/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/openssl-simplified/s3_srvr_1a.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 13:16:55,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 13:16:55,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 13:16:55,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 13:16:55,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 13:16:55,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 13:16:55,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 13:16:55,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 13:16:55,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 13:16:55,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 13:16:55,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 13:16:55,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 13:16:55,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 13:16:55,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 13:16:55,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 13:16:55,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 13:16:55,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 13:16:55,108 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 13:16:55,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 13:16:55,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 13:16:55,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 13:16:55,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 13:16:55,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 13:16:55,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 13:16:55,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 13:16:55,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 13:16:55,109 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 13:16:55,109 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 13:16:55,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 13:16:55,109 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 13:16:55,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 13:16:55,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 13:16:55,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 13:16:55,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 13:16:55,294 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 13:16:55,296 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 13:16:55,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/openssl-simplified/s3_srvr_1a.cil.c [2022-03-19 13:16:55,349 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edcb13bf3/2acb0987ba5044a0b27d2d518085872e/FLAG4cbec9d29 [2022-03-19 13:16:55,699 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 13:16:55,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1a.cil.c [2022-03-19 13:16:55,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edcb13bf3/2acb0987ba5044a0b27d2d518085872e/FLAG4cbec9d29 [2022-03-19 13:16:56,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edcb13bf3/2acb0987ba5044a0b27d2d518085872e [2022-03-19 13:16:56,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 13:16:56,141 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 13:16:56,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 13:16:56,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 13:16:56,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 13:16:56,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:16:56" (1/1) ... [2022-03-19 13:16:56,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f547aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:16:56, skipping insertion in model container [2022-03-19 13:16:56,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:16:56" (1/1) ... [2022-03-19 13:16:56,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 13:16:56,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 13:16:56,303 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1a.cil.c[14184,14197] [2022-03-19 13:16:56,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 13:16:56,310 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 13:16:56,322 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1a.cil.c[14184,14197] [2022-03-19 13:16:56,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 13:16:56,329 INFO L208 MainTranslator]: Completed translation [2022-03-19 13:16:56,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:16:56 WrapperNode [2022-03-19 13:16:56,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 13:16:56,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 13:16:56,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 13:16:56,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 13:16:56,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:16:56" (1/1) ... [2022-03-19 13:16:56,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:16:56" (1/1) ... [2022-03-19 13:16:56,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:16:56" (1/1) ... [2022-03-19 13:16:56,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:16:56" (1/1) ... [2022-03-19 13:16:56,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:16:56" (1/1) ... [2022-03-19 13:16:56,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:16:56" (1/1) ... [2022-03-19 13:16:56,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:16:56" (1/1) ... [2022-03-19 13:16:56,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 13:16:56,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 13:16:56,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 13:16:56,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 13:16:56,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:16:56" (1/1) ... [2022-03-19 13:16:56,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 13:16:56,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 13:16:56,389 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) [2022-03-19 13:16:56,390 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 [2022-03-19 13:16:56,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 13:16:56,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 13:16:56,412 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 13:16:56,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 13:16:56,412 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 13:16:56,412 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 13:16:56,412 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 13:16:56,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 13:16:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-19 13:16:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 13:16:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-19 13:16:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 13:16:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 13:16:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 13:16:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 13:16:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 13:16:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 13:16:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 13:16:56,452 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 13:16:56,453 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 13:16:56,577 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 13:16:56,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 13:16:56,581 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 13:16:56,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:16:56 BoogieIcfgContainer [2022-03-19 13:16:56,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 13:16:56,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 13:16:56,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 13:16:56,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 13:16:56,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 01:16:56" (1/3) ... [2022-03-19 13:16:56,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9a98d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:16:56, skipping insertion in model container [2022-03-19 13:16:56,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:16:56" (2/3) ... [2022-03-19 13:16:56,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9a98d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:16:56, skipping insertion in model container [2022-03-19 13:16:56,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:16:56" (3/3) ... [2022-03-19 13:16:56,587 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_1a.cil.c [2022-03-19 13:16:56,590 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 13:16:56,590 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 13:16:56,614 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 13:16:56,618 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 [2022-03-19 13:16:56,618 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 13:16:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 46 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 13:16:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-19 13:16:56,631 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:16:56,632 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:16:56,632 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:16:56,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:16:56,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1713790110, now seen corresponding path program 1 times [2022-03-19 13:16:56,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:16:56,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1537763390] [2022-03-19 13:16:56,647 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:16:56,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1713790110, now