/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/eureka_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 14:19:05,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:19:05,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:19:05,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 14:19:05,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 14:19:05,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 14:19:05,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 14:19:05,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 14:19:05,901 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:19:05,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:19:05,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:19:05,903 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:19:05,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:19:05,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:19:05,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:19:05,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:19:05,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:19:05,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:19:05,904 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:19:05,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:19:05,905 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:19:05,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:19:05,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:19:05,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:19:05,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:19:05,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:19:05,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:19:05,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:19:05,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:19:05,906 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:19:05,906 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:19:05,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:19:05,906 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:19:05,906 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:19:06,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:19:06,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:19:06,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:19:06,151 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:19:06,152 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:19:06,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-1.c [2022-04-06 14:19:06,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f934945d6/2c39a12b6f13448cbd71cf369c33c9a8/FLAGb3396183f [2022-04-06 14:19:06,577 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:19:06,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c [2022-04-06 14:19:06,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f934945d6/2c39a12b6f13448cbd71cf369c33c9a8/FLAGb3396183f [2022-04-06 14:19:06,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f934945d6/2c39a12b6f13448cbd71cf369c33c9a8 [2022-04-06 14:19:06,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:19:06,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:19:06,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:19:06,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:19:06,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:19:06,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:19:06" (1/1) ... [2022-04-06 14:19:06,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550b42d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:06, skipping insertion in model container [2022-04-06 14:19:06,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:19:06" (1/1) ... [2022-04-06 14:19:06,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:19:06,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:19:06,814 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c[446,459] [2022-04-06 14:19:06,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:19:06,846 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:19:06,858 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c[446,459] [2022-04-06 14:19:06,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:19:06,903 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:19:06,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:06 WrapperNode [2022-04-06 14:19:06,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:19:06,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:19:06,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:19:06,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:19:06,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:06" (1/1) ... [2022-04-06 14:19:06,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:06" (1/1) ... [2022-04-06 14:19:06,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:06" (1/1) ... [2022-04-06 14:19:06,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:06" (1/1) ... [2022-04-06 14:19:06,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:06" (1/1) ... [2022-04-06 14:19:06,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:06" (1/1) ... [2022-04-06 14:19:06,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:06" (1/1) ... [2022-04-06 14:19:06,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:19:06,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:19:06,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:19:06,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:19:06,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:06" (1/1) ... [2022-04-06 14:19:06,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:19:06,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:06,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 14:19:06,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 14:19:07,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:19:07,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:19:07,021 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 14:19:07,021 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:19:07,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 14:19:07,021 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:19:07,021 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:19:07,021 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 14:19:07,021 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:19:07,021 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:19:07,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:19:07,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 14:19:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:19:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:19:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 14:19:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:19:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:19:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:19:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:19:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:19:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:19:07,075 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:19:07,077 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:19:07,283 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:19:07,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:19:07,288 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-04-06 14:19:07,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:19:07 BoogieIcfgContainer [2022-04-06 14:19:07,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:19:07,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:19:07,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:19:07,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:19:07,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:19:06" (1/3) ... [2022-04-06 14:19:07,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffe4695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:19:07, skipping insertion in model container [2022-04-06 14:19:07,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:06" (2/3) ... [2022-04-06 14:19:07,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffe4695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:19:07, skipping insertion in model container [2022-04-06 14:19:07,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:19:07" (3/3) ... [2022-04-06 14:19:07,295 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2022-04-06 14:19:07,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:19:07,299 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:19:07,370 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:19:07,388 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 14:19:07,389 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:19:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 14:19:07,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:07,408 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:07,409 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:07,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:07,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1703238628, now seen corresponding path program 1 times [2022-04-06 14:19:07,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:07,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [444468920] [2022-04-06 14:19:07,436 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:19:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1703238628, now seen corresponding path program 2 times [2022-04-06 14:19:07,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:07,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440454008] [2022-04-06 14:19:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:07,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:07,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:07,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:07,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440454008] [2022-04-06 14:19:07,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440454008] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:07,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:07,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:19:07,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:07,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [444468920] [2022-04-06 14:19:07,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [444468920] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:07,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:07,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:19:07,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172251927] [2022-04-06 14:19:07,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:07,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 14:19:07,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 14:19:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:19:07,763 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:07,817 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2022-04-06 14:19:07,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 14:19:07,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 14:19:07,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:07,827 INFO L225 Difference]: With dead ends: 63 [2022-04-06 14:19:07,827 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 14:19:07,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:19:07,833 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:07,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:19:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 14:19:07,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 14:19:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 14:19:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-04-06 14:19:07,869 