/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/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:31:59,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:31:59,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:31:59,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:31:59,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:31:59,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:32:00,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:32:00,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:32:00,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:32:00,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:32:00,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:32:00,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:32:00,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:32:00,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:32:00,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:32:00,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:32:00,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:32:00,018 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:32:00,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:32:00,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:32:00,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:32:00,019 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:32:00,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:32:00,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:32:00,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:32:00,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:32:00,019 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:32:00,019 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:32:00,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:32:00,020 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:32:00,020 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:32:00,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:32:00,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:32:00,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:32:00,313 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:32:00,314 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:32:00,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2022-04-06 19:32:00,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a80460c8e/f6e73a2aa451435898699a0bce9f9680/FLAG57b737604 [2022-04-06 19:32:00,826 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:32:00,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2022-04-06 19:32:00,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a80460c8e/f6e73a2aa451435898699a0bce9f9680/FLAG57b737604 [2022-04-06 19:32:01,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a80460c8e/f6e73a2aa451435898699a0bce9f9680 [2022-04-06 19:32:01,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:32:01,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:32:01,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:32:01,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:32:01,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:32:01,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:32:01" (1/1) ... [2022-04-06 19:32:01,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7613f533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:01, skipping insertion in model container [2022-04-06 19:32:01,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:32:01" (1/1) ... [2022-04-06 19:32:01,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:32:01,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:32:01,442 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/sum04-2.i[808,821] [2022-04-06 19:32:01,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:32:01,460 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:32:01,469 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/sum04-2.i[808,821] [2022-04-06 19:32:01,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:32:01,483 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:32:01,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:01 WrapperNode [2022-04-06 19:32:01,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:32:01,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:32:01,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:32:01,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:32:01,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:01" (1/1) ... [2022-04-06 19:32:01,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:01" (1/1) ... [2022-04-06 19:32:01,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:01" (1/1) ... [2022-04-06 19:32:01,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:01" (1/1) ... [2022-04-06 19:32:01,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:01" (1/1) ... [2022-04-06 19:32:01,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:01" (1/1) ... [2022-04-06 19:32:01,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:01" (1/1) ... [2022-04-06 19:32:01,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:32:01,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:32:01,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:32:01,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:32:01,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:01" (1/1) ... [2022-04-06 19:32:01,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:32:01,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:01,545 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) [2022-04-06 19:32:01,557 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 [2022-04-06 19:32:01,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:32:01,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:32:01,584 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:32:01,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:32:01,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:32:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:32:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:32:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 19:32:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 19:32:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:32:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:32:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:32:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:32:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:32:01,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:32:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:32:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:32:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:32:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:32:01,651 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:32:01,653 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:32:01,746 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:32:01,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:32:01,751 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 19:32:01,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:32:01 BoogieIcfgContainer [2022-04-06 19:32:01,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:32:01,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:32:01,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:32:01,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:32:01,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:32:01" (1/3) ... [2022-04-06 19:32:01,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641cdab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:32:01, skipping insertion in model container [2022-04-06 19:32:01,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:01" (2/3) ... [2022-04-06 19:32:01,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641cdab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:32:01, skipping insertion in model container [2022-04-06 19:32:01,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:32:01" (3/3) ... [2022-04-06 19:32:01,788 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2022-04-06 19:32:01,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:32:01,793 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:32:01,853 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:32:01,863 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 [2022-04-06 19:32:01,864 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:32:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:32:01,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:32:01,888 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:01,888 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:01,889 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:01,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:01,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1274873075, now seen corresponding path program 1 times [2022-04-06 19:32:01,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:01,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1149407133] [2022-04-06 19:32:01,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:32:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1274873075, now seen corresponding path program 2 times [2022-04-06 19:32:01,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:01,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866615888] [2022-04-06 19:32:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:01,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:02,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:02,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:02,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866615888] [2022-04-06 19:32:02,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866615888] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:02,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:02,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:32:02,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:02,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1149407133] [2022-04-06 