/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_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-05 23:40:26,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 23:40:26,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 23:40:26,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 23:40:26,879 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 [2022-04-05 23:40:26,914 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 23:40:26,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 23:40:26,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-05 23:40:26,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-05 23:40:26,915 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 23:40:26,915 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 23:40:26,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 23:40:26,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 23:40:26,916 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 23:40:26,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 23:40:26,917 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 23:40:26,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 23:40:26,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 23:40:26,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 23:40:26,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 23:40:26,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 23:40:26,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 23:40:26,918 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 23:40:26,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 23:40:26,920 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 23:40:26,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 23:40:26,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 23:40:26,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 23:40:26,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 23:40:26,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 23:40:26,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 23:40:26,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 23:40:26,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 23:40:26,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 23:40:26,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 23:40:26,921 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-05 23:40:26,921 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-05 23:40:26,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 23:40:26,922 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 23:40:27,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 23:40:27,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 23:40:27,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 23:40:27,183 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 23:40:27,184 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 23:40:27,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-04-05 23:40:27,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ab1b4fa/89e6bfd126984b95b536a77959f5d1d5/FLAGa2b4178ea [2022-04-05 23:40:27,614 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 23:40:27,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-04-05 23:40:27,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ab1b4fa/89e6bfd126984b95b536a77959f5d1d5/FLAGa2b4178ea [2022-04-05 23:40:28,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ab1b4fa/89e6bfd126984b95b536a77959f5d1d5 [2022-04-05 23:40:28,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 23:40:28,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-05 23:40:28,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 23:40:28,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 23:40:28,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 23:40:28,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 11:40:28" (1/1) ... [2022-04-05 23:40:28,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be5107c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:40:28, skipping insertion in model container [2022-04-05 23:40:28,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 11:40:28" (1/1) ... [2022-04-05 23:40:28,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 23:40:28,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 23:40:28,221 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_2.i[919,932] [2022-04-05 23:40:28,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 23:40:28,250 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 23:40:28,262 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_2.i[919,932] [2022-04-05 23:40:28,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 23:40:28,293 INFO L208 MainTranslator]: Completed translation [2022-04-05 23:40:28,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:40:28 WrapperNode [2022-04-05 23:40:28,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 23:40:28,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 23:40:28,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 23:40:28,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 23:40:28,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:40:28" (1/1) ... [2022-04-05 23:40:28,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:40:28" (1/1) ... [2022-04-05 23:40:28,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:40:28" (1/1) ... [2022-04-05 23:40:28,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:40:28" (1/1) ... [2022-04-05 23:40:28,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:40:28" (1/1) ... [2022-04-05 23:40:28,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:40:28" (1/1) ... [2022-04-05 23:40:28,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:40:28" (1/1) ... [2022-04-05 23:40:28,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 23:40:28,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 23:40:28,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 23:40:28,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 23:40:28,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:40:28" (1/1) ... [2022-04-05 23:40:28,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 23:40:28,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:40:28,374 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) [2022-04-05 23:40:28,395 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 [2022-04-05 23:40:28,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 23:40:28,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 23:40:28,416 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 23:40:28,416 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 23:40:28,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 23:40:28,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 23:40:28,417 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 23:40:28,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 23:40:28,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 23:40:28,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 23:40:28,417 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 23:40:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 23:40:28,497 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 23:40:28,499 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 23:40:28,646 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 23:40:28,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 23:40:28,671 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 23:40:28,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 11:40:28 BoogieIcfgContainer [2022-04-05 23:40:28,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 23:40:28,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 23:40:28,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 23:40:28,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 23:40:28,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 11:40:28" (1/3) ... [2022-04-05 23:40:28,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d73cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 11:40:28, skipping insertion in model container [2022-04-05 23:40:28,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:40:28" (2/3) ... [2022-04-05 23:40:28,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d73cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 11:40:28, skipping insertion in model container [2022-04-05 23:40:28,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 11:40:28" (3/3) ... [2022-04-05 23:40:28,692 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2022-04-05 23:40:28,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 23:40:28,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 23:40:28,757 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 23:40:28,765 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 [2022-04-05 23:40:28,766 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 23:40:28,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 23:40:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 23:40:28,796 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:40:28,797 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:40:28,797 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:40:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:40:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672905, now seen corresponding path program 1 times [2022-04-05 23:40:28,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:40:28,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897535792] [2022-04-05 23:40:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:40:28,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:40:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:29,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:40:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:40:29,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:40:29,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897535792] [2022-04-05 23:40:29,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897535792] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 23:40:29,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 23:40:29,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 23:40:29,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056096540] [2022-04-05 23:40:29,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 23:40:29,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 23:40:29,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:40:29,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 23:40:29,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 23:40:29,074 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:40:29,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:40:29,166 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-04-05 