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2022-04-06 14:19:07,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:07,870 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-04-06 14:19:07,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-06 14:19:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 14:19:07,872 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:07,872 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:07,872 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:19:07,873 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:07,877 INFO L85 PathProgramCache]: Analyzing trace with hash -779965392, now seen corresponding path program 1 times [2022-04-06 14:19:07,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:07,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322811999] [2022-04-06 14:19:07,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:19:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash -779965392, now seen corresponding path program 2 times [2022-04-06 14:19:07,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:07,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548276957] [2022-04-06 14:19:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:07,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:08,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:08,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:08,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548276957] [2022-04-06 14:19:08,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548276957] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:08,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:08,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:19:08,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:08,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322811999] [2022-04-06 14:19:08,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322811999] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:08,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:08,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:19:08,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767205519] [2022-04-06 14:19:08,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:08,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:19:08,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:08,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:19:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 14:19:08,064 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:08,288 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-04-06 14:19:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:19:08,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 14:19:08,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:08,295 INFO L225 Difference]: With dead ends: 80 [2022-04-06 14:19:08,296 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 14:19:08,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 14:19:08,305 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:08,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 36 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:19:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 14:19:08,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2022-04-06 14:19:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 14:19:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-04-06 14:19:08,316 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 19 [2022-04-06 14:19:08,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:08,316 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-04-06 14:19:08,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:08,316 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-04-06 14:19:08,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 14:19:08,317 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:08,317 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:08,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 14:19:08,318 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:08,318 INFO L85 PathProgramCache]: Analyzing trace with hash 470194446, now seen corresponding path program 1 times [2022-04-06 14:19:08,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:08,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1949954646] [2022-04-06 14:19:08,331 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:08,331 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:08,332 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash 470194446, now seen corresponding path program 2 times [2022-04-06 14:19:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148872240] [2022-04-06 14:19:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:08,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:08,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:08,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:08,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148872240] [2022-04-06 14:19:08,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148872240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:08,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087222741] [2022-04-06 14:19:08,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:19:08,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:08,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:08,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:08,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 14:19:08,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:19:08,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:08,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 14:19:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:08,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-04-06 14:19:08,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-04-06 14:19:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:08,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:09,025 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 14 treesize of output 12 [2022-04-06 14:19:09,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-04-06 14:19:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:09,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087222741] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:09,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:09,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-04-06 14:19:09,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1949954646] [2022-04-06 14:19:09,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1949954646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:09,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:09,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:19:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633231021] [2022-04-06 14:19:09,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:09,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:19:09,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:19:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-04-06 14:19:09,069 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:09,348 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-04-06 14:19:09,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:19:09,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 14:19:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:09,350 INFO L225 Difference]: With dead ends: 78 [2022-04-06 14:19:09,350 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 14:19:09,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:19:09,352 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:09,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 50 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:19:09,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 14:19:09,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2022-04-06 14:19:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 48 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-04-06 14:19:09,370 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 25 [2022-04-06 14:19:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:09,370 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-04-06 14:19:09,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-04-06 14:19:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 14:19:09,372 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:09,372 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:09,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 14:19:09,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:09,596 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:09,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:09,597 INFO L85 PathProgramCache]: Analyzing trace with hash -550873908, now seen corresponding path program 1 times [2022-04-06 14:19:09,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:09,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1907645642] [2022-04-06 14:19:09,599 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:09,599 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:09,599 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:09,599 INFO L85 PathProgramCache]: Analyzing trace with hash -550873908, now seen corresponding path program 2 times [2022-04-06 14:19:09,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:09,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816835575] [2022-04-06 14:19:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:09,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:09,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:09,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:09,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816835575] [2022-04-06 14:19:09,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816835575] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:09,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:09,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:19:09,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:09,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1907645642] [2022-04-06 14:19:09,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1907645642] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:09,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:09,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:19:09,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430903640] [2022-04-06 14:19:09,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:09,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:19:09,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:09,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:19:09,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 14:19:09,652 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:09,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:09,700 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2022-04-06 14:19:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:19:09,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 14:19:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:09,702 INFO L225 Difference]: With dead ends: 82 [2022-04-06 14:19:09,702 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 14:19:09,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 14:19:09,704 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:09,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 40 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:19:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 14:19:09,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-04-06 14:19:09,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 49 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-04-06 14:19:09,713 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 