/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-04 19:20:19,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-04 19:20:19,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-04 19:20:19,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-04 19:20:20,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-04-04 19:20:20,041 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-04 19:20:20,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-04 19:20:20,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-04 19:20:20,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-04 19:20:20,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-04 19:20:20,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-04 19:20:20,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-04 19:20:20,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-04 19:20:20,043 INFO L138 SettingsManager]: * Use SBE=true [2022-04-04 19:20:20,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-04 19:20:20,044 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-04 19:20:20,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-04 19:20:20,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-04 19:20:20,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-04 19:20:20,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-04 19:20:20,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-04 19:20:20,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-04 19:20:20,045 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-04 19:20:20,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-04 19:20:20,045 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-04 19:20:20,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-04 19:20:20,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-04 19:20:20,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-04 19:20:20,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-04 19:20:20,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 19:20:20,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-04 19:20:20,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-04 19:20:20,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-04 19:20:20,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-04 19:20:20,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-04 19:20:20,047 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-04 19:20:20,047 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-04 19:20:20,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-04 19:20:20,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-04 19:20:20,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-04 19:20:20,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-04 19:20:20,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-04 19:20:20,341 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-04 19:20:20,342 INFO L275 PluginConnector]: CDTParser initialized [2022-04-04 19:20:20,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2022-04-04 19:20:20,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fba22438/03a6b86654d04d5d871bc7881b9d35a4/FLAG870eafcd4 [2022-04-04 19:20:20,820 INFO L306 CDTParser]: Found 1 translation units. [2022-04-04 19:20:20,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2022-04-04 19:20:20,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fba22438/03a6b86654d04d5d871bc7881b9d35a4/FLAG870eafcd4 [2022-04-04 19:20:20,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fba22438/03a6b86654d04d5d871bc7881b9d35a4 [2022-04-04 19:20:20,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-04 19:20:20,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-04 19:20:20,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-04 19:20:20,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-04 19:20:20,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-04 19:20:20,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 07:20:20" (1/1) ... [2022-04-04 19:20:20,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f054131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:20, skipping insertion in model container [2022-04-04 19:20:20,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 07:20:20" (1/1) ... [2022-04-04 19:20:20,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-04 19:20:20,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-04 19:20:21,053 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i[834,847] [2022-04-04 19:20:21,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 19:20:21,077 INFO L203 MainTranslator]: Completed pre-run [2022-04-04 19:20:21,093 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i[834,847] [2022-04-04 19:20:21,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 19:20:21,115 INFO L208 MainTranslator]: Completed translation [2022-04-04 19:20:21,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:21 WrapperNode [2022-04-04 19:20:21,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-04 19:20:21,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-04 19:20:21,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-04 19:20:21,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-04 19:20:21,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:21" (1/1) ... [2022-04-04 19:20:21,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:21" (1/1) ... [2022-04-04 19:20:21,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:21" (1/1) ... [2022-04-04 19:20:21,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:21" (1/1) ... [2022-04-04 19:20:21,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:21" (1/1) ... [2022-04-04 19:20:21,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:21" (1/1) ... [2022-04-04 19:20:21,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:21" (1/1) ... [2022-04-04 19:20:21,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-04 19:20:21,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-04 19:20:21,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-04 19:20:21,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-04 19:20:21,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:21" (1/1) ... [2022-04-04 19:20:21,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 19:20:21,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:20:21,196 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) [2022-04-04 19:20:21,223 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 [2022-04-04 19:20:21,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-04 19:20:21,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-04 19:20:21,244 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-04 19:20:21,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-04 19:20:21,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-04 19:20:21,245 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-04 19:20:21,245 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-04 19:20:21,245 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-04 19:20:21,245 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-04 19:20:21,245 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-04 19:20:21,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-04 19:20:21,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-04 19:20:21,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-04 19:20:21,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-04 19:20:21,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-04 19:20:21,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-04 19:20:21,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-04 19:20:21,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-04 19:20:21,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-04 19:20:21,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-04 19:20:21,320 INFO L234 CfgBuilder]: Building ICFG [2022-04-04 19:20:21,322 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-04 19:20:21,441 INFO L275 CfgBuilder]: Performing block encoding [2022-04-04 19:20:21,446 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-04 19:20:21,446 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-04 19:20:21,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 07:20:21 BoogieIcfgContainer [2022-04-04 19:20:21,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-04 19:20:21,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-04 19:20:21,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-04 19:20:21,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-04 19:20:21,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.04 07:20:20" (1/3) ... [2022-04-04 19:20:21,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1696d619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 07:20:21, skipping insertion in model container [2022-04-04 19:20:21,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:21" (2/3) ... [2022-04-04 19:20:21,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1696d619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 07:20:21, skipping insertion in model container [2022-04-04 19:20:21,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 07:20:21" (3/3) ... [2022-04-04 19:20:21,455 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2022-04-04 19:20:21,459 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-04 19:20:21,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-04 19:20:21,496 