seen corresponding path program 2 times [2022-03-19 13:16:56,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:16:56,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539329945] [2022-03-19 13:16:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:16:56,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:16:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:16:56,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:16:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:16:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:16:56,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:16:56,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539329945] [2022-03-19 13:16:56,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539329945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:16:56,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:16:56,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:16:56,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:16:56,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1537763390] [2022-03-19 13:16:56,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1537763390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:16:56,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:16:56,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:16:56,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571624020] [2022-03-19 13:16:56,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:16:56,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 13:16:56,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:16:56,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 13:16:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 13:16:56,862 INFO L87 Difference]: Start difference. First operand has 51 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 46 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:16:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:16:57,044 INFO L93 Difference]: Finished difference Result 136 states and 224 transitions. [2022-03-19 13:16:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 13:16:57,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-19 13:16:57,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:16:57,052 INFO L225 Difference]: With dead ends: 136 [2022-03-19 13:16:57,052 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 13:16:57,054 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 13:16:57,056 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 187 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:16:57,057 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 79 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 13:16:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 13:16:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-19 13:16:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.5443037974683544) internal successors, (122), 79 states have internal predecessors, (122), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:16:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 125 transitions. [2022-03-19 13:16:57,086 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 125 transitions. Word has length 9 [2022-03-19 13:16:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:16:57,087 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 125 transitions. [2022-03-19 13:16:57,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:16:57,087 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 125 transitions. [2022-03-19 13:16:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 13:16:57,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:16:57,088 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:16:57,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 13:16:57,088 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:16:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:16:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1144534844, now seen corresponding path program 1 times [2022-03-19 13:16:57,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:16:57,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [205382694] [2022-03-19 13:16:59,535 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 13:16:59,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1581959862, now seen corresponding path program 1 times [2022-03-19 13:16:59,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:16:59,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240674984] [2022-03-19 13:16:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:16:59,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:16:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:16:59,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:16:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:16:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:16:59,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:16:59,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240674984] [2022-03-19 13:16:59,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240674984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:16:59,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:16:59,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 13:16:59,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:16:59,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [205382694] [2022-03-19 13:16:59,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [205382694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:16:59,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:16:59,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:16:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745022546] [2022-03-19 13:16:59,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:16:59,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:16:59,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:16:59,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:16:59,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-19 13:16:59,645 INFO L87 Difference]: Start difference. First operand 83 states and 125 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:16:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:16:59,879 INFO L93 Difference]: Finished difference Result 171 states and 267 transitions. [2022-03-19 13:16:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 13:16:59,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 13:16:59,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:16:59,880 INFO L225 Difference]: With dead ends: 171 [2022-03-19 13:16:59,880 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 13:16:59,881 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-19 13:16:59,882 INFO L912 BasicCegarLoop]: 109 mSDtfsCounter, 146 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 13:16:59,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 121 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 13:16:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 13:16:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-19 13:16:59,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.5) internal successors, (135), 90 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:16:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 138 transitions. [2022-03-19 13:16:59,893 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 138 transitions. Word has length 14 [2022-03-19 13:16:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:16:59,893 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 138 transitions. [2022-03-19 13:16:59,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:16:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 138 transitions. [2022-03-19 13:16:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 13:16:59,894 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:16:59,894 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:16:59,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 13:16:59,894 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:16:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:16:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash -974235404, now seen corresponding path program 1 times [2022-03-19 13:16:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:16:59,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1018130720] [2022-03-19 13:17:00,149 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException [2022-03-19 13:17:00,149 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 13:17:00,150 INFO L85 PathProgramCache]: Analyzing trace with hash -974235404, now seen corresponding path program 2 times [2022-03-19 13:17:00,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:17:00,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838371755] [2022-03-19 13:17:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:17:00,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:17:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:17:00,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:17:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:17:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 13:17:00,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:17:00,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838371755] [2022-03-19 13:17:00,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838371755] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:17:00,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:17:00,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:17:00,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:17:00,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1018130720] [2022-03-19 