19:32:02,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1149407133] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:02,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:02,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:32:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126098393] [2022-04-06 19:32:02,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:02,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:32:02,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:02,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:32:02,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:32:02,163 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:02,224 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-04-06 19:32:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:32:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 19:32:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:02,239 INFO L225 Difference]: With dead ends: 30 [2022-04-06 19:32:02,239 INFO L226 Difference]: Without dead ends: 13 [2022-04-06 19:32:02,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:32:02,246 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:02,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-06 19:32:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-06 19:32:02,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-04-06 19:32:02,282 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-04-06 19:32:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:02,283 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-04-06 19:32:02,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-04-06 19:32:02,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:32:02,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:02,284 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:02,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:32:02,285 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:02,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1280414201, now seen corresponding path program 1 times [2022-04-06 19:32:02,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:02,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [916011582] [2022-04-06 19:32:02,288 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:32:02,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1280414201, now seen corresponding path program 2 times [2022-04-06 19:32:02,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:02,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121367701] [2022-04-06 19:32:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:02,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:02,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:02,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:02,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121367701] [2022-04-06 19:32:02,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121367701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:02,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:02,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:32:02,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:02,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [916011582] [2022-04-06 19:32:02,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [916011582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:02,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:02,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:32:02,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223633230] [2022-04-06 19:32:02,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:02,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:32:02,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:02,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:32:02,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:32:02,396 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:02,444 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-04-06 19:32:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:32:02,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 19:32:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:02,446 INFO L225 Difference]: With dead ends: 20 [2022-04-06 19:32:02,446 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 19:32:02,446 INFO L912 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 [2022-04-06 19:32:02,449 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:02,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 19:32:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-04-06 19:32:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-06 19:32:02,466 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-04-06 19:32:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:02,466 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-06 19:32:02,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-06 19:32:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 19:32:02,467 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:02,467 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:02,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:32:02,468 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:02,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:02,468 INFO L85 PathProgramCache]: Analyzing trace with hash -985852763, now seen corresponding path program 1 times [2022-04-06 19:32:02,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:02,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1519334224] [2022-04-06 19:32:02,484 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:32:02,484 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash -985852763, now seen corresponding path program 2 times [2022-04-06 19:32:02,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:02,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014687076] [2022-04-06 19:32:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:02,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:02,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:02,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014687076] [2022-04-06 19:32:02,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014687076] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721913407] [2022-04-06 19:32:02,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:32:02,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:02,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:02,559 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) [2022-04-06 19:32:02,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 19:32:02,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:32:02,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 19:32:02,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:02,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:02,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721913407] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:02,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:02,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 19:32:02,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:02,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1519334224] [2022-04-06 19:32:02,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1519334224] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:02,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:02,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:32:02,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164952677] [2022-04-06 19:32:02,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:02,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:32:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:02,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:32:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:32:02,750 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:02,823 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-04-06 19:32:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:32:02,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 19:32:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:02,824 INFO L225 Difference]: With dead ends: 22 [2022-04-06 19:32:02,824 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 19:32:02,825 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:32:02,826 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:02,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 19:32:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-04-06 19:32:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-04-06 19:32:02,830 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2022-04-06 19:32:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:02,831 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-04-06 19:32:02,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-04-06 19:32:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 19:32:02,832 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:02,832 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:02,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:03,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:03,052 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:03,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1380152381, now seen corresponding path program 3 times [2022-04-06 19:32:03,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:03,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1392398188] [2022-04-06 19:32:03,055 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:32:03,055 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:03,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1380152381, now seen corresponding path program 4 times [2022-04-06 