/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:45:58,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:45:58,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:45:58,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 17:45:58,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:45:58,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:45:58,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:45:58,587 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 17:45:58,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:45:58,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:45:58,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:45:58,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:45:58,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:45:58,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:45:58,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:45:58,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:45:58,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:45:58,598 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:45:58,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:45:58,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:45:58,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:45:58,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:45:58,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:45:58,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:45:58,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:45:58,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:45:58,599 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:45:58,599 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:45:58,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:45:58,599 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:45:58,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:45:58,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:45:58,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:45:58,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:45:58,820 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:45:58,821 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:45:58,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2022-03-20 17:45:58,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/945f28b25/48219e38d3b54eafbcac3ccddbabf2b9/FLAGe30a6a5ee [2022-03-20 17:45:59,201 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:45:59,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2022-03-20 17:45:59,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/945f28b25/48219e38d3b54eafbcac3ccddbabf2b9/FLAGe30a6a5ee [2022-03-20 17:45:59,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/945f28b25/48219e38d3b54eafbcac3ccddbabf2b9 [2022-03-20 17:45:59,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:45:59,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:45:59,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:45:59,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:45:59,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:45:59,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:45:59" (1/1) ... [2022-03-20 17:45:59,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6990e361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:59, skipping insertion in model container [2022-03-20 17:45:59,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:45:59" (1/1) ... [2022-03-20 17:45:59,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:45:59,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:45:59,364 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c[383,396] [2022-03-20 17:45:59,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:45:59,387 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:45:59,393 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c[383,396] [2022-03-20 17:45:59,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:45:59,405 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:45:59,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:59 WrapperNode [2022-03-20 17:45:59,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:45:59,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:45:59,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:45:59,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:45:59,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:59" (1/1) ... [2022-03-20 17:45:59,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:59" (1/1) ... [2022-03-20 17:45:59,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:59" (1/1) ... [2022-03-20 17:45:59,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:59" (1/1) ... [2022-03-20 17:45:59,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:59" (1/1) ... [2022-03-20 17:45:59,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:59" (1/1) ... [2022-03-20 17:45:59,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:59" (1/1) ... [2022-03-20 17:45:59,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:45:59,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:45:59,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:45:59,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:45:59,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:59" (1/1) ... [2022-03-20 17:45:59,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:45:59,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:59,476 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 17:45:59,480 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 17:45:59,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:45:59,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:45:59,502 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:45:59,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:45:59,502 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2022-03-20 17:45:59,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:45:59,502 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-20 17:45:59,502 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:45:59,503 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:45:59,503 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:45:59,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:45:59,503 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-20 17:45:59,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:45:59,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 17:45:59,504 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2022-03-20 17:45:59,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:45:59,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:45:59,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-20 17:45:59,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-20 17:45:59,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:45:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:45:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:45:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:45:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:45:59,572 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:45:59,573 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:45:59,717 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:45:59,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:45:59,722 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 17:45:59,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:45:59 BoogieIcfgContainer [2022-03-20 17:45:59,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:45:59,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:45:59,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:45:59,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:45:59,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:45:59" (1/3) ... [2022-03-20 17:45:59,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbe2605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:45:59, skipping insertion in model container [2022-03-20 17:45:59,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:59" (2/3) ... [2022-03-20 17:45:59,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbe2605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:45:59, skipping insertion in model container [2022-03-20 17:45:59,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:45:59" (3/3) ... [2022-03-20 17:45:59,733 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_search.c [2022-03-20 17:45:59,737 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:45:59,737 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:45:59,777 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:45:59,783 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 17:45:59,784 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:45:59,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 17:45:59,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 17:45:59,810 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:59,811 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:45:59,811 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:59,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:59,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1001129449, now seen corresponding path program 1 times [2022-03-20 17:45:59,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:59,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368035142] [2022-03-20 17:45:59,829 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:45:59,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1001129449, now seen corresponding path program 2 times [2022-03-20 17:45:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:59,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211049452] [2022-03-20 17:45:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:59,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:46:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:46:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,069 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 17:46:00,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:00,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211049452] [2022-03-20 17:46:00,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211049452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:00,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:00,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:46:00,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:00,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368035142] [2022-03-20 17:46:00,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368035142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:00,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:00,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:46:00,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113964342] [2022-03-20 17:46:00,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:00,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:46:00,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:00,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:46:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:46:00,100 INFO L87 Difference]: Start difference. First operand has 34 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:46:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:00,200 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-03-20 17:46:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:46:00,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 17:46:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:00,207 INFO L225 Difference]: With dead ends: 52 [2022-03-20 17:46:00,207 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 17:46:00,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:46:00,213 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:00,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 17:46:00,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 17:46:00,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:00,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 17:46:00,248 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-20 17:46:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:00,249 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 17:46:00,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:46:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 17:46:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 17:46:00,251 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:00,252 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 