25 [2022-04-06 14:19:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:09,714 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-04-06 14:19:09,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:09,714 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-04-06 14:19:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 14:19:09,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:09,715 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:09,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 14:19:09,715 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:09,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1439064257, now seen corresponding path program 1 times [2022-04-06 14:19:09,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:09,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1249139314] [2022-04-06 14:19:09,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:09,717 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:09,717 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:09,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1439064257, now seen corresponding path program 2 times [2022-04-06 14:19:09,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:09,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690841256] [2022-04-06 14:19:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:09,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:09,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:09,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:09,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690841256] [2022-04-06 14:19:09,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690841256] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:09,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794823379] [2022-04-06 14:19:09,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:19:09,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:09,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:09,824 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:09,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 14:19:09,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:19:09,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:09,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 14:19:09,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:09,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:10,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794823379] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:10,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:10,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2022-04-06 14:19:10,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:10,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1249139314] [2022-04-06 14:19:10,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1249139314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:10,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:10,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:19:10,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427429150] [2022-04-06 14:19:10,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:10,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:19:10,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:19:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-06 14:19:10,041 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:10,213 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2022-04-06 14:19:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:19:10,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 28 [2022-04-06 14:19:10,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:10,217 INFO L225 Difference]: With dead ends: 130 [2022-04-06 14:19:10,217 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 14:19:10,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-04-06 14:19:10,218 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:10,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 54 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:19:10,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 14:19:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2022-04-06 14:19:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 61 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2022-04-06 14:19:10,242 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 28 [2022-04-06 14:19:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:10,243 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2022-04-06 14:19:10,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2022-04-06 14:19:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 14:19:10,251 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:10,251 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:10,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 14:19:10,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:10,477 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash 244787668, now seen corresponding path program 1 times [2022-04-06 14:19:10,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:10,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1970644876] [2022-04-06 14:19:10,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:10,480 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:10,480 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:10,480 INFO L85 PathProgramCache]: Analyzing trace with hash 244787668, now seen corresponding path program 2 times [2022-04-06 14:19:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:10,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738864206] [2022-04-06 14:19:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:10,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:10,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:10,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:10,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738864206] [2022-04-06 14:19:10,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738864206] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:10,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235558169] [2022-04-06 14:19:10,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:19:10,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:10,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:10,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:10,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 14:19:10,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:19:10,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:10,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:19:10,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:10,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:10,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235558169] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:10,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:10,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-04-06 14:19:10,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:10,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1970644876] [2022-04-06 14:19:10,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1970644876] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:10,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:10,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:19:10,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000510029] [2022-04-06 14:19:10,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:10,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:19:10,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:19:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:19:10,850 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:11,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:11,151 INFO L93 Difference]: Finished difference Result 178 states and 225 transitions. [2022-04-06 14:19:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:19:11,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 28 [2022-04-06 14:19:11,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:11,153 INFO L225 Difference]: With dead ends: 178 [2022-04-06 14:19:11,153 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 14:19:11,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:19:11,156 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:11,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 73 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:19:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 14:19:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 87. [2022-04-06 14:19:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 80 states have internal predecessors, (103), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-04-06 14:19:11,181 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 28 [2022-04-06 14:19:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:11,182 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-04-06 14:19:11,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-04-06 14:19:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 14:19:11,182 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:11,183 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:11,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 14:19:11,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:11,388 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash 777875589, now seen corresponding path program 1 times [2022-04-06 14:19:11,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:11,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109947814] [2022-04-06 14:19:11,389 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:11,389 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:11,390 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:11,390 INFO L85 PathProgramCache]: Analyzing trace with hash 777875589, now seen corresponding path program 2 times [2022-04-06 14:19:11,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:11,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017462876] [2022-04-06 14:19:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:11,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:11,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:11,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:11,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017462876] [2022-04-06 14:19:11,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017462876] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:11,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866802502] [2022-04-06 14:19:11,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:19:11,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:11,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:11,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:11,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 14:19:11,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:19:11,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:11,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 14:19:11,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:11,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2022-04-06 14:19:11,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 18 [2022-04-06 14:19:12,097 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-04-06 14:19:12,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-04-06 14:19:12,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-04-06 14:19:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:12,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:14,474 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_9 Int)) (or (forall ((v_ArrVal_192 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_9 