19:32:03,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:03,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602511003] [2022-04-06 19:32:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:03,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:03,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:03,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602511003] [2022-04-06 19:32:03,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602511003] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:03,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754391032] [2022-04-06 19:32:03,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:32:03,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:03,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:03,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:03,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 19:32:03,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:32:03,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:03,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:32:03,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:03,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:03,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754391032] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:03,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:03,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 19:32:03,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:03,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1392398188] [2022-04-06 19:32:03,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1392398188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:03,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:03,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:32:03,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556970138] [2022-04-06 19:32:03,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:03,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:32:03,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:03,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:32:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:32:03,257 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:03,305 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-04-06 19:32:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:32:03,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 19:32:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:03,306 INFO L225 Difference]: With dead ends: 24 [2022-04-06 19:32:03,306 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 19:32:03,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:32:03,308 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:03,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 19:32:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-04-06 19:32:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-04-06 19:32:03,313 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2022-04-06 19:32:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:03,313 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-04-06 19:32:03,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-04-06 19:32:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 19:32:03,314 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:03,314 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:03,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:03,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 19:32:03,528 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:03,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1950004065, now seen corresponding path program 5 times [2022-04-06 19:32:03,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:03,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [951851105] [2022-04-06 19:32:03,530 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:32:03,530 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1950004065, now seen corresponding path program 6 times [2022-04-06 19:32:03,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:03,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8258038] [2022-04-06 19:32:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:03,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:03,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:03,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:03,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8258038] [2022-04-06 19:32:03,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8258038] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:03,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500616327] [2022-04-06 19:32:03,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:32:03,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:03,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:03,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:03,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 19:32:03,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 19:32:03,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:32:03,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:03,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:03,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500616327] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:03,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:03,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 19:32:03,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:03,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [951851105] [2022-04-06 19:32:03,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [951851105] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:03,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:03,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:32:03,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257150889] [2022-04-06 19:32:03,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:03,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:32:03,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:03,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:32:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:32:03,788 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:03,841 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-04-06 19:32:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:32:03,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 19:32:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:03,842 INFO L225 Difference]: With dead ends: 26 [2022-04-06 19:32:03,842 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 19:32:03,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:32:03,844 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:03,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 19:32:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-04-06 19:32:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-04-06 19:32:03,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2022-04-06 19:32:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:03,849 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-04-06 19:32:03,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-04-06 19:32:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 19:32:03,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:03,850 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:03,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:04,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:04,074 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:04,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1815254145, now seen corresponding path program 7 times [2022-04-06 19:32:04,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:04,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [792627701] [2022-04-06 19:32:04,076 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:32:04,076 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1815254145, now seen corresponding path program 8 times [2022-04-06 19:32:04,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:04,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196701012] [2022-04-06 19:32:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:04,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:04,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:04,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:04,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196701012] [2022-04-06 19:32:04,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196701012] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:04,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082324854] [2022-04-06 19:32:04,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:32:04,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:04,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:04,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:04,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 19:32:04,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:32:04,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:04,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:32:04,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:04,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:04,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082324854] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:04,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:04,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-04-06 19:32:04,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:04,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [792627701] [2022-04-06 19:32:04,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [792627701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:04,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:04,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:32:04,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351378657] [2022-04-06 