23:40:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 23:40:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-05 23:40:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:40:29,174 INFO L225 Difference]: With dead ends: 62 [2022-04-05 23:40:29,175 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 23:40:29,177 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 [2022-04-05 23:40:29,180 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 23:40:29,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 23:40:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 23:40:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-04-05 23:40:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 23:40:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-04-05 23:40:29,215 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-04-05 23:40:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:40:29,215 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-04-05 23:40:29,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:40:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-05 23:40:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-05 23:40:29,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:40:29,216 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:40:29,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 23:40:29,217 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:40:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:40:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash 778735204, now seen corresponding path program 1 times [2022-04-05 23:40:29,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:40:29,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6238639] [2022-04-05 23:40:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:40:29,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:40:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:29,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:40:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:29,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 23:40:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:40:29,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:40:29,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6238639] [2022-04-05 23:40:29,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6238639] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:40:29,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498268053] [2022-04-05 23:40:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:40:29,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:40:29,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:40:29,372 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) [2022-04-05 23:40:29,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 23:40:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:29,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 23:40:29,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:40:29,652 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 15 treesize of output 11 [2022-04-05 23:40:29,778 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-05 23:40:29,779 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 37 treesize of output 22 [2022-04-05 23:40:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:40:30,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:40:30,146 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 45 treesize of output 41 [2022-04-05 23:40:30,158 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 23:40:30,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-05 23:40:30,241 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-04-05 23:40:30,242 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 336 treesize of output 315 [2022-04-05 23:40:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:40:30,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498268053] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:40:30,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:40:30,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-04-05 23:40:30,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629757206] [2022-04-05 23:40:30,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:40:30,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 23:40:30,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:40:30,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 23:40:30,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-04-05 23:40:30,578 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 23:40:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:40:30,965 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-04-05 23:40:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 23:40:30,965 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-04-05 23:40:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:40:30,966 INFO L225 Difference]: With dead ends: 52 [2022-04-05 23:40:30,966 INFO L226 Difference]: Without dead ends: 41 [2022-04-05 23:40:30,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-04-05 23:40:30,968 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 23:40:30,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 69 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 264 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-04-05 23:40:30,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-05 23:40:30,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-04-05 23:40:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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) [2022-04-05 23:40:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-04-05 23:40:30,980 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-04-05 23:40:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:40:30,980 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-04-05 23:40:30,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 23:40:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-04-05 23:40:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 23:40:30,984 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:40:30,984 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:40:31,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 23:40:31,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:40:31,209 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:40:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:40:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1692936895, now seen corresponding path program 2 times [2022-04-05 23:40:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:40:31,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757073599] [2022-04-05 23:40:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:40:31,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:40:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:31,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:40:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:31,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 23:40:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:31,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 23:40:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 23:40:31,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:40:31,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757073599] [2022-04-05 23:40:31,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757073599] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:40:31,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84864471] [2022-04-05 23:40:31,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 23:40:31,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:40:31,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:40:31,327 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) [2022-04-05 23:40:31,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 23:40:31,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 23:40:31,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:40:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 23:40:31,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:40:31,471 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 15 treesize of output 11 [2022-04-05 23:40:31,741 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-05 23:40:31,742 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 45 treesize of output 48 [2022-04-05 23:40:31,990 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-05 23:40:31,991 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 37 treesize of output 22 [2022-04-05 23:40:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 23:40:32,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:40:35,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84864471] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:40:35,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 23:40:35,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-04-05 23:40:35,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653500925] [2022-04-05 23:40:35,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 23:40:35,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-05 23:40:35,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:40:35,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-05 23:40:35,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-04-05 23:40:35,864 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 23:40:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:40:36,490 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-04-05 23:40:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 23:40:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-04-05 23:40:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:40:36,493 INFO L225 Difference]: With dead ends: 66 [2022-04-05 23:40:36,493 INFO L226 Difference]: Without dead ends: 55 [2022-04-05 23:40:36,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=257, Invalid=1547, Unknown=2, NotChecked=0, Total=1806 [2022-04-05 23:40:36,498 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 23:40:36,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 71 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 165 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-04-05 23:40:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-05 23:40:36,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-04-05 23:40:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 23:40:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-04-05 23:40:36,508 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-04-05 23:40:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:40:36,509 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-04-05 23:40:36,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 