4) |c_main_~#distance~0.offset|) v_ArrVal_192) |c_main_~#distance~0.offset|))) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)) v_main_~x~0_9)))) is different from false [2022-04-06 14:19:14,919 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_9 Int) (v_ArrVal_192 Int)) (or (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|) v_main_~x~0_9)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_9 4) |c_main_~#distance~0.offset|) v_ArrVal_192) |c_main_~#distance~0.offset|)))) is different from false [2022-04-06 14:19:15,445 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_9 Int) (v_ArrVal_192 Int) (v_ArrVal_191 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* c_main_~i~0 4) |c_main_~#distance~0.offset|) v_ArrVal_191))) (or (<= 0 (select (store .cse0 (+ (* v_main_~x~0_9 4) |c_main_~#distance~0.offset|) v_ArrVal_192) |c_main_~#distance~0.offset|)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|) v_main_~x~0_9)) (not (<= 0 v_ArrVal_191))))) is different from false [2022-04-06 14:19:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-04-06 14:19:15,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866802502] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:15,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:15,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-04-06 14:19:15,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:15,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109947814] [2022-04-06 14:19:15,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109947814] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:15,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:15,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:19:15,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891427252] [2022-04-06 14:19:15,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:15,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:19:15,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:19:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=556, Unknown=3, NotChecked=150, Total=812 [2022-04-06 14:19:15,521 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:16,231 INFO L93 Difference]: Finished difference Result 177 states and 227 transitions. [2022-04-06 14:19:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:19:16,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 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 31 [2022-04-06 14:19:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:16,233 INFO L225 Difference]: With dead ends: 177 [2022-04-06 14:19:16,233 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 14:19:16,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=297, Invalid=1194, Unknown=3, NotChecked=228, Total=1722 [2022-04-06 14:19:16,234 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 188 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:16,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 51 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:19:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 14:19:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 89. [2022-04-06 14:19:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2022-04-06 14:19:16,252 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 31 [2022-04-06 14:19:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:16,253 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2022-04-06 14:19:16,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2022-04-06 14:19:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 14:19:16,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:16,254 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:16,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 14:19:16,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:16,467 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:16,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:16,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1819082994, now seen corresponding path program 3 times [2022-04-06 14:19:16,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:16,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1280388903] [2022-04-06 14:19:16,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:16,469 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:16,470 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1819082994, now seen corresponding path program 4 times [2022-04-06 14:19:16,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:16,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119026235] [2022-04-06 14:19:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:16,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:16,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:19:16,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:16,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119026235] [2022-04-06 14:19:16,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119026235] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:16,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842898481] [2022-04-06 14:19:16,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:19:16,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:16,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:16,622 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:16,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 14:19:16,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:19:16,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:16,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 14:19:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:16,694 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 [2022-04-06 14:19:16,754 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 14:19:16,755 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 28 treesize of output 27 [2022-04-06 14:19:17,103 INFO L356 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2022-04-06 14:19:17,103 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 20 treesize of output 10 [2022-04-06 14:19:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:17,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:17,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842898481] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:17,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:17,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 35 [2022-04-06 14:19:17,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:17,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1280388903] [2022-04-06 14:19:17,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1280388903] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:17,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:17,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:19:17,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262524688] [2022-04-06 14:19:17,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:17,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:19:17,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:17,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:19:17,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 14:19:17,565 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:18,002 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2022-04-06 14:19:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:19:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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 31 [2022-04-06 14:19:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:18,004 INFO L225 Difference]: With dead ends: 218 [2022-04-06 14:19:18,004 INFO L226 Difference]: Without dead ends: 216 [2022-04-06 14:19:18,005 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 14:19:18,006 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 150 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:18,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 62 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:19:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-04-06 14:19:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 112. [2022-04-06 14:19:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 105 states have internal predecessors, (141), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2022-04-06 14:19:18,033 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 31 [2022-04-06 14:19:18,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:18,033 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2022-04-06 14:19:18,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2022-04-06 14:19:18,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 14:19:18,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:18,036 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:18,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 14:19:18,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:18,256 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash -12240024, now seen corresponding path program 1 times [2022-04-06 14:19:18,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:18,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [418426595] [2022-04-06 14:19:18,257 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:18,257 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:18,258 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash -12240024, now seen corresponding path program 2 times [2022-04-06 14:19:18,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:18,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063595282] [2022-04-06 14:19:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:18,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:18,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 14:19:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:18,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:18,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063595282] [2022-04-06 14:19:18,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063595282] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:18,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123062858] [2022-04-06 14:19:18,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:19:18,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:18,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:18,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 14:19:18,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:19:18,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:19:18,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:18,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:18,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123062858] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:18,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:18,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-04-06 14:19:18,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:18,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [418426595] [2022-04-06 14:19:18,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [418426595] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:18,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:18,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:19:18,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825029663] [2022-04-06 14:19:18,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:18,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:19:18,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:18,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:19:18,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:19:18,576 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 14:19:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:18,823 INFO L93 Difference]: Finished difference Result 254 states and 333 transitions. [2022-04-06 