19:32:04,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:04,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:32:04,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:04,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:32:04,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:32:04,328 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:04,399 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-04-06 19:32:04,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:32:04,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 19:32:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:04,401 INFO L225 Difference]: With dead ends: 28 [2022-04-06 19:32:04,401 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 19:32:04,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:32:04,402 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:04,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 19:32:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-04-06 19:32:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-04-06 19:32:04,407 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2022-04-06 19:32:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:04,407 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-04-06 19:32:04,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-04-06 19:32:04,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 19:32:04,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:04,408 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:04,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:04,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:04,623 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:04,624 INFO L85 PathProgramCache]: Analyzing trace with hash 429036573, now seen corresponding path program 9 times [2022-04-06 19:32:04,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:04,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [580408192] [2022-04-06 19:32:04,626 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:32:04,626 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:04,626 INFO L85 PathProgramCache]: Analyzing trace with hash 429036573, now seen corresponding path program 10 times [2022-04-06 19:32:04,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:04,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463420264] [2022-04-06 19:32:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:04,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:04,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:04,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:04,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463420264] [2022-04-06 19:32:04,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463420264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:04,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953781416] [2022-04-06 19:32:04,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:32:04,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:04,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:04,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:04,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 19:32:04,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:32:04,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:04,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:32:04,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:04,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:04,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953781416] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:04,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:04,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-04-06 19:32:04,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:04,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [580408192] [2022-04-06 19:32:04,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [580408192] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:04,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:04,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:32:04,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92543216] [2022-04-06 19:32:04,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:04,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:32:04,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:32:04,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:32:04,854 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:04,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:04,941 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-04-06 19:32:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:32:04,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 19:32:04,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:04,942 INFO L225 Difference]: With dead ends: 30 [2022-04-06 19:32:04,942 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 19:32:04,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:32:04,943 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:04,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 19:32:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-04-06 19:32:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-04-06 19:32:04,949 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2022-04-06 19:32:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:04,949 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-04-06 19:32:04,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-04-06 19:32:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 19:32:04,950 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:04,950 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:04,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:05,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:05,172 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:05,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:05,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1118833979, now seen corresponding path program 11 times [2022-04-06 19:32:05,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:05,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1829407847] [2022-04-06 19:32:05,174 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:32:05,174 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:05,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1118833979, now seen corresponding path program 12 times [2022-04-06 19:32:05,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:05,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047688274] [2022-04-06 19:32:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:05,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:05,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:05,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:05,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047688274] [2022-04-06 19:32:05,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047688274] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:05,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786814001] [2022-04-06 19:32:05,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:32:05,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:05,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:05,268 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:05,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 19:32:05,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:32:05,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:05,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:32:05,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:05,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:05,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786814001] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:05,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:05,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-04-06 19:32:05,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:05,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1829407847] [2022-04-06 19:32:05,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1829407847] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:05,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:05,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:32:05,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007700522] [2022-04-06 19:32:05,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:05,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:32:05,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:05,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:32:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:32:05,441 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:05,549 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-04-06 19:32:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:32:05,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 19:32:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:05,550 INFO L225 Difference]: With dead ends: 32 [2022-04-06 19:32:05,550 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 19:32:05,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:32:05,551 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:05,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 33 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:05,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 19:32:05,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-06 19:32:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-04-06 19:32:05,557 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2022-04-06 19:32:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:05,558 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-04-06 19:32:05,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:05,558 