23:40:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-04-05 23:40:36,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 23:40:36,510 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:40:36,510 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:40:36,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-05 23:40:36,731 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,SelfDestructingSolverStorable2 [2022-04-05 23:40:36,732 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:40:36,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:40:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1452373648, now seen corresponding path program 1 times [2022-04-05 23:40:36,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:40:36,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407913015] [2022-04-05 23:40:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:40:36,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:40:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:40:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:36,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 23:40:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:36,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 23:40:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:36,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 23:40:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:36,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 23:40:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 23:40:36,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:40:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407913015] [2022-04-05 23:40:36,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407913015] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:40:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628982063] [2022-04-05 23:40:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:40:36,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:40:36,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:40:36,912 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) [2022-04-05 23:40:36,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 23:40:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:36,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 23:40:36,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:40:37,077 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 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-05 23:40:37,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-05 23:40:37,835 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-04-05 23:40:37,836 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 56 treesize of output 57 [2022-04-05 23:40:47,025 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-04-05 23:40:47,025 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 48 treesize of output 21 [2022-04-05 23:40:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 23:40:47,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:40:55,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628982063] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:40:55,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 23:40:55,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19] total 22 [2022-04-05 23:40:55,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824967355] [2022-04-05 23:40:55,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 23:40:55,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-05 23:40:55,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:40:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-05 23:40:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=639, Unknown=8, NotChecked=0, Total=756 [2022-04-05 23:40:55,676 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 22 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-05 23:40:56,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:40:56,166 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-04-05 23:40:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-05 23:40:56,167 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-04-05 23:40:56,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:40:56,168 INFO L225 Difference]: With dead ends: 79 [2022-04-05 23:40:56,168 INFO L226 Difference]: Without dead ends: 62 [2022-04-05 23:40:56,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=221, Invalid=1411, Unknown=8, NotChecked=0, Total=1640 [2022-04-05 23:40:56,170 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 23:40:56,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 165 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 157 Invalid, 0 Unknown, 145 Unchecked, 0.1s Time] [2022-04-05 23:40:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-05 23:40:56,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-04-05 23:40:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 23:40:56,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-04-05 23:40:56,182 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-04-05 23:40:56,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:40:56,182 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-04-05 23:40:56,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-05 23:40:56,183 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-04-05 23:40:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 23:40:56,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:40:56,184 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:40:56,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 23:40:56,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:40:56,407 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:40:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:40:56,407 INFO L85 PathProgramCache]: Analyzing trace with hash 345870625, now seen corresponding path program 2 times [2022-04-05 23:40:56,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:40:56,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856781642] [2022-04-05 23:40:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:40:56,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:40:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:56,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:40:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:56,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 23:40:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:56,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 23:40:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:56,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 23:40:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:56,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 23:40:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:56,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-05 23:40:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:56,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-05 23:40:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:40:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-05 23:40:56,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:40:56,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856781642] [2022-04-05 23:40:56,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856781642] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:40:56,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505870035] [2022-04-05 23:40:56,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 23:40:56,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:40:56,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:40:56,580 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) [2022-04-05 23:40:56,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 23:40:56,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 23:40:56,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:40:56,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-05 23:40:56,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:40:56,772 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 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-05 23:40:56,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-05 23:40:56,824 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-04-05 23:40:56,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 100 treesize of output 28 [2022-04-05 23:40:59,156 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-04-05 23:40:59,157 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 56 treesize of output 57 [2022-04-05 23:41:02,757 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-04-05 23:41:02,758 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 48 treesize of output 21 [2022-04-05 23:41:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 23:41:02,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:41:09,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505870035] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:41:09,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 23:41:09,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 21] total 24 [2022-04-05 23:41:09,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913635273] [2022-04-05 23:41:09,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 23:41:09,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 23:41:09,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:41:09,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 23:41:09,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=795, Unknown=8, NotChecked=0, Total=930 [2022-04-05 23:41:09,356 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 20 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-05 23:41:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:41:12,357 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2022-04-05 23:41:12,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-05 23:41:12,357 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 20 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 61 [2022-04-05 23:41:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:41:12,359 INFO L225 Difference]: With dead ends: 111 [2022-04-05 23:41:12,359 INFO L226 Difference]: Without dead ends: 86 [2022-04-05 23:41:12,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=251, Invalid=1811, Unknown=8, NotChecked=0, Total=2070 [2022-04-05 23:41:12,360 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 62 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 23:41:12,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 111 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 255 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-04-05 23:41:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-05 