/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-crafted-1/sum_by_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:52:00,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:52:00,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:52:00,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:52:00,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:52:00,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:52:00,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:52:00,663 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 20:52:00,671 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:52:00,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:52:00,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:52:00,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:52:00,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:52:00,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:52:00,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:52:00,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:52:00,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:52:00,673 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:52:00,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:52:00,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:52:00,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:52:00,674 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:52:00,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:52:00,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:52:00,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:52:00,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:52:00,674 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:52:00,674 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:52:00,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:52:00,674 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:52:00,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:52:00,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:52:00,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:52:00,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:52:00,865 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:52:00,870 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:52:00,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sum_by_3.c [2022-04-06 20:52:00,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ffe0099/f492a35999034df7a7e4b9ad39db96d5/FLAG5961b37b2 [2022-04-06 20:52:01,270 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:52:01,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sum_by_3.c [2022-04-06 20:52:01,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ffe0099/f492a35999034df7a7e4b9ad39db96d5/FLAG5961b37b2 [2022-04-06 20:52:01,285 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ffe0099/f492a35999034df7a7e4b9ad39db96d5 [2022-04-06 20:52:01,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:52:01,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:52:01,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:52:01,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:52:01,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:52:01,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:52:01" (1/1) ... [2022-04-06 20:52:01,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e8ac47a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:52:01, skipping insertion in model container [2022-04-06 20:52:01,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:52:01" (1/1) ... [2022-04-06 20:52:01,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:52:01,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:52:01,468 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-crafted-1/sum_by_3.c[406,419] [2022-04-06 20:52:01,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:52:01,485 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:52:01,492 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-crafted-1/sum_by_3.c[406,419] [2022-04-06 20:52:01,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:52:01,504 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:52:01,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:52:01 WrapperNode [2022-04-06 20:52:01,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:52:01,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:52:01,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:52:01,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:52:01,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:52:01" (1/1) ... [2022-04-06 20:52:01,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:52:01" (1/1) ... [2022-04-06 20:52:01,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:52:01" (1/1) ... [2022-04-06 20:52:01,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:52:01" (1/1) ... [2022-04-06 20:52:01,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:52:01" (1/1) ... [2022-04-06 20:52:01,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:52:01" (1/1) ... [2022-04-06 20:52:01,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:52:01" (1/1) ... [2022-04-06 20:52:01,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:52:01,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:52:01,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:52:01,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:52:01,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:52:01" (1/1) ... [2022-04-06 20:52:01,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:52:01,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:01,541 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 20:52:01,546 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 20:52:01,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:52:01,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:52:01,568 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:52:01,568 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 20:52:01,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:52:01,568 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:52:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:52:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:52:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:52:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:52:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 20:52:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:52:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 20:52:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:52:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:52:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:52:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:52:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:52:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:52:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:52:01,610 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:52:01,611 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:52:01,697 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:52:01,702 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:52:01,702 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 20:52:01,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:52:01 BoogieIcfgContainer [2022-04-06 20:52:01,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:52:01,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:52:01,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:52:01,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:52:01,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:52:01" (1/3) ... [2022-04-06 20:52:01,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5be612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:52:01, skipping insertion in model container [2022-04-06 20:52:01,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:52:01" (2/3) ... [2022-04-06 20:52:01,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5be612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:52:01, skipping insertion in model container [2022-04-06 20:52:01,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:52:01" (3/3) ... [2022-04-06 20:52:01,735 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_by_3.c [2022-04-06 20:52:01,740 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:52:01,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:52:01,769 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:52:01,773 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 20:52:01,774 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:52:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 20:52:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:52:01,794 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:01,795 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:01,795 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:01,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:01,799 INFO L85 PathProgramCache]: Analyzing trace with hash 963326671, now seen corresponding path program 1 times [2022-04-06 20:52:01,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:01,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1637150391] [2022-04-06 20:52:01,811 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:52:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash 963326671, now seen corresponding path program 2 times [2022-04-06 20:52:01,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:01,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062506915] [2022-04-06 20:52:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:01,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:01,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,002 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 20:52:02,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:02,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062506915] [2022-04-06 20:52:02,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062506915] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:02,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:02,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:52:02,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:02,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1637150391] [2022-04-06 20:52:02,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1637150391] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:02,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:02,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:52:02,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837550166] [2022-04-06 20:52:02,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:02,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:52:02,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:02,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:52:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:52:02,037 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 20:52:02,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:02,092 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-04-06 20:52:02,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:52:02,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2022-04-06 20:52:02,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:02,099 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:52:02,099 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:52:02,101 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 20:52:02,104 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:02,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:52:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:52:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:52:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 20:52:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 20:52:02,134 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2022-04-06 20:52:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:02,134 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 20:52:02,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 20:52:02,135 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 20:52:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:52:02,136 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:02,136 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:02,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:52:02,136 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:02,138 INFO L85 PathProgramCache]: Analyzing trace with hash 959632587, now seen corresponding path program 1 times [2022-04-06 20:52:02,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:02,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2124444302] [2022-04-06 20:52:02,139 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:52:02,139 INFO L85 PathProgramCache]: Analyzing trace with hash 959632587, now seen corresponding path program 2 times [2022-04-06 20:52:02,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:02,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454618096] [2022-04-06 20:52:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:02,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,586 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 20:52:02,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:02,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454618096] [2022-04-06 20:52:02,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454618096] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:02,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:02,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:52:02,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:02,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2124444302] [2022-04-06 20:52:02,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2124444302] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:02,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:02,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:52:02,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673230674] [2022-04-06 20:52:02,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:02,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:52:02,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:52:02,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:52:02,590 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 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 20:52:02,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:02,794 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-04-06 20:52:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:52:02,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 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) Word has length 16 [2022-04-06 20:52:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:02,796 INFO L225 Difference]: With dead ends: 33 [2022-04-06 20:52:02,796 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 