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-04-06 19:32:05,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 19:32:05,558 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:05,558 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:05,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:05,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:05,772 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:05,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1705789735, now seen corresponding path program 13 times [2022-04-06 19:32:05,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:05,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1225041208] [2022-04-06 19:32:05,774 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:32:05,774 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:05,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1705789735, now seen corresponding path program 14 times [2022-04-06 19:32:05,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:05,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838645962] [2022-04-06 19:32:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:05,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:05,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:05,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:05,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838645962] [2022-04-06 19:32:05,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838645962] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:05,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111143786] [2022-04-06 19:32:05,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:32:05,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:05,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:05,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:05,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 19:32:05,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:32:05,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:05,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 19:32:05,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:05,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:06,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111143786] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:06,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:06,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 12 [2022-04-06 19:32:06,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:06,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1225041208] [2022-04-06 19:32:06,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1225041208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:06,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:06,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:32:06,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568399111] [2022-04-06 19:32:06,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:06,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:32:06,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:32:06,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:32:06,059 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:06,169 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-04-06 19:32:06,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:32:06,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 19:32:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:06,171 INFO L225 Difference]: With dead ends: 33 [2022-04-06 19:32:06,171 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 19:32:06,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:32:06,172 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:06,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 18 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 19:32:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 19:32:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-04-06 19:32:06,178 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2022-04-06 19:32:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:06,178 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-04-06 19:32:06,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-04-06 19:32:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 19:32:06,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:06,179 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:06,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:06,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:06,388 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1749847817, now seen corresponding path program 15 times [2022-04-06 19:32:06,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:06,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [736807611] [2022-04-06 19:32:06,389 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:32:06,389 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:06,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1749847817, now seen corresponding path program 16 times [2022-04-06 19:32:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:06,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164418580] [2022-04-06 19:32:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:06,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:06,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:06,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164418580] [2022-04-06 19:32:06,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164418580] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176750638] [2022-04-06 19:32:06,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:32:06,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:06,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:06,584 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:06,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 19:32:06,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:32:06,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:06,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:32:06,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:06,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:07,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176750638] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:07,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:07,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2022-04-06 19:32:07,096 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [736807611] [2022-04-06 19:32:07,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [736807611] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:07,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:07,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:32:07,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149015222] [2022-04-06 19:32:07,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:07,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:32:07,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:07,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:32:07,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:32:07,098 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:07,392 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-04-06 19:32:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:32:07,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 19:32:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:07,393 INFO L225 Difference]: With dead ends: 35 [2022-04-06 19:32:07,393 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 19:32:07,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:32:07,394 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:07,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 75 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:32:07,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 19:32:07,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 19:32:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-04-06 19:32:07,404 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2022-04-06 19:32:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:07,405 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-04-06 19:32:07,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-04-06 19:32:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 19:32:07,407 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:07,407 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:07,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:07,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 19:32:07,608 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1139991659, now seen corresponding path program 17 times [2022-04-06 19:32:07,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:07,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [877770093] [2022-04-06 19:32:07,610 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:32:07,610 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1139991659, now seen corresponding path program 18 times [2022-04-06 19:32:07,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:07,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011998522] [2022-04-06 19:32:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:07,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:07,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 66 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:07,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:07,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011998522] [2022-04-06 19:32:07,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011998522] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:07,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782044558] [2022-04-06 19:32:07,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:32:07,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:07,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:07,706 