/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/loop-invgen/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:13:23,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:13:23,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:13:23,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:13:23,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:13:23,825 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:13:23,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:13:23,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:13:23,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:13:23,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:13:23,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:13:23,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:13:23,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:13:23,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:13:23,830 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:13:23,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:13:23,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:13:23,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:13:23,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:13:23,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:13:23,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:13:23,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:13:23,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:13:23,832 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:13:23,832 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:13:23,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:13:23,832 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:13:23,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:13:24,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:13:24,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:13:24,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:13:24,123 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:13:24,125 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:13:24,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2022-03-20 18:13:24,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e96ecdd/4342abc7dfbd4666a4a5ae69b3fd2b3a/FLAG5a79d8b9e [2022-03-20 18:13:24,609 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:13:24,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2022-03-20 18:13:24,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e96ecdd/4342abc7dfbd4666a4a5ae69b3fd2b3a/FLAG5a79d8b9e [2022-03-20 18:13:25,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e96ecdd/4342abc7dfbd4666a4a5ae69b3fd2b3a [2022-03-20 18:13:25,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:13:25,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:13:25,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:13:25,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:13:25,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:13:25,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:13:25" (1/1) ... [2022-03-20 18:13:25,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@218e66c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:13:25, skipping insertion in model container [2022-03-20 18:13:25,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:13:25" (1/1) ... [2022-03-20 18:13:25,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:13:25,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:13:25,211 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i[893,906] [2022-03-20 18:13:25,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:13:25,240 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:13:25,257 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i[893,906] [2022-03-20 18:13:25,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:13:25,286 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:13:25,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:13:25 WrapperNode [2022-03-20 18:13:25,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:13:25,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:13:25,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:13:25,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:13:25,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:13:25" (1/1) ... [2022-03-20 18:13:25,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:13:25" (1/1) ... [2022-03-20 18:13:25,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:13:25" (1/1) ... [2022-03-20 18:13:25,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:13:25" (1/1) ... [2022-03-20 18:13:25,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:13:25" (1/1) ... [2022-03-20 18:13:25,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:13:25" (1/1) ... [2022-03-20 18:13:25,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:13:25" (1/1) ... [2022-03-20 18:13:25,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:13:25,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:13:25,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:13:25,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:13:25,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:13:25" (1/1) ... [2022-03-20 18:13:25,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:13:25,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:13:25,373 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) [2022-03-20 18:13:25,398 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 [2022-03-20 18:13:25,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:13:25,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:13:25,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:13:25,416 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 18:13:25,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 18:13:25,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:13:25,417 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:13:25,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:13:25,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 18:13:25,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 18:13:25,417 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:13:25,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:13:25,418 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 18:13:25,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:13:25,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 18:13:25,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:13:25,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:13:25,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:13:25,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:13:25,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:13:25,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:13:25,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:13:25,500 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:13:25,501 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:13:25,619 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:13:25,624 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:13:25,625 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 18:13:25,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:13:25 BoogieIcfgContainer [2022-03-20 18:13:25,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:13:25,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:13:25,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:13:25,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:13:25,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:13:25" (1/3) ... [2022-03-20 18:13:25,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134f07b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:13:25, skipping insertion in model container [2022-03-20 18:13:25,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:13:25" (2/3) ... [2022-03-20 18:13:25,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134f07b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:13:25, skipping insertion in model container [2022-03-20 18:13:25,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:13:25" (3/3) ... [2022-03-20 18:13:25,637 INFO L111 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.i [2022-03-20 18:13:25,642 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:13:25,642 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:13:25,698 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:13:25,723 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 [2022-03-20 18:13:25,723 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:13:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:13:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 18:13:25,766 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:13:25,767 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:13:25,768 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:13:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:13:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1180455853, now seen corresponding path program 1 times [2022-03-20 18:13:25,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:13:25,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [214017734] [2022-03-20 18:13:25,791 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:13:25,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1180455853, now seen corresponding path program 2 times [2022-03-20 18:13:25,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:13:25,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442982853] [2022-03-20 