23:41:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-04-05 23:41:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 23:41:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-04-05 23:41:12,375 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-04-05 23:41:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:41:12,375 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-04-05 23:41:12,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 20 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-05 23:41:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-04-05 23:41:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-05 23:41:12,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:41:12,378 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:41:12,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 23:41:12,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:41:12,587 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:41:12,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:41:12,588 INFO L85 PathProgramCache]: Analyzing trace with hash 648561106, now seen corresponding path program 3 times [2022-04-05 23:41:12,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:41:12,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25723288] [2022-04-05 23:41:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:41:12,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:41:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:12,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:41:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:12,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 23:41:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:12,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 23:41:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:12,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 23:41:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:12,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 23:41:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:12,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 23:41:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:12,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-05 23:41:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:12,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-05 23:41:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:12,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-05 23:41:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-05 23:41:12,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:41:12,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25723288] [2022-04-05 23:41:12,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25723288] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:41:12,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073294913] [2022-04-05 23:41:12,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 23:41:12,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:41:12,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:41:12,753 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) [2022-04-05 23:41:12,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 23:41:13,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-05 23:41:13,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:41:13,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 23:41:13,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:41:13,456 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 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-05 23:41:13,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 23:41:13,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-05 23:41:13,730 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 0 case distinctions, treesize of input 85 treesize of output 76 [2022-04-05 23:41:13,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 23:41:13,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 23:41:13,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 23:41:13,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 124 [2022-04-05 23:41:13,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-04-05 23:41:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-05 23:41:13,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:41:16,781 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 45 treesize of output 41 [2022-04-05 23:41:16,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-05 23:41:16,804 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 23:41:16,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-05 23:41:16,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-05 23:41:16,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 4 [2022-04-05 23:41:16,861 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-04-05 23:41:16,862 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 22 treesize of output 10 [2022-04-05 23:41:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-05 23:41:17,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073294913] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:41:17,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:41:17,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-04-05 23:41:17,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558524279] [2022-04-05 23:41:17,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:41:17,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-05 23:41:17,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:41:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-05 23:41:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 23:41:17,173 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-05 23:41:25,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:41:25,548 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2022-04-05 23:41:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-05 23:41:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 77 [2022-04-05 23:41:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:41:25,553 INFO L225 Difference]: With dead ends: 170 [2022-04-05 23:41:25,553 INFO L226 Difference]: Without dead ends: 137 [2022-04-05 23:41:25,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 145 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1048, Invalid=6262, Unknown=0, NotChecked=0, Total=7310 [2022-04-05 23:41:25,556 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 158 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-05 23:41:25,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 138 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1381 Invalid, 0 Unknown, 288 Unchecked, 2.7s Time] [2022-04-05 23:41:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-05 23:41:25,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2022-04-05 23:41:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 90 states have (on average 1.0777777777777777) internal successors, (97), 92 states have internal predecessors, (97), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-05 23:41:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 138 transitions. [2022-04-05 23:41:25,586 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 138 transitions. Word has length 77 [2022-04-05 23:41:25,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:41:25,586 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 138 transitions. [2022-04-05 23:41:25,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-05 23:41:25,587 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 138 transitions. [2022-04-05 23:41:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-05 23:41:25,590 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:41:25,590 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:41:25,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 23:41:25,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:41:25,795 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:41:25,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:41:25,796 INFO L85 PathProgramCache]: Analyzing trace with hash 616668035, now seen corresponding path program 4 times [2022-04-05 23:41:25,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:41:25,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153062134] [2022-04-05 23:41:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:41:25,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:41:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:41:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 23:41:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 23:41:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 23:41:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 23:41:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 23:41:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-05 23:41:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-05 23:41:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-05 23:41:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-05 23:41:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-05 23:41:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-05 23:41:25,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:41:25,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153062134] [2022-04-05 23:41:25,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153062134] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:41:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827354781] [2022-04-05 23:41:25,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 23:41:25,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:41:25,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:41:25,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 23:41:26,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 23:41:26,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 23:41:26,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:41:26,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 23:41:26,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:41:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-05 23:41:26,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:41:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-05 23:41:27,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827354781] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:41:27,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:41:27,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-05 23:41:27,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481629678] [2022-04-05 23:41:27,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:41:27,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 23:41:27,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:41:27,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 