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:07,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 19:32:07,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:32:07,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:07,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:32:07,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:07,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:32:07,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782044558] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:07,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:32:07,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 13 [2022-04-06 19:32:07,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:07,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [877770093] [2022-04-06 19:32:07,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [877770093] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:07,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:07,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:32:07,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202434663] [2022-04-06 19:32:07,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:07,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:32:07,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:07,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:32:07,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:32:07,816 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:07,853 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-04-06 19:32:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:32:07,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 19:32:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:07,854 INFO L225 Difference]: With dead ends: 30 [2022-04-06 19:32:07,854 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 19:32:07,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:32:07,855 INFO L913 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:07,855 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 19:32:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 19:32:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 19:32:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 19:32:07,856 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-04-06 19:32:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:07,856 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 19:32:07,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 19:32:07,856 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 19:32:07,858 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 19:32:07,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:08,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:08,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 19:32:08,347 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-04-06 19:32:08,347 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-04-06 19:32:08,347 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-04-06 19:32:08,348 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 28) the Hoare annotation is: true [2022-04-06 19:32:08,348 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 28) the Hoare annotation is: true [2022-04-06 19:32:08,348 INFO L878 garLoopResultBuilder]: At program point L24-2(lines 24 26) the Hoare annotation is: (or (and (<= 8 main_~sn~0) (<= main_~i~0 4) (<= 4 main_~i~0) (<= main_~sn~0 8)) (and (<= 14 main_~sn~0) (<= main_~i~0 7) (<= main_~sn~0 14) (<= 7 main_~i~0)) (and (<= main_~sn~0 2) (= main_~i~0 1) (<= 2 main_~sn~0)) (and (<= 4 main_~sn~0) (<= 2 main_~i~0) (<= main_~sn~0 4) (<= main_~i~0 2)) (and (<= main_~i~0 5) (<= main_~sn~0 10) (<= 10 main_~sn~0) (<= 5 main_~i~0)) (and (<= main_~i~0 6) (<= 12 main_~sn~0) (<= 6 main_~i~0) (<= main_~sn~0 12)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (<= main_~sn~0 16) (<= 8 main_~i~0) (<= main_~i~0 8) (< 15 main_~sn~0))) [2022-04-06 19:32:08,348 INFO L878 garLoopResultBuilder]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (<= main_~sn~0 16) (<= 9 main_~i~0) (< 15 main_~sn~0)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= main_~i~0 4) (<= 4 main_~i~0)) (and (= main_~sn~0 0) (= main_~i~0 1)) (and (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12) (<= 7 main_~i~0)) (and (<= 14 main_~sn~0) (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~sn~0 14)) (and (<= main_~sn~0 10) (<= 10 main_~sn~0) (<= main_~i~0 6) (<= 6 main_~i~0)) (and (<= 4 main_~sn~0) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= main_~i~0 2) (<= 2 main_~sn~0)) (and (<= main_~i~0 5) (<= 8 main_~sn~0) (<= 5 main_~i~0) (<= main_~sn~0 8))) [2022-04-06 19:32:08,348 INFO L878 garLoopResultBuilder]: At program point L24-4(lines 24 26) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2022-04-06 19:32:08,348 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 28) the Hoare annotation is: true [2022-04-06 19:32:08,348 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 19:32:08,348 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 19:32:08,348 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 19:32:08,348 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 19:32:08,349 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 19:32:08,349 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 19:32:08,349 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 19:32:08,349 INFO L878 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 19:32:08,349 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-06 19:32:08,349 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2022-04-06 19:32:08,349 INFO L885 garLoopResultBuilder]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2022-04-06 19:32:08,349 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 19) the Hoare annotation is: true [2022-04-06 19:32:08,349 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 19:32:08,353 INFO L719 BasicCegarLoop]: Path program histogram: [18, 2, 2] [2022-04-06 19:32:08,355 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 19:32:08,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:32:08 BoogieIcfgContainer [2022-04-06 19:32:08,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 19:32:08,371 INFO L158 Benchmark]: Toolchain (without parser) took 7139.53ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 125.8MB in the beginning and 112.7MB in the end (delta: 13.1MB). Peak memory consumption was 93.9MB. Max. memory is 8.0GB. [2022-04-06 19:32:08,371 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 176.2MB. Free memory is still 141.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 19:32:08,371 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.42ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 125.6MB in the beginning and 189.0MB in the end (delta: -63.3MB). Peak memory consumption was 12.2MB. Max. memory is 8.0GB. [2022-04-06 19:32:08,371 INFO L158 Benchmark]: Boogie Preprocessor took 23.31ms. Allocated memory is still 211.8MB. Free memory was 189.0MB in the beginning and 187.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 19:32:08,372 INFO L158 Benchmark]: RCFGBuilder took 243.72ms. Allocated memory is still 211.8MB. Free memory was 187.6MB in the beginning and 177.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 19:32:08,372 INFO L158 Benchmark]: TraceAbstraction took 6602.00ms. Allocated memory is still 211.8MB. Free memory was 176.8MB in the beginning and 112.7MB in the end (delta: 64.1MB). Peak memory consumption was 109.6MB. Max. memory is 8.0GB. [2022-04-06 19:32:08,373 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 176.2MB. Free memory is still 141.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 251.42ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 125.6MB in the beginning and 189.0MB in the end (delta: -63.3MB). Peak memory consumption was 12.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.31ms. Allocated memory is still 211.8MB. Free memory was 189.0MB in the beginning and 187.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 243.72ms. Allocated memory is still 211.8MB. Free memory was 187.6MB in the beginning and 177.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 6602.00ms. Allocated memory is still 211.8MB. Free memory was 176.8MB in the beginning and 112.7MB in the end (delta: 64.1MB). Peak memory consumption was 109.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.5s, OverallIterations: 11, TraceHistogramMax: 9, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 156 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 155 mSDsluCounter, 301 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 171 mSDsCounter, 80 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 495 IncrementalHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 80 mSolverCounterUnsat, 130 mSDtfsCounter, 495 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 487 GetRequests, 336 SyntacticMatches, 3 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=10, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 79 PreInvPairs, 121 NumberOfFragments, 251 HoareAnnotationTreeSize, 79 FomulaSimplifications, 392 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 19 FomulaSimplificationsInter, 5 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((((((((sn <= 16 && 9 <= i) && 15 < sn) || (((6 <= sn && sn <= 6) && i <= 4) && 4 <= i)) || (sn == 0 && i == 1)) || (((i <= 7 && 12 <= sn) && sn <= 12) && 7 <= i)) || (((14 <= sn && 8 <= i) && i <= 8) && sn <= 14)) || (((sn <= 10 && 10 <= sn) && i <= 6) && 6 <= i)) || (((4 <= sn && sn <= 4) && 3 <= i) && i <= 3)) || (((2 <= i && sn <= 2) && i <= 2) && 2 <= sn)) || (((i <= 5 && 8 <= sn) && 5 <= i) && sn <= 8) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-04-06 19:32:08,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...