18:13:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:13:25,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:13:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:13:26,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:13:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:13:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:13:26,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:13:26,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442982853] [2022-03-20 18:13:26,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442982853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:13:26,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:13:26,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:13:26,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:13:26,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [214017734] [2022-03-20 18:13:26,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [214017734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:13:26,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:13:26,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:13:26,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489683406] [2022-03-20 18:13:26,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:13:26,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 18:13:26,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:13:26,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 18:13:26,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 18:13:26,054 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-03-20 18:13:26,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:13:26,380 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-03-20 18:13:26,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:13:26,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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 19 [2022-03-20 18:13:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:13:26,397 INFO L225 Difference]: With dead ends: 52 [2022-03-20 18:13:26,397 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 18:13:26,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:13:26,408 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:13:26,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 60 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:13:26,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 18:13:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 18:13:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 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) [2022-03-20 18:13:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-03-20 18:13:26,467 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 19 [2022-03-20 18:13:26,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:13:26,467 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-03-20 18:13:26,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-03-20 18:13:26,469 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-03-20 18:13:26,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 18:13:26,470 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:13:26,470 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:13:26,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:13:26,472 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:13:26,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:13:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash -107986180, now seen corresponding path program 1 times [2022-03-20 18:13:26,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:13:26,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1056971265] [2022-03-20 18:13:26,477 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:13:26,478 INFO L85 PathProgramCache]: Analyzing trace with hash -107986180, now seen corresponding path program 2 times [2022-03-20 18:13:26,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:13:26,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970821635] [2022-03-20 18:13:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:13:26,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:13:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:13:26,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:13:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:13:26,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 18:13:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:13:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:13:26,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:13:26,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970821635] [2022-03-20 18:13:26,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970821635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:13:26,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:13:26,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:13:26,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:13:26,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1056971265] [2022-03-20 18:13:26,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1056971265] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:13:26,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:13:26,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:13:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95556140] [2022-03-20 18:13:26,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:13:26,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 18:13:26,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:13:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 18:13:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 18:13:26,625 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:13:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:13:26,799 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-03-20 18:13:26,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:13:26,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-20 18:13:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:13:26,804 INFO L225 Difference]: With dead ends: 39 [2022-03-20 18:13:26,804 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 18:13:26,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:13:26,806 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:13:26,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 44 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:13:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 18:13:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-20 18:13:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 18:13:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-03-20 18:13:26,820 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2022-03-20 18:13:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:13:26,821 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-03-20 18:13:26,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:13:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-03-20 18:13:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 18:13:26,823 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:13:26,823 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:13:26,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 18:13:26,824 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:13:26,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:13:26,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1340590469, now seen corresponding path program 1 times [2022-03-20 18:13:26,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:13:26,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975023176] [2022-03-20 18:13:30,191 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:13:30,192 INFO L85 PathProgramCache]: Analyzing trace with hash -391048618, now seen corresponding path program 1 times [2022-03-20 18:13:30,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:13:30,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923438693] [2022-03-20 18:13:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:13:30,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:13:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:13:30,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:13:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:13:30,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 18:13:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:13:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:13:30,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:13:30,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923438693] [2022-03-20 18:13:30,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923438693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:13:30,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:13:30,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:13:30,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:13:30,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975023176] [2022-03-20 18:13:30,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975023176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:13:30,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:13:30,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:13:30,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646572970] [2022-03-20 