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-04 19:20:21,502 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-04-04 19:20:21,503 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-04 19:20:21,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 19:20:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-04 19:20:21,520 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:21,520 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:21,521 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:21,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash 56847072, now seen corresponding path program 1 times [2022-04-04 19:20:21,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:21,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357165294] [2022-04-04 19:20:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:21,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:21,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:21,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:21,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357165294] [2022-04-04 19:20:21,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357165294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 19:20:21,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 19:20:21,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-04 19:20:21,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746408281] [2022-04-04 19:20:21,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 19:20:21,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-04 19:20:21,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:20:21,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-04 19:20:21,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-04 19:20:21,796 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-04-04 19:20:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:20:21,857 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-04-04 19:20:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-04 19:20:21,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 14 [2022-04-04 19:20:21,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:20:21,866 INFO L225 Difference]: With dead ends: 46 [2022-04-04 19:20:21,866 INFO L226 Difference]: Without dead ends: 22 [2022-04-04 19:20:21,870 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 [2022-04-04 19:20:21,875 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 19:20:21,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 19:20:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-04 19:20:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-04 19:20:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-04 19:20:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-04-04 19:20:21,909 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-04-04 19:20:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:20:21,909 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-04-04 19:20:21,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-04-04 19:20:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-04-04 19:20:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-04 19:20:21,910 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:21,910 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:21,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-04 19:20:21,912 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1810080346, now seen corresponding path program 1 times [2022-04-04 19:20:21,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:21,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845498406] [2022-04-04 19:20:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:21,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:22,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:22,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:22,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845498406] [2022-04-04 19:20:22,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845498406] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 19:20:22,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 19:20:22,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-04 19:20:22,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139618143] [2022-04-04 19:20:22,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 19:20:22,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-04 19:20:22,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:20:22,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-04 19:20:22,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-04 19:20:22,066 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-04-04 19:20:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:20:22,149 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-04-04 19:20:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-04 19:20:22,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-04-04 19:20:22,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:20:22,152 INFO L225 Difference]: With dead ends: 43 [2022-04-04 19:20:22,152 INFO L226 Difference]: Without dead ends: 29 [2022-04-04 19:20:22,155 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 [2022-04-04 19:20:22,156 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 19:20:22,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 25 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 19:20:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-04 19:20:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-04-04 19:20:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-04 19:20:22,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-04 19:20:22,168 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-04-04 19:20:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:20:22,171 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-04 19:20:22,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-04-04 19:20:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-04 19:20:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-04 19:20:22,172 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:22,172 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:22,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-04 19:20:22,173 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:22,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1733475192, now seen corresponding path program 1 times [2022-04-04 19:20:22,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:22,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548068829] [2022-04-04 19:20:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:22,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:22,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:22,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:22,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548068829] [2022-04-04 19:20:22,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548068829] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:20:22,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408903109] [2022-04-04 19:20:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:22,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:20:22,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:20:22,304 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) [2022-04-04 19:20:22,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-04 19:20:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:22,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-04 19:20:22,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:20:22,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-04-04 19:20:22,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-04-04 19:20:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:22,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:20:22,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-04-04 19:20:22,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-04-04 19:20:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:23,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408903109] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 19:20:23,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-04 19:20:23,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 9] total 15 [2022-04-04 19:20:23,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365413843] [2022-04-04 19:20:23,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-04 19:20:23,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-04 19:20:23,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:20:23,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-04 19:20:23,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-04 19:20:23,091 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-04 19:20:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:20:23,502 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-04-04 19:20:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-04 19:20:23,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-04 19:20:23,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:20:23,503 INFO L225 Difference]: With dead ends: 57 [2022-04-04 19:20:23,503 INFO L226 Difference]: Without dead ends: 41 [2022-04-04 19:20:23,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-04-04 19:20:23,505 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-04 