17:46:00,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:46:00,255 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:00,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:00,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2092261110, now seen corresponding path program 1 times [2022-03-20 17:46:00,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:00,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438915772] [2022-03-20 17:46:00,259 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:46:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2092261110, now seen corresponding path program 2 times [2022-03-20 17:46:00,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:00,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223846766] [2022-03-20 17:46:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:00,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:46:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:46:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,437 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 17:46:00,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:00,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223846766] [2022-03-20 17:46:00,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223846766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:00,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:00,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:00,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:00,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438915772] [2022-03-20 17:46:00,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438915772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:00,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:00,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:00,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600473976] [2022-03-20 17:46:00,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:00,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:46:00,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:00,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:46:00,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:46:00,447 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:46:00,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:00,646 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-03-20 17:46:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:46:00,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-03-20 17:46:00,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:00,649 INFO L225 Difference]: With dead ends: 35 [2022-03-20 17:46:00,649 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 17:46:00,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:46:00,651 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:00,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 50 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 17:46:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 17:46:00,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-03-20 17:46:00,661 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2022-03-20 17:46:00,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:00,661 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-03-20 17:46:00,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:46:00,661 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-03-20 17:46:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 17:46:00,662 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:00,662 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 17:46:00,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:46:00,662 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:00,663 INFO L85 PathProgramCache]: Analyzing trace with hash -349450775, now seen corresponding path program 1 times [2022-03-20 17:46:00,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:00,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1034087304] [2022-03-20 17:46:00,663 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:46:00,663 INFO L85 PathProgramCache]: Analyzing trace with hash -349450775, now seen corresponding path program 2 times [2022-03-20 17:46:00,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:00,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117829895] [2022-03-20 17:46:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:00,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:46:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:46:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,901 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 17:46:00,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:00,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117829895] [2022-03-20 17:46:00,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117829895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:00,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:00,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:00,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:00,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1034087304] [2022-03-20 17:46:00,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1034087304] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:00,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:00,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:00,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85056692] [2022-03-20 17:46:00,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:00,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:46:00,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:00,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:46:00,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:46:00,905 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 17:46:03,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:46:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:03,333 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-03-20 17:46:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:46:03,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-03-20 17:46:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:03,334 INFO L225 Difference]: With dead ends: 40 [2022-03-20 17:46:03,334 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 17:46:03,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:46:03,335 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:03,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 38 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 89 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 17:46:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 17:46:03,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-20 17:46:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-20 17:46:03,347 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2022-03-20 17:46:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:03,347 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-20 17:46:03,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 17:46:03,347 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-20 17:46:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:46:03,348 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:03,348 INFO L499 BasicCegarLoop]: trace histogram [2, 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] [2022-03-20 17:46:03,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 17:46:03,348 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:03,349 INFO L85 PathProgramCache]: Analyzing trace with hash 33102019, now seen corresponding path program 1 times [2022-03-20 17:46:03,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:03,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027095144] [2022-03-20 17:46:03,359 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:03,359 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:03,359 INFO L85 PathProgramCache]: Analyzing trace with hash 33102019, now seen corresponding path program 2 times [2022-03-20 17:46:03,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:03,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594383479] [2022-03-20 17:46:03,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:03,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:46:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:46:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:03,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:03,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594383479] [2022-03-20 17:46:03,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594383479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:03,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:03,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:03,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:03,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1027095144] [2022-03-20 17:46:03,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1027095144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:03,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:03,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:03,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991561871] [2022-03-20 17:46:03,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:03,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:46:03,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:03,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:46:03,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:46:03,485 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:46:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:03,643 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-03-20 17:46:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:46:03,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-03-20 17:46:03,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:03,645 INFO L225 Difference]: With dead ends: 50 [2022-03-20 17:46:03,645 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 17:46:03,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:46:03,646 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:03,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 31 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 17:46:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-03-20 17:46:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-20 17:46:03,654 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 29 [2022-03-20 17:46:03,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:03,655 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-20 17:46:03,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:46:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-20 17:46:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:46:03,655 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:03,656 INFO L499 BasicCegarLoop]: trace histogram [2, 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] [2022-03-20 17:46:03,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 17:46:03,656 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash 291267457, now seen corresponding path program 1 times [2022-03-20 17:46:03,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:03,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1773478497] [2022-03-20 17:46:03,658 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:03,658 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:03,658 INFO L85 PathProgramCache]: Analyzing trace with hash 291267457, now seen corresponding path program 2 times [2022-03-20 17:46:03,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:03,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69145867] [2022-03-20 17:46:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:03,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:46:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:46:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:03,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:03,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69145867] [2022-03-20 17:46:03,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69145867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:03,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145935359] [2022-03-20 17:46:03,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:03,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:03,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:03,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:03,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process