18:13:30,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:13:30,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:13:30,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:13:30,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:13:30,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-03-20 18:13:30,620 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 17 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:13:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:13:30,847 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-03-20 18:13:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:13:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-03-20 18:13:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:13:30,848 INFO L225 Difference]: With dead ends: 40 [2022-03-20 18:13:30,848 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 18:13:30,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-20 18:13:30,850 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:13:30,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 65 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 138 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-03-20 18:13:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 18:13:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 18:13:30,852 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) [2022-03-20 18:13:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 18:13:30,852 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2022-03-20 18:13:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:13:30,852 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 18:13:30,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:13:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 18:13:30,853 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 18:13:30,855 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 18:13:30,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 18:13:30,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 18:13:31,081 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-03-20 18:13:31,084 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-03-20 18:13:31,085 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-03-20 18:13:31,085 INFO L882 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-03-20 18:13:31,085 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2022-03-20 18:13:31,085 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2022-03-20 18:13:31,085 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2022-03-20 18:13:31,086 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 24 56) the Hoare annotation is: true [2022-03-20 18:13:31,086 INFO L878 garLoopResultBuilder]: At program point L40(lines 25 56) the Hoare annotation is: (<= 1 main_~leader_len~0) [2022-03-20 18:13:31,086 INFO L885 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: true [2022-03-20 18:13:31,087 INFO L878 garLoopResultBuilder]: At program point L49-2(lines 49 53) the Hoare annotation is: (and (<= 1 main_~p~0) (<= 1 main_~leader_len~0) (< main_~p~0 (+ main_~bufsize_0~0 1))) [2022-03-20 18:13:31,087 INFO L878 garLoopResultBuilder]: At program point L49-3(lines 49 53) the Hoare annotation is: (and (<= 1 main_~p~0) (<= 1 main_~leader_len~0) (< main_~p~0 (+ main_~bufsize_0~0 1))) [2022-03-20 18:13:31,087 INFO L885 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: true [2022-03-20 18:13:31,087 INFO L885 garLoopResultBuilder]: At program point L54(lines 24 56) the Hoare annotation is: true [2022-03-20 18:13:31,087 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (<= (+ main_~p~0 3) main_~bufsize_0~0) (<= 1 main_~p~0) (<= 1 main_~leader_len~0)) [2022-03-20 18:13:31,088 INFO L878 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (and (<= (+ main_~p~0 3) main_~bufsize_0~0) (<= 1 main_~p~0) (<= 1 main_~leader_len~0)) [2022-03-20 18:13:31,088 INFO L885 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: true [2022-03-20 18:13:31,088 INFO L878 garLoopResultBuilder]: At program point L38-1(lines 25 56) the Hoare annotation is: (<= 1 main_~leader_len~0) [2022-03-20 18:13:31,088 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 56) the Hoare annotation is: true [2022-03-20 18:13:31,088 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (and (<= (+ main_~p~0 3) main_~bufsize_0~0) (<= 1 main_~p~0) (<= 1 main_~leader_len~0)) [2022-03-20 18:13:31,088 INFO L878 garLoopResultBuilder]: At program point L47(lines 47 48) the Hoare annotation is: (and (<= 1 main_~p~0) (<= (+ main_~bufsize~0 main_~p~0) main_~bufsize_0~0) (<= 1 main_~leader_len~0) (< main_~p~0 (+ main_~bufsize_0~0 1))) [2022-03-20 18:13:31,088 INFO L878 garLoopResultBuilder]: At program point L39(lines 25 56) the Hoare annotation is: (<= 1 main_~leader_len~0) [2022-03-20 18:13:31,089 INFO L885 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: true [2022-03-20 18:13:31,089 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 18:13:31,089 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 18:13:31,089 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 18:13:31,089 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 18:13:31,089 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 18:13:31,090 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 18:13:31,090 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 18:13:31,090 INFO L878 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2022-03-20 18:13:31,090 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-03-20 18:13:31,091 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2022-03-20 18:13:31,091 INFO L878 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (not (= |__VERIFIER_assert_#in~cond| 1)) [2022-03-20 18:13:31,091 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (not (= |__VERIFIER_assert_#in~cond| 1)) [2022-03-20 18:13:31,091 INFO L878 garLoopResultBuilder]: At program point L18(lines 18 20) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2022-03-20 18:13:31,094 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-03-20 18:13:31,096 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 18:13:31,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:13:31 BoogieIcfgContainer [2022-03-20 18:13:31,114 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 18:13:31,116 INFO L158 Benchmark]: Toolchain (without parser) took 6087.30ms. Allocated memory was 182.5MB in the beginning and 227.5MB in the end (delta: 45.1MB). Free memory was 125.5MB in the beginning and 163.3MB in the end (delta: -37.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-20 18:13:31,116 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 182.5MB. Free memory is still 141.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 18:13:31,116 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.06ms. Allocated memory was 182.5MB in the beginning and 227.5MB in the end (delta: 45.1MB). Free memory was 125.3MB in the beginning and 198.2MB in the end (delta: -72.9MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-03-20 18:13:31,117 INFO L158 Benchmark]: Boogie Preprocessor took 45.66ms. Allocated memory is still 227.5MB. Free memory was 198.2MB in the beginning and 196.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 18:13:31,117 INFO L158 Benchmark]: RCFGBuilder took 289.46ms. Allocated memory is still 227.5MB. Free memory was 196.6MB in the beginning and 185.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 18:13:31,117 INFO L158 Benchmark]: TraceAbstraction took 5486.12ms. Allocated memory is still 227.5MB. Free memory was 184.6MB in the beginning and 163.3MB in the end (delta: 21.3MB). Peak memory consumption was 22.3MB. Max. memory is 8.0GB. [2022-03-20 18:13:31,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 182.5MB. Free memory is still 141.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 260.06ms. Allocated memory was 182.5MB in the beginning and 227.5MB in the end (delta: 45.1MB). Free memory was 125.3MB in the beginning and 198.2MB in the end (delta: -72.9MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.66ms. Allocated memory is still 227.5MB. Free memory was 198.2MB in the beginning and 196.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 289.46ms. Allocated memory is still 227.5MB. Free memory was 196.6MB in the beginning and 185.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 5486.12ms. Allocated memory is still 227.5MB. Free memory was 184.6MB in the beginning and 163.3MB in the end (delta: 21.3MB). Peak memory consumption was 22.3MB. 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 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.4s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 105 mSDsluCounter, 169 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13 IncrementalHoareTripleChecker+Unchecked, 93 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 354 IncrementalHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 76 mSDtfsCounter, 354 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=2, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 29 LocationsWithAnnotation, 59 PreInvPairs, 83 NumberOfFragments, 139 HoareAnnotationTreeSize, 59 FomulaSimplifications, 47 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 29 FomulaSimplificationsInter, 564 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (1 <= p && 1 <= leader_len) && p < bufsize_0 + 1 - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: !(\old(cond) == 1) || \old(cond) == cond RESULT: Ultimate proved your program to be correct! [2022-03-20 18:13:31,163 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...