20:52:02,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:52:02,797 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:02,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 20:52:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-04-06 20:52:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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 20:52:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-04-06 20:52:02,804 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2022-04-06 20:52:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:02,804 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-04-06 20:52:02,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 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 20:52:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-04-06 20:52:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:52:02,805 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:02,805 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:02,805 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:52:02,805 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:02,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:02,806 INFO L85 PathProgramCache]: Analyzing trace with hash -281665776, now seen corresponding path program 1 times [2022-04-06 20:52:02,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:02,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [827798827] [2022-04-06 20:52:02,823 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:02,823 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:02,823 INFO L85 PathProgramCache]: Analyzing trace with hash -281665776, now seen corresponding path program 2 times [2022-04-06 20:52:02,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:02,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391142448] [2022-04-06 20:52:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:02,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:02,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:02,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391142448] [2022-04-06 20:52:02,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391142448] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:02,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:02,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:52:02,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:02,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [827798827] [2022-04-06 20:52:02,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [827798827] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:02,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:02,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:52:02,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932376310] [2022-04-06 20:52:02,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:02,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:52:02,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:02,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:52:02,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:52:02,934 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 20:52:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:02,986 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-04-06 20:52:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:52:02,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 20:52:02,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:02,987 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:52:02,987 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 20:52:02,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:52:02,990 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:02,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:52:02,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 20:52:03,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-06 20:52:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 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 20:52:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-04-06 20:52:03,002 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2022-04-06 20:52:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:03,002 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-04-06 20:52:03,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 20:52:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-04-06 20:52:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:52:03,005 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:03,005 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:03,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:52:03,005 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:03,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1916237745, now seen corresponding path program 1 times [2022-04-06 20:52:03,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:03,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1226898087] [2022-04-06 20:52:03,007 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:03,007 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:03,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1916237745, now seen corresponding path program 2 times [2022-04-06 20:52:03,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:03,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70496404] [2022-04-06 20:52:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:03,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:03,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:03,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:03,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70496404] [2022-04-06 20:52:03,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70496404] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:03,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:03,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:52:03,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:03,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1226898087] [2022-04-06 20:52:03,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1226898087] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:03,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:03,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:52:03,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230668543] [2022-04-06 20:52:03,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:03,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:52:03,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:03,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:52:03,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:52:03,102 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 20:52:03,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:03,149 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-04-06 20:52:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:52:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 20:52:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:03,150 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:52:03,150 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 20:52:03,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:52:03,155 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:03,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:52:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 20:52:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 20:52:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 20:52:03,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-04-06 20:52:03,163 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 17 [2022-04-06 20:52:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:03,163 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-04-06 20:52:03,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 20:52:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-04-06 20:52:03,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:52:03,164 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:03,164 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:03,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 20:52:03,164 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:03,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:03,164 INFO L85 PathProgramCache]: Analyzing trace with hash 977611794, now seen corresponding path program 1 times [2022-04-06 20:52:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:03,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1817710421] [2022-04-06 20:52:03,165 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:03,165 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:03,166 INFO L85 PathProgramCache]: Analyzing trace with hash 977611794, now seen corresponding path program 2 times [2022-04-06 20:52:03,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:03,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553806997] [2022-04-06 20:52:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:03,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:03,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:03,625 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 20:52:03,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553806997] [2022-04-06 20:52:03,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553806997] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:03,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727007932] [2022-04-06 20:52:03,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:03,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:03,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:03,627 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 20:52:03,632 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 20:52:03,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:03,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:03,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:52:03,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:04,075 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 20:52:04,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:21,011 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~i~0 4294967296))) (or (<= (mod (div (mod (+ (* .cse0 2) c_main_~i~0) 4294967296) 3) 4294967296) (mod c_~SIZE~0 4294967296)) (< .cse0 (mod c_main_~n~0 4294967296)))) is different from true [2022-04-06 20:52:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-04-06 20:52:35,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727007932] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:35,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:35,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2022-04-06 20:52:35,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:35,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1817710421] [2022-04-06 20:52:35,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1817710421] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:35,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:35,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:52:35,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455802896] [2022-04-06 20:52:35,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:35,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:52:35,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:35,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:52:35,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=336, Unknown=7, NotChecked=38, Total=462 [2022-04-06 20:52:35,896 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 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 20:52:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:38,423 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-04-06 20:52:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:52:38,424 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 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) Word has length 17 [2022-04-06 20:52:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:38,424 INFO L225 Difference]: With dead ends: 32 [2022-04-06 20:52:38,424 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 20:52:38,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=147, Invalid=605, Unknown=8, NotChecked=52, Total=812 [2022-04-06 20:52:38,425 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:38,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 29 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 20:52:38,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-04-06 20:52:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 20:52:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-04-06 20:52:38,429 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-04-06 20:52:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:38,429 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-04-06 20:52:38,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 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 20:52:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-04-06 20:52:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:52:38,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:38,430 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:38,438 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 20:52:38,630 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:38,631 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:38,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:38,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1821374134, now seen corresponding path program 1 times [2022-04-06 20:52:38,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:38,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2143436742] [2022-04-06 20:52:38,632 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:38,632 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:38,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1821374134, now seen corresponding path program 2 times [2022-04-06 20:52:38,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:38,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436567403] [2022-04-06 20:52:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:38,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:38,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:38,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436567403] [2022-04-06 20:52:38,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436567403] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:38,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99711904] [2022-04-06 20:52:38,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:38,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:38,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:38,756 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 20:52:38,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process