:02:41,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4db50369/68b3dfe20a914bd5b1fb6340daa32c1f/FLAG0185a7b6d [2022-03-18 00:02:41,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4db50369/68b3dfe20a914bd5b1fb6340daa32c1f [2022-03-18 00:02:41,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:02:41,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:02:41,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:02:41,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:02:41,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:02:41,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:02:41" (1/1) ... [2022-03-18 00:02:41,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc132d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:02:41, skipping insertion in model container [2022-03-18 00:02:41,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:02:41" (1/1) ... [2022-03-18 00:02:41,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:02:41,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:02:41,774 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c[333,346] [2022-03-18 00:02:41,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:02:41,789 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:02:41,797 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c[333,346] [2022-03-18 00:02:41,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:02:41,807 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:02:41,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:02:41 WrapperNode [2022-03-18 00:02:41,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:02:41,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:02:41,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:02:41,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:02:41,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:02:41" (1/1) ... [2022-03-18 00:02:41,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:02:41" (1/1) ... [2022-03-18 00:02:41,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:02:41" (1/1) ... [2022-03-18 00:02:41,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:02:41" (1/1) ... [2022-03-18 00:02:41,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:02:41" (1/1) ... [2022-03-18 00:02:41,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:02:41" (1/1) ... [2022-03-18 00:02:41,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:02:41" (1/1) ... [2022-03-18 00:02:41,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:02:41,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:02:41,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:02:41,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:02:41,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:02:41" (1/1) ... [2022-03-18 00:02:41,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:02:41,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:02:41,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 00:02:41,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 00:02:41,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:02:41,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:02:41,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:02:41,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:02:41,899 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2022-03-18 00:02:41,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:02:41,899 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:02:41,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:02:41,899 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:02:41,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:02:41,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:02:41,900 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2022-03-18 00:02:41,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:02:41,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:02:41,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:02:41,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:02:41,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:02:41,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:02:41,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:02:41,955 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:02:41,956 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:02:42,012 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:02:42,016 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:02:42,017 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 00:02:42,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:02:42 BoogieIcfgContainer [2022-03-18 00:02:42,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:02:42,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:02:42,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:02:42,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:02:42,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:02:41" (1/3) ... [2022-03-18 00:02:42,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cce707e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:02:42, skipping insertion in model container [2022-03-18 00:02:42,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:02:41" (2/3) ... [2022-03-18 00:02:42,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cce707e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:02:42, skipping insertion in model container [2022-03-18 00:02:42,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:02:42" (3/3) ... [2022-03-18 00:02:42,045 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2022-03-18 00:02:42,049 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:02:42,049 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:02:42,109 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:02:42,114 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 00:02:42,115 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:02:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 00:02:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-18 00:02:42,153 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:02:42,154 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:02:42,155 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:02:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:02:42,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1499484955, now seen corresponding path program 1 times [2022-03-18 00:02:42,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:02:42,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1459057965] [2022-03-18 00:02:42,182 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:02:42,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1499484955, now seen corresponding path program 2 times [2022-03-18 00:02:42,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:02:42,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416047373] [2022-03-18 00:02:42,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:02:42,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:02:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:02:42,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:02:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:02:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:02:42,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:02:42,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416047373] [2022-03-18 00:02:42,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416047373] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:02:42,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:02:42,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:02:42,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:02:42,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1459057965] [2022-03-18 00:02:42,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1459057965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:02:42,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:02:42,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:02:42,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798059516] [2022-03-18 00:02:42,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:02:42,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:02:42,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:02:42,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:02:42,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:02:42,406 INFO L87 Difference]: Start difference. First operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-03-18 00:02:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:02:42,468 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2022-03-18 00:02:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:02:42,470 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), 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 10 [2022-03-18 00:02:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:02:42,482 INFO L225 Difference]: With dead ends: 37 [2022-03-18 00:02:42,483 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 00:02:42,486 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:02:42,491 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:02:42,493 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:02:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 00:02:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-03-18 00:02:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:02:42,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-18 00:02:42,529 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2022-03-18 00:02:42,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:02:42,529 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-18 00:02:42,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-03-18 00:02:42,530 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-18 00:02:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 00:02:42,531 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:02:42,531 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:02:42,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:02:42,532 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:02:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:02:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1713498874, now seen corresponding path program 1 times [2022-03-18 00:02:42,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:02:42,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574731489] [2022-03-18 00:02:42,535 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:02:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1713498874, now seen corresponding path program 2 times [2022-03-18 00:02:42,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:02:42,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736349699] [2022-03-18 00:02:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:02:42,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:02:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:02:42,568 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:02:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:02:42,589 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:02:42,589 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-18 00:02:42,589 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 00:02:42,591 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 00:02:42,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:02:42,595 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2] [2022-03-18 00:02:42,597 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 00:02:42,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 12:02:42 BoogieIcfgContainer [2022-03-18 00:02:42,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 00:02:42,605 INFO L158 Benchmark]: Toolchain (without parser) took 978.64ms. Allocated memory is still 177.2MB. Free memory was 127.1MB in the beginning and 114.0MB in the end (delta: 13.1MB). Peak memory consumption was 12.1MB. Max. memory is 8.0GB. [2022-03-18 00:02:42,605 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 177.2MB. Free memory was 143.9MB in the beginning and 143.8MB in the end (delta: 70.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 00:02:42,606 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.82ms. Allocated memory is still 177.2MB. Free memory was 127.0MB in the beginning and 153.2MB in the end (delta: -26.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 00:02:42,606 INFO L158 Benchmark]: Boogie Preprocessor took 22.05ms. Allocated memory is still 177.2MB. Free memory was 153.2MB in the beginning and 151.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 00:02:42,606 INFO L158 Benchmark]: RCFGBuilder took 187.11ms. Allocated memory is still 177.2MB. Free memory was 151.7MB in the beginning and 142.3MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-18 00:02:42,607 INFO L158 Benchmark]: TraceAbstraction took 584.96ms. Allocated memory is still 177.2MB. Free memory was 141.7MB in the beginning and 114.0MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-03-18 00:02:42,609 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 177.2MB. Free memory was 143.9MB in the beginning and 143.8MB in the end (delta: 70.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 180.82ms. Allocated memory is still 177.2MB. Free memory was 127.0MB in the beginning and 153.2MB in the end (delta: -26.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.05ms. Allocated memory is still 177.2MB. Free memory was 153.2MB in the beginning and 151.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 187.11ms. Allocated memory is still 177.2MB. Free memory was 151.7MB in the beginning and 142.3MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 584.96ms. Allocated memory is still 177.2MB. Free memory was 141.7MB in the beginning and 114.0MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int x=0; [L26] COND TRUE 1 [L28] CALL eval() [L16] COND TRUE 1 [L17] x=1 [L28] RET eval() [L29] CALL __VERIFIER_assert(x==0) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6 mSDsluCounter, 20 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 18 mSDtfsCounter, 7 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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! [2022-03-18 00:02:42,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...