14:19:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:19:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-04-06 14:19:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:18,824 INFO L225 Difference]: With dead ends: 254 [2022-04-06 14:19:18,825 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 14:19:18,825 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:19:18,826 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 152 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:18,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 48 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:19:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 14:19:18,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 131. [2022-04-06 14:19:18,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 124 states have internal predecessors, (164), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:18,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2022-04-06 14:19:18,852 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 33 [2022-04-06 14:19:18,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:18,852 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2022-04-06 14:19:18,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 14:19:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2022-04-06 14:19:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 14:19:18,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:18,853 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:18,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 14:19:19,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:19,068 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1882894858, now seen corresponding path program 3 times [2022-04-06 14:19:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:19,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [236641342] [2022-04-06 14:19:19,069 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:19,069 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:19,070 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1882894858, now seen corresponding path program 4 times [2022-04-06 14:19:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:19,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514991332] [2022-04-06 14:19:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:19,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:19,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:19,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514991332] [2022-04-06 14:19:19,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514991332] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:19,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656981735] [2022-04-06 14:19:19,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:19:19,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:19,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:19,137 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:19,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 14:19:19,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:19:19,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:19:19,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:19,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:19,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656981735] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:19,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:19,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-04-06 14:19:19,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:19,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [236641342] [2022-04-06 14:19:19,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [236641342] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:19,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:19,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:19:19,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951588595] [2022-04-06 14:19:19,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:19,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:19:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:19,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:19:19,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:19:19,367 INFO L87 Difference]: Start difference. First operand 131 states and 172 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:19,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:19,669 INFO L93 Difference]: Finished difference Result 240 states and 310 transitions. [2022-04-06 14:19:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:19:19,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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 34 [2022-04-06 14:19:19,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:19,671 INFO L225 Difference]: With dead ends: 240 [2022-04-06 14:19:19,671 INFO L226 Difference]: Without dead ends: 219 [2022-04-06 14:19:19,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-04-06 14:19:19,672 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 124 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:19,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 68 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:19:19,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-04-06 14:19:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 174. [2022-04-06 14:19:19,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 165 states have (on average 1.3393939393939394) internal successors, (221), 167 states have internal predecessors, (221), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2022-04-06 14:19:19,709 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 34 [2022-04-06 14:19:19,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:19,709 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2022-04-06 14:19:19,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2022-04-06 14:19:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 14:19:19,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:19,710 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:19,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 14:19:19,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:19,932 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:19,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1856507910, now seen corresponding path program 5 times [2022-04-06 14:19:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:19,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [633373225] [2022-04-06 14:19:19,933 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:19,933 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:19,933 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:19,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1856507910, now seen corresponding path program 6 times [2022-04-06 14:19:19,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:19,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264810452] [2022-04-06 14:19:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:19,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:19,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 14:19:19,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:19,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264810452] [2022-04-06 14:19:19,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264810452] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:19,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875756117] [2022-04-06 14:19:19,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:19:19,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:19,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:19,979 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:19,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 14:19:20,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 14:19:20,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:20,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 14:19:20,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 14:19:20,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 14:19:20,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875756117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:20,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 14:19:20,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-04-06 14:19:20,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:20,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [633373225] [2022-04-06 14:19:20,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [633373225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:20,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:20,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:19:20,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811448912] [2022-04-06 14:19:20,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:20,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:19:20,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:20,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:19:20,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 14:19:20,132 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:20,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:20,197 INFO L93 Difference]: Finished difference Result 292 states and 382 transitions. [2022-04-06 14:19:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:19:20,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 14:19:20,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:20,199 INFO L225 Difference]: With dead ends: 292 [2022-04-06 14:19:20,199 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 14:19:20,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 14:19:20,200 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:20,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 70 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:19:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 14:19:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 139. [2022-04-06 14:19:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 130 states have (on average 1.2846153846153847) internal successors, (167), 132 states have internal predecessors, (167), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2022-04-06 14:19:20,229 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 34 [2022-04-06 14:19:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:20,229 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2022-04-06 14:19:20,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2022-04-06 14:19:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 14:19:20,230 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:20,230 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:20,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 14:19:20,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 14:19:20,451 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:20,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:20,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1637653192, now seen corresponding path program 7 times [2022-04-06 14:19:20,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:20,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [360418486] [2022-04-06 14:19:20,454 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:20,454 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:20,454 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:20,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1637653192, now seen corresponding path program 8 times [2022-04-06 14:19:20,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:20,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259765527] [2022-04-06 