13:17:00,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1018130720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:17:00,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:17:00,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:17:00,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19160759] [2022-03-19 13:17:00,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:17:00,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 13:17:00,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:17:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 13:17:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 13:17:00,182 INFO L87 Difference]: Start difference. First operand 94 states and 138 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:17:00,250 INFO L93 Difference]: Finished difference Result 209 states and 322 transitions. [2022-03-19 13:17:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 13:17:00,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-19 13:17:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:17:00,252 INFO L225 Difference]: With dead ends: 209 [2022-03-19 13:17:00,252 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 13:17:00,252 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 13:17:00,253 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:17:00,253 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 76 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 13:17:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 13:17:00,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-19 13:17:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 127 states have (on average 1.4960629921259843) internal successors, (190), 127 states have internal predecessors, (190), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 193 transitions. [2022-03-19 13:17:00,263 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 193 transitions. Word has length 20 [2022-03-19 13:17:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:17:00,264 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 193 transitions. [2022-03-19 13:17:00,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:00,264 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 193 transitions. [2022-03-19 13:17:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 13:17:00,264 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:17:00,265 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:17:00,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 13:17:00,265 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:17:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:17:00,265 INFO L85 PathProgramCache]: Analyzing trace with hash -674137767, now seen corresponding path program 1 times [2022-03-19 13:17:00,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:17:00,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1810646301] [2022-03-19 13:17:00,759 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException [2022-03-19 13:17:00,760 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 13:17:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash -674137767, now seen corresponding path program 2 times [2022-03-19 13:17:00,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:17:00,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419559479] [2022-03-19 13:17:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:17:00,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:17:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:17:00,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:17:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:17:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 13:17:00,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:17:00,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419559479] [2022-03-19 13:17:00,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419559479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:17:00,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:17:00,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:17:00,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:17:00,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1810646301] [2022-03-19 13:17:00,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1810646301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:17:00,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:17:00,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:17:00,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136265249] [2022-03-19 13:17:00,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:17:00,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 13:17:00,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:17:00,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 13:17:00,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 13:17:00,798 INFO L87 Difference]: Start difference. First operand 131 states and 193 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:00,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:17:00,855 INFO L93 Difference]: Finished difference Result 263 states and 396 transitions. [2022-03-19 13:17:00,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 13:17:00,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 13:17:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:17:00,857 INFO L225 Difference]: With dead ends: 263 [2022-03-19 13:17:00,857 INFO L226 Difference]: Without dead ends: 148 [2022-03-19 13:17:00,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 13:17:00,858 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 70 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:17:00,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 77 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 13:17:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-19 13:17:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2022-03-19 13:17:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.4507042253521127) internal successors, (206), 142 states have internal predecessors, (206), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 209 transitions. [2022-03-19 13:17:00,868 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 209 transitions. Word has length 35 [2022-03-19 13:17:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:17:00,868 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 209 transitions. [2022-03-19 13:17:00,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 209 transitions. [2022-03-19 13:17:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 13:17:00,869 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:17:00,869 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:17:00,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 13:17:00,869 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:17:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:17:00,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1014805975, now seen corresponding path program 1 times [2022-03-19 13:17:00,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:17:00,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1378172880] [2022-03-19 13:17:01,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException [2022-03-19 13:17:01,021 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 13:17:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1014805975, now seen corresponding path program 2 times [2022-03-19 13:17:01,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:17:01,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865269682] [2022-03-19 13:17:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:17:01,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:17:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:17:01,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:17:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:17:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 13:17:01,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:17:01,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865269682] [2022-03-19 13:17:01,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865269682] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:17:01,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:17:01,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:17:01,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:17:01,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1378172880] [2022-03-19 13:17:01,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1378172880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:17:01,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:17:01,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:17:01,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550152519] [2022-03-19 13:17:01,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:17:01,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 13:17:01,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:17:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 13:17:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 13:17:01,066 INFO L87 Difference]: Start difference. First operand 146 states and 209 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:17:01,136 INFO L93 Difference]: Finished difference Result 306 states and 454 transitions. [2022-03-19 13:17:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 