19:20:23,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 55 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-04 19:20:23,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-04 19:20:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-04-04 19:20:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 19:20:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-04-04 19:20:23,517 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2022-04-04 19:20:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:20:23,517 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-04-04 19:20:23,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-04 19:20:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-04-04 19:20:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-04 19:20:23,519 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:23,520 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:23,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-04 19:20:23,732 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 [2022-04-04 19:20:23,732 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:23,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2014289623, now seen corresponding path program 1 times [2022-04-04 19:20:23,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:23,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093189711] [2022-04-04 19:20:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:23,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:23,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:23,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-04 19:20:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-04 19:20:23,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:23,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093189711] [2022-04-04 19:20:23,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093189711] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:20:23,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982673438] [2022-04-04 19:20:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:23,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:20:23,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:20:23,854 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) [2022-04-04 19:20:23,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-04 19:20:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:23,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-04 19:20:23,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:20:23,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-04-04 19:20:25,151 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-04-04 19:20:25,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 10 [2022-04-04 19:20:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:25,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:20:25,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-04-04 19:20:25,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2022-04-04 19:20:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:25,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982673438] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 19:20:25,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-04 19:20:25,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 20 [2022-04-04 19:20:25,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711574592] [2022-04-04 19:20:25,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-04 19:20:25,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-04 19:20:25,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:20:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-04 19:20:25,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-04-04 19:20:25,678 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 20 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 19:20:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:20:27,184 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2022-04-04 19:20:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-04 19:20:27,185 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2022-04-04 19:20:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:20:27,186 INFO L225 Difference]: With dead ends: 103 [2022-04-04 19:20:27,186 INFO L226 Difference]: Without dead ends: 78 [2022-04-04 19:20:27,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2022-04-04 19:20:27,189 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-04 19:20:27,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 80 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 410 Invalid, 0 Unknown, 135 Unchecked, 0.4s Time] [2022-04-04 19:20:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-04 19:20:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 46. [2022-04-04 19:20:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-04 19:20:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-04-04 19:20:27,201 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 27 [2022-04-04 19:20:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:20:27,201 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-04-04 19:20:27,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 19:20:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-04-04 19:20:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-04 19:20:27,202 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:27,203 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:27,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-04 19:20:27,419 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 [2022-04-04 19:20:27,420 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:27,420 INFO L85 PathProgramCache]: Analyzing trace with hash 108033845, now seen corresponding path program 2 times [2022-04-04 19:20:27,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:27,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363093837] [2022-04-04 19:20:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:27,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:27,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:27,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-04 19:20:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-04 19:20:27,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:27,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363093837] [2022-04-04 19:20:27,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363093837] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:20:27,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415166416] [2022-04-04 19:20:27,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-04 19:20:27,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:20:27,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:20:27,524 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) [2022-04-04 19:20:27,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-04 19:20:27,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-04 19:20:27,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 19:20:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-04 19:20:27,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:20:27,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-04-04 19:20:27,691 INFO L356 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2022-04-04 19:20:27,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-04-04 19:20:29,092 INFO L356 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2022-04-04 19:20:29,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 38 [2022-04-04 19:20:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:29,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:20:29,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-04-04 19:20:29,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 262 [2022-04-04 19:20:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:29,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415166416] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 19:20:29,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-04 19:20:29,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 13] total 24 [2022-04-04 19:20:29,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772132520] [2022-04-04 19:20:29,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-04 19:20:29,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-04 19:20:29,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:20:29,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-04 19:20:29,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-04-04 19:20:29,818 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 24 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 19:20:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:20:31,457 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2022-04-04 19:20:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-04 19:20:31,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-04-04 19:20:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:20:31,460 INFO L225 Difference]: With dead ends: 129 [2022-04-04 19:20:31,460 INFO L226 Difference]: Without dead ends: 96 [2022-04-04 19:20:31,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2022-04-04 19:20:31,462 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 87 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-04 