/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/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:01:04,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:01:04,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:01:04,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 13:01:04,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:01:04,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:01:04,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:01:04,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 13:01:04,607 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:01:04,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:01:04,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:01:04,609 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:01:04,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:01:04,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:01:04,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:01:04,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:01:04,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:01:04,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:01:04,611 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:01:04,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:01:04,611 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:01:04,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:01:04,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:01:04,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:01:04,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:01:04,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:01:04,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:01:04,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:01:04,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:01:04,612 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:01:04,612 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:01:04,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:01:04,613 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:01:04,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:01:04,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:01:04,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:01:04,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:01:04,944 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:01:04,944 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:01:04,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-03-20 13:01:04,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3075a5873/fbbdbac991134b9898172471992ab58f/FLAG4c8c81118 [2022-03-20 13:01:05,374 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:01:05,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-03-20 13:01:05,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3075a5873/fbbdbac991134b9898172471992ab58f/FLAG4c8c81118 [2022-03-20 13:01:05,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3075a5873/fbbdbac991134b9898172471992ab58f [2022-03-20 13:01:05,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:01:05,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:01:05,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:01:05,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:01:05,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:01:05,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:01:05" (1/1) ... [2022-03-20 13:01:05,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f836145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:01:05, skipping insertion in model container [2022-03-20 13:01:05,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:01:05" (1/1) ... [2022-03-20 13:01:05,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:01:05,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:01:05,976 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-03-20 13:01:05,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:01:05,992 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:01:05,999 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-03-20 13:01:06,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:01:06,011 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:01:06,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:01:06 WrapperNode [2022-03-20 13:01:06,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:01:06,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:01:06,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:01:06,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:01:06,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:01:06" (1/1) ... [2022-03-20 13:01:06,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:01:06" (1/1) ... [2022-03-20 13:01:06,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:01:06" (1/1) ... [2022-03-20 13:01:06,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:01:06" (1/1) ... [2022-03-20 13:01:06,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:01:06" (1/1) ... [2022-03-20 13:01:06,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:01:06" (1/1) ... [2022-03-20 13:01:06,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:01:06" (1/1) ... [2022-03-20 13:01:06,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:01:06,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:01:06,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:01:06,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:01:06,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:01:06" (1/1) ... [2022-03