14:19:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:20,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:20,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:20,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:20,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259765527] [2022-04-06 14:19:20,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259765527] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:20,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977908421] [2022-04-06 14:19:20,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:19:20,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:20,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:20,547 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:20,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 14:19:20,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:19:20,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:20,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 14:19:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:20,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:20,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977908421] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:20,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:20,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-04-06 14:19:20,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:20,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [360418486] [2022-04-06 14:19:20,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [360418486] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:20,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:20,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:19:20,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289987396] [2022-04-06 14:19:20,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:20,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:19:20,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:20,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:19:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-04-06 14:19:20,825 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:21,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:21,254 INFO L93 Difference]: Finished difference Result 296 states and 374 transitions. [2022-04-06 14:19:21,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:19:21,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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 34 [2022-04-06 14:19:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:21,257 INFO L225 Difference]: With dead ends: 296 [2022-04-06 14:19:21,257 INFO L226 Difference]: Without dead ends: 275 [2022-04-06 14:19:21,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:19:21,258 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 168 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:21,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 97 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:19:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-06 14:19:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 154. [2022-04-06 14:19:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 145 states have (on average 1.289655172413793) internal successors, (187), 147 states have internal predecessors, (187), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2022-04-06 14:19:21,294 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 34 [2022-04-06 14:19:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:21,294 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2022-04-06 14:19:21,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2022-04-06 14:19:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 14:19:21,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:21,295 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:21,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 14:19:21,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:21,503 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1470221714, now seen corresponding path program 5 times [2022-04-06 14:19:21,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:21,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [804116368] [2022-04-06 14:19:21,505 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:21,505 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:21,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:21,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1470221714, now seen corresponding path program 6 times [2022-04-06 14:19:21,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:21,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657976941] [2022-04-06 14:19:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:21,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:22,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:22,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:22,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657976941] [2022-04-06 14:19:22,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657976941] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:22,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807864139] [2022-04-06 14:19:22,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:19:22,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:22,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:22,016 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:22,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 14:19:22,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 14:19:22,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:22,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 14:19:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:22,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-04-06 14:19:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:19:22,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:19:22,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:19:22,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-04-06 14:19:22,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:19:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:19:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:19:22,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:19:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:19:22,454 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-04-06 14:19:22,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 63 [2022-04-06 14:19:22,608 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-04-06 14:19:22,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 55 [2022-04-06 14:19:22,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2022-04-06 14:19:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:19:22,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:25,069 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_18 Int)) (or (forall ((v_ArrVal_434 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|))) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)) v_main_~x~0_18)))) is different from false [2022-04-06 14:19:25,435 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_main_~x~0_18 Int)) (or (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18)))) is different from false [2022-04-06 14:19:26,699 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~x~0_18 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* 4 c_main_~x~0) |c_main_~#distance~0.offset|) v_ArrVal_431))) (or (<= 0 (select (store .cse0 (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18))))) is different from false [2022-04-06 14:19:28,736 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_19 Int)) (or (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)) v_main_~x~0_19)) (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~x~0_18 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ |c_main_~#distance~0.offset| (* v_main_~x~0_19 4)) v_ArrVal_431))) (or (<= 0 (select (store .cse0 (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18))))))) is different from false [2022-04-06 14:19:30,281 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~x~0_19 Int) (v_main_~x~0_18 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ |c_main_~#distance~0.offset| (* v_main_~x~0_19 4)) v_ArrVal_431))) (or (<= 0 (select (store .cse0 (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) (+ 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18)) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|) v_main_~x~0_19))))) is different from false [2022-04-06 14:19:32,445 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~x~0_19 Int) (v_ArrVal_429 Int) (v_main_~x~0_18 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* c_main_~i~0 4) |c_main_~#distance~0.offset|) v_ArrVal_429))) (let ((.cse1 (store .cse0 (+ |c_main_~#distance~0.offset| (* v_main_~x~0_19 4)) v_ArrVal_431))) (or (not (<= 0 v_ArrVal_429)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|) v_main_~x~0_19)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse1) |c_main_~#Dest~0.base|) (+ 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18)) (<= 0 (select (store .cse1 (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)))))) is different from false [2022-04-06 14:19:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 7 not checked. [2022-04-06 14:19:32,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807864139] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:32,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:32,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 14] total 37 [2022-04-06 14:19:32,530 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:32,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [804116368] [2022-04-06 14:19:32,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [804116368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:32,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:32,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:19:32,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326215991] [2022-04-06 14:19:32,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:32,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:19:32,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:19:32,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=816, Unknown=6, NotChecked=378, Total=1332 [2022-04-06 14:19:32,532 INFO L87 Difference]: Start difference. First operand 154 states and 195 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:33,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:33,175 INFO L93 Difference]: Finished difference Result 187 states and 232 transitions. [2022-04-06 14:19:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:19:33,175 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 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 37 [2022-04-06 14:19:33,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:33,176 INFO L225 Difference]: With dead ends: 187 [2022-04-06 14:19:33,176 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 14:19:33,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=271, Invalid=1553, Unknown=6, NotChecked=522, Total=2352 [2022-04-06 14:19:33,177 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 132 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:33,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 59 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:19:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 14:19:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2022-04-06 14:19:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 148 states have (on average 1.2905405405405406) internal successors, (191), 150 states have internal predecessors, (191), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 199 transitions. [2022-04-06 14:19:33,209 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 