23:41:27,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-04-05 23:41:27,028 INFO L87 Difference]: Start difference. First operand 123 states and 138 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-05 23:41:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:41:28,365 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2022-04-05 23:41:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 23:41:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 93 [2022-04-05 23:41:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:41:28,367 INFO L225 Difference]: With dead ends: 211 [2022-04-05 23:41:28,367 INFO L226 Difference]: Without dead ends: 159 [2022-04-05 23:41:28,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-04-05 23:41:28,368 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 241 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 23:41:28,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 79 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 23:41:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-05 23:41:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-04-05 23:41:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 23:41:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-04-05 23:41:28,396 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-04-05 23:41:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:41:28,397 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-04-05 23:41:28,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-05 23:41:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-04-05 23:41:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-05 23:41:28,399 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:41:28,399 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:41:28,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 23:41:28,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:41:28,615 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:41:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:41:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1102839803, now seen corresponding path program 5 times [2022-04-05 23:41:28,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:41:28,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001596052] [2022-04-05 23:41:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:41:28,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:41:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:41:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 23:41:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 23:41:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 23:41:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 23:41:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 23:41:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-05 23:41:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-05 23:41:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-05 23:41:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 23:41:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-05 23:41:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-05 23:41:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-05 23:41:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-05 23:41:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-05 23:41:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-05 23:41:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-04-05 23:41:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-04-05 23:41:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:41:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-04-05 23:41:28,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:41:28,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001596052] [2022-04-05 23:41:28,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001596052] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:41:28,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953643313] [2022-04-05 23:41:28,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 23:41:28,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:41:28,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:41:28,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 23:41:28,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 23:42:08,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-04-05 23:42:08,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:42:08,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-05 23:42:09,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:42:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-05 23:42:09,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:42:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-04-05 23:42:09,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953643313] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:42:09,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:42:09,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-05 23:42:09,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552328636] [2022-04-05 23:42:09,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:42:09,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-05 23:42:09,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:42:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-05 23:42:09,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-04-05 23:42:09,912 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-04-05 23:42:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:42:26,521 INFO L93 Difference]: Finished difference Result 320 states and 388 transitions. [2022-04-05 23:42:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-05 23:42:26,521 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 149 [2022-04-05 23:42:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:42:26,523 INFO L225 Difference]: With dead ends: 320 [2022-04-05 23:42:26,523 INFO L226 Difference]: Without dead ends: 287 [2022-04-05 23:42:26,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2022-04-05 23:42:26,525 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 491 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 3301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-05 23:42:26,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 178 Invalid, 3828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 3301 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-05 23:42:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-05 23:42:26,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-04-05 23:42:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-05 23:42:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-04-05 23:42:26,567 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-04-05 23:42:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:42:26,567 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-04-05 23:42:26,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-04-05 23:42:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-04-05 23:42:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-04-05 23:42:26,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:42:26,571 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:42:26,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 23:42:26,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:42:26,783 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:42:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:42:26,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1415471691, now seen corresponding path program 6 times [2022-04-05 23:42:26,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:42:26,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698275042] [2022-04-05 23:42:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:42:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:42:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:42:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 23:42:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 23:42:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 23:42:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 23:42:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 23:42:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-05 23:42:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-05 23:42:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-05 23:42:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 23:42:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-05 23:42:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-05 23:42:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-05 23:42:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-05 23:42:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-05 23:42:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-05 23:42:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-05 23:42:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-05 23:42:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-05 23:42:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-05 23:42:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-04-05 23:42:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-04-05 23:42:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-05 23:42:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-04-05 23:42:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-04-05 23:42:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-05 23:42:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-04-05 23:42:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-04-05 23:42:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-05 23:42:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-04-05 23:42:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-04-05 23:42:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-04-05 23:42:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-04-05 23:42:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-04-05 23:42:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:42:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-04-05 23:42:27,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:42:27,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698275042] [2022-04-05 23:42:27,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698275042] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:42:27,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906820277] [2022-04-05 23:42:27,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 23:42:27,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:42:27,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:42:27,666 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 23:42:27,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process