13:17:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 13:17:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:17:01,137 INFO L225 Difference]: With dead ends: 306 [2022-03-19 13:17:01,137 INFO L226 Difference]: Without dead ends: 176 [2022-03-19 13:17:01,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 13:17:01,138 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 83 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:17:01,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 78 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 13:17:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-19 13:17:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2022-03-19 13:17:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 168 states have (on average 1.380952380952381) internal successors, (232), 168 states have internal predecessors, (232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 235 transitions. [2022-03-19 13:17:01,148 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 235 transitions. Word has length 35 [2022-03-19 13:17:01,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:17:01,149 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 235 transitions. [2022-03-19 13:17:01,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 235 transitions. [2022-03-19 13:17:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 13:17:01,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:17:01,150 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:17:01,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 13:17:01,150 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:17:01,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:17:01,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1542489334, now seen corresponding path program 1 times [2022-03-19 13:17:01,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:17:01,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [940115597] [2022-03-19 13:17:01,407 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException [2022-03-19 13:17:01,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 13:17:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1542489334, now seen corresponding path program 2 times [2022-03-19 13:17:01,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:17:01,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526009332] [2022-03-19 13:17:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:17:01,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:17:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:17:01,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:17:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:17:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 13:17:01,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:17:01,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526009332] [2022-03-19 13:17:01,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526009332] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:17:01,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:17:01,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:17:01,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:17:01,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [940115597] [2022-03-19 13:17:01,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [940115597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:17:01,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:17:01,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 13:17:01,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575001956] [2022-03-19 13:17:01,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:17:01,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 13:17:01,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:17:01,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 13:17:01,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 13:17:01,439 INFO L87 Difference]: Start difference. First operand 172 states and 235 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:17:01,502 INFO L93 Difference]: Finished difference Result 385 states and 536 transitions. [2022-03-19 13:17:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 13:17:01,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-19 13:17:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:17:01,504 INFO L225 Difference]: With dead ends: 385 [2022-03-19 13:17:01,504 INFO L226 Difference]: Without dead ends: 229 [2022-03-19 13:17:01,504 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 13:17:01,505 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:17:01,505 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 121 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 13:17:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-19 13:17:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2022-03-19 13:17:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 223 states have (on average 1.3766816143497758) internal successors, (307), 223 states have internal predecessors, (307), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 310 transitions. [2022-03-19 13:17:01,515 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 310 transitions. Word has length 49 [2022-03-19 13:17:01,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:17:01,516 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 310 transitions. [2022-03-19 13:17:01,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 13:17:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 310 transitions. [2022-03-19 13:17:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 13:17:01,517 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:17:01,517 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:17:01,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 13:17:01,517 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:17:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:17:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash 446239409, now seen corresponding path program 1 times [2022-03-19 13:17:01,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:17:01,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1819360667] [2022-03-19 13:17:01,697 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.removeLastColumnRational(QvasrAbstractionJoin.java:428) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.pushout(QvasrAbstractionJoin.java:181) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.join(QvasrAbstractionJoin.java:116) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrSummarizer.summarizeLoop(QvasrSummarizer.java:130) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrLoopSummarization.getQvasrAcceleration(QvasrLoopSummarization.java:87) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorQvasr.accelerateLoop(AcceleratorQvasr.java:91) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:246) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-19 13:17:01,700 INFO L158 Benchmark]: Toolchain (without parser) took 5558.78ms. Allocated memory was 202.4MB in the beginning and 256.9MB in the end (delta: 54.5MB). Free memory was 152.6MB in the beginning and 184.9MB in the end (delta: -32.3MB). Peak memory consumption was 23.3MB. Max. memory is 8.0GB. [2022-03-19 13:17:01,700 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 202.4MB. Free memory was 169.0MB in the beginning and 168.8MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 13:17:01,700 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.31ms. Allocated memory is still 202.4MB. Free memory was 152.3MB in the beginning and 178.3MB in the end (delta: -26.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-19 13:17:01,700 INFO L158 Benchmark]: Boogie Preprocessor took 36.64ms. Allocated memory is still 202.4MB. Free memory was 178.3MB in the beginning and 176.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 13:17:01,700 INFO L158 Benchmark]: RCFGBuilder took 214.35ms. Allocated memory is still 202.4MB. Free memory was 176.6MB in the beginning and 164.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-19 13:17:01,701 INFO L158 Benchmark]: TraceAbstraction took 5116.36ms. Allocated memory was 202.4MB in the beginning and 256.9MB in the end (delta: 54.5MB). Free memory was 163.6MB in the beginning and 184.9MB in the end (delta: -21.3MB). Peak memory consumption was 34.0MB. Max. memory is 8.0GB. [2022-03-19 13:17:01,702 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 202.4MB. Free memory was 169.0MB in the beginning and 168.8MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 188.31ms. Allocated memory is still 202.4MB. Free memory was 152.3MB in the beginning and 178.3MB in the end (delta: -26.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.64ms. Allocated memory is still 202.4MB. Free memory was 178.3MB in the beginning and 176.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 214.35ms. Allocated memory is still 202.4MB. Free memory was 176.6MB in the beginning and 164.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 5116.36ms. Allocated memory was 202.4MB in the beginning and 256.9MB in the end (delta: 54.5MB). Free memory was 163.6MB in the beginning and 184.9MB in the end (delta: -21.3MB). Peak memory consumption was 34.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0: de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.removeLastColumnRational(QvasrAbstractionJoin.java:428) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-19 13:17:01,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...