199 transitions. Word has length 37 [2022-04-06 14:19:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:33,209 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 199 transitions. [2022-04-06 14:19:33,209 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 199 transitions. [2022-04-06 14:19:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 14:19:33,210 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:33,210 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:33,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 14:19:33,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 14:19:33,411 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:33,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:33,411 INFO L85 PathProgramCache]: Analyzing trace with hash -651731607, now seen corresponding path program 1 times [2022-04-06 14:19:33,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:33,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1855611730] [2022-04-06 14:19:33,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:33,412 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:33,412 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:33,412 INFO L85 PathProgramCache]: Analyzing trace with hash -651731607, now seen corresponding path program 2 times [2022-04-06 14:19:33,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:33,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715073011] [2022-04-06 14:19:33,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:33,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:33,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 14:19:33,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:33,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715073011] [2022-04-06 14:19:33,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715073011] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:33,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:33,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:19:33,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:33,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1855611730] [2022-04-06 14:19:33,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1855611730] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:33,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:33,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:19:33,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828923825] [2022-04-06 14:19:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:33,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:19:33,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:33,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:19:33,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 14:19:33,473 INFO L87 Difference]: Start difference. First operand 157 states and 199 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:33,571 INFO L93 Difference]: Finished difference Result 247 states and 314 transitions. [2022-04-06 14:19:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:19:33,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 37 [2022-04-06 14:19:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:33,573 INFO L225 Difference]: With dead ends: 247 [2022-04-06 14:19:33,573 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 14:19:33,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-06 14:19:33,574 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:33,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:19:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 14:19:33,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2022-04-06 14:19:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 148 states have (on average 1.2702702702702702) internal successors, (188), 150 states have internal predecessors, (188), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 196 transitions. [2022-04-06 14:19:33,611 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 196 transitions. Word has length 37 [2022-04-06 14:19:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:33,611 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 196 transitions. [2022-04-06 14:19:33,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:33,611 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 196 transitions. [2022-04-06 14:19:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 14:19:33,612 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:33,612 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:33,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-06 14:19:33,612 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:33,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1411406606, now seen corresponding path program 9 times [2022-04-06 14:19:33,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:33,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [432237677] [2022-04-06 14:19:33,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:33,614 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:33,614 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1411406606, now seen corresponding path program 10 times [2022-04-06 14:19:33,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:33,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983830905] [2022-04-06 14:19:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:33,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:33,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 14:19:33,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:33,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983830905] [2022-04-06 14:19:33,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983830905] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:33,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189661856] [2022-04-06 14:19:33,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:19:33,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:33,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:33,754 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:33,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 14:19:33,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:19:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:33,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 14:19:33,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:33,825 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 [2022-04-06 14:19:33,858 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 14:19:33,858 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 28 treesize of output 27 [2022-04-06 14:19:33,898 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 14:19:33,899 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 28 treesize of output 27 [2022-04-06 14:19:34,304 INFO L356 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2022-04-06 14:19:34,305 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 20 treesize of output 10 [2022-04-06 14:19:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:34,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:34,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189661856] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:34,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:34,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 40 [2022-04-06 14:19:34,855 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:34,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [432237677] [2022-04-06 14:19:34,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [432237677] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:34,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:34,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:19:34,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197842901] [2022-04-06 14:19:34,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:34,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:19:34,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:19:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1316, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 14:19:34,857 INFO L87 Difference]: Start difference. First operand 157 states and 196 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:35,239 INFO L93 Difference]: Finished difference Result 237 states and 298 transitions. [2022-04-06 14:19:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:19:35,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 37 [2022-04-06 14:19:35,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:35,240 INFO L225 Difference]: With dead ends: 237 [2022-04-06 14:19:35,240 INFO L226 Difference]: Without dead ends: 235 [2022-04-06 14:19:35,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=335, Invalid=1827, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 14:19:35,241 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:35,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 66 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:19:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-04-06 14:19:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 162. [2022-04-06 14:19:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 153 states have (on average 1.2745098039215685) internal successors, (195), 155 states have internal predecessors, (195), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:19:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2022-04-06 14:19:35,277 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 37 [2022-04-06 14:19:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:35,277 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2022-04-06 14:19:35,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2022-04-06 14:19:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 14:19:35,278 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:35,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:35,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 14:19:35,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 14:19:35,490 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:35,490 INFO L85 PathProgramCache]: Analyzing trace with hash 524779340, now seen corresponding path program 1 times [2022-04-06 14:19:35,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:35,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [797634779] [2022-04-06 14:19:35,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:35,493 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:35,493 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:35,493 INFO L85 PathProgramCache]: Analyzing trace with hash 524779340, now seen corresponding path program 2 times [2022-04-06 14:19:35,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:35,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358247745] [2022-04-06 14:19:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:35,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:35,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:35,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 14:19:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:19:35,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:35,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358247745] [2022-04-06 14:19:35,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358247745] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:35,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328370139] [2022-04-06 14:19:35,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:19:35,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:35,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:35,667 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:35,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 