19:20:31,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 102 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 433 Invalid, 0 Unknown, 345 Unchecked, 0.5s Time] [2022-04-04 19:20:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-04 19:20:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 70. [2022-04-04 19:20:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 56 states have internal predecessors, (61), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-04 19:20:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-04-04 19:20:31,479 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 29 [2022-04-04 19:20:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:20:31,479 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-04-04 19:20:31,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 19:20:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-04-04 19:20:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-04 19:20:31,480 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:31,480 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:31,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-04 19:20:31,689 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 [2022-04-04 19:20:31,690 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash -950130319, now seen corresponding path program 3 times [2022-04-04 19:20:31,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:31,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978845152] [2022-04-04 19:20:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:31,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:31,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:31,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-04 19:20:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-04 19:20:31,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978845152] [2022-04-04 19:20:31,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978845152] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:20:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133216408] [2022-04-04 19:20:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-04 19:20:31,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:20:31,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:20:31,808 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) [2022-04-04 19:20:31,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-04 19:20:31,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-04 19:20:31,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 19:20:31,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-04 19:20:31,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:20:31,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-04-04 19:20:32,017 INFO L356 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2022-04-04 19:20:32,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-04-04 19:20:32,067 INFO L356 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2022-04-04 19:20:32,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2022-04-04 19:20:32,122 INFO L356 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2022-04-04 19:20:32,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-04-04 19:20:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 19:20:32,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:20:33,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-04-04 19:20:33,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 262 [2022-04-04 19:20:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:33,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133216408] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 19:20:33,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-04 19:20:33,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 17] total 29 [2022-04-04 19:20:33,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136870303] [2022-04-04 19:20:33,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-04 19:20:33,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-04 19:20:33,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:20:33,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-04 19:20:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2022-04-04 19:20:33,240 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-04 19:20:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:20:39,146 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2022-04-04 19:20:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-04 19:20:39,150 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2022-04-04 19:20:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:20:39,151 INFO L225 Difference]: With dead ends: 157 [2022-04-04 19:20:39,151 INFO L226 Difference]: Without dead ends: 104 [2022-04-04 19:20:39,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1107, Invalid=3863, Unknown=0, NotChecked=0, Total=4970 [2022-04-04 19:20:39,155 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 255 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-04 19:20:39,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 96 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 685 Invalid, 0 Unknown, 159 Unchecked, 1.2s Time] [2022-04-04 19:20:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-04 19:20:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2022-04-04 19:20:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.09375) internal successors, (70), 66 states have internal predecessors, (70), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-04 19:20:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2022-04-04 19:20:39,173 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 33 [2022-04-04 19:20:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:20:39,173 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2022-04-04 19:20:39,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-04 19:20:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2022-04-04 19:20:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-04 19:20:39,174 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:39,174 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:39,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-04 19:20:39,387 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 [2022-04-04 19:20:39,387 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1012384462, now seen corresponding path program 1 times [2022-04-04 19:20:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:39,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979333151] [2022-04-04 19:20:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:39,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:39,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-04 19:20:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:39,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-04 19:20:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-04 19:20:39,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:39,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979333151] [2022-04-04 19:20:39,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979333151] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:20:39,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253655427] [2022-04-04 19:20:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:39,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:20:39,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:20:39,571 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) [2022-04-04 19:20:39,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-04 19:20:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:39,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-04 19:20:39,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:20:39,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-04-04 19:20:39,733 INFO L356 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2022-04-04 19:20:39,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2022-04-04 19:20:39,797 INFO L356 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2022-04-04 19:20:39,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-04-04 19:20:39,882 INFO L356 Elim1Store]: treesize reduction 158, result has 16.8 percent of original size [2022-04-04 19:20:39,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 58 [2022-04-04 19:20:39,965 INFO L356 Elim1Store]: treesize reduction 158, result has 16.8 percent of original size [2022-04-04 19:20:39,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 56 [2022-04-04 19:20:40,042 INFO L356 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2022-04-04 19:20:40,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2022-04-04 19:20:40,506 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-04-04 19:20:40,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2022-04-04 19:20:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-04 19:20:40,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:20:46,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 248 [2022-04-04 19:20:47,129 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-04-04 19:20:47,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174867544 treesize of output 174343240 [2022-04-04 19:25:11,675 WARN L232 SmtUtils]: Spent 4.41m on a formula simplification that was a NOOP. DAG size: 2946 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)