14:19:35,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:19:35,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:35,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 14:19:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:35,818 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 13 treesize of output 9 [2022-04-06 14:19:37,931 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 19 treesize of output 7 [2022-04-06 14:19:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:19:37,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:40,063 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 16 treesize of output 14 [2022-04-06 14:19:40,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-04-06 14:19:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:19:40,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328370139] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:40,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:40,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 28 [2022-04-06 14:19:40,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:40,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [797634779] [2022-04-06 14:19:40,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [797634779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:40,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:40,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:19:40,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769182204] [2022-04-06 14:19:40,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:40,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:19:40,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:40,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:19:40,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=654, Unknown=2, NotChecked=0, Total=756 [2022-04-06 14:19:40,163 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 14:19:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:40,763 INFO L93 Difference]: Finished difference Result 232 states and 291 transitions. [2022-04-06 14:19:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:19:40,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-04-06 14:19:40,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:40,765 INFO L225 Difference]: With dead ends: 232 [2022-04-06 14:19:40,765 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 14:19:40,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=231, Invalid=1249, Unknown=2, NotChecked=0, Total=1482 [2022-04-06 14:19:40,766 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 200 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:40,766 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 75 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:19:40,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 14:19:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 170. [2022-04-06 14:19:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 159 states have (on average 1.2641509433962264) internal successors, (201), 161 states have internal predecessors, (201), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 14:19:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 211 transitions. [2022-04-06 14:19:40,806 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 211 transitions. Word has length 39 [2022-04-06 14:19:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:40,806 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 211 transitions. [2022-04-06 14:19:40,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 14:19:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 211 transitions. [2022-04-06 14:19:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 14:19:40,807 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:40,807 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:40,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 14:19:41,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 14:19:41,010 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:41,011 INFO L85 PathProgramCache]: Analyzing trace with hash 994866975, now seen corresponding path program 7 times [2022-04-06 14:19:41,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:41,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1265116436] [2022-04-06 14:19:41,012 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:41,012 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:41,012 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash 994866975, now seen corresponding path program 8 times [2022-04-06 14:19:41,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:41,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033450765] [2022-04-06 14:19:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:41,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:41,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:41,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033450765] [2022-04-06 14:19:41,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033450765] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972334464] [2022-04-06 14:19:41,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:19:41,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:41,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:41,090 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:41,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 14:19:41,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:19:41,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:41,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 14:19:41,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:41,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:19:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:19:41,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972334464] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:19:41,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:19:41,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-04-06 14:19:41,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:41,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1265116436] [2022-04-06 14:19:41,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1265116436] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:41,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:41,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:19:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977829243] [2022-04-06 14:19:41,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:41,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:19:41,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:19:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-04-06 14:19:41,385 INFO L87 Difference]: Start difference. First operand 170 states and 211 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:41,788 INFO L93 Difference]: Finished difference Result 366 states and 463 transitions. [2022-04-06 14:19:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:19:41,788 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 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 40 [2022-04-06 14:19:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:41,790 INFO L225 Difference]: With dead ends: 366 [2022-04-06 14:19:41,790 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 14:19:41,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-04-06 14:19:41,791 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:41,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 83 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:19:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 14:19:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 227. [2022-04-06 14:19:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 216 states have (on average 1.2962962962962963) internal successors, (280), 218 states have internal predecessors, (280), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 14:19:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 290 transitions. [2022-04-06 14:19:41,858 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 290 transitions. Word has length 40 [2022-04-06 14:19:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:41,859 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 290 transitions. [2022-04-06 14:19:41,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 290 transitions. [2022-04-06 14:19:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 14:19:41,860 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:41,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:41,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 14:19:42,061 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 14:19:42,062 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:42,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:42,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1497733084, now seen corresponding path program 3 times [2022-04-06 14:19:42,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:42,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [77227231] [2022-04-06 14:19:42,063 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:19:42,063 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:19:42,063 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:19:42,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1497733084, now seen corresponding path program 4 times [2022-04-06 14:19:42,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:42,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834339471] [2022-04-06 14:19:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:42,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:42,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 14:19:42,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834339471] [2022-04-06 14:19:42,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834339471] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:19:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681377132] [2022-04-06 14:19:42,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:19:42,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:19:42,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:42,558 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:19:42,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 14:19:42,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:19:42,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:19:42,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 14:19:42,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:19:42,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 76 [2022-04-06 14:19:42,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-04-06 14:19:42,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:19:42,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-06 14:19:43,178 INFO L356 Elim1Store]: treesize reduction 22, result has 50.0 percent of original size [2022-04-06 14:19:43,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 47 [2022-04-06 14:19:43,762 INFO L356 Elim1Store]: treesize reduction 122, result has 40.5 percent of original size [2022-04-06 14:19:43,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 97 treesize of output 142 [2022-04-06 14:19:49,914 INFO L356 Elim1Store]: treesize reduction 23, result has 56.6 percent of original size [2022-04-06 14:19:49,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 64 [2022-04-06 14:19:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:50,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:19,449 WARN L232 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 33 DAG size of output: 22 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-04-06 14:20:19,450 INFO L356 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2022-04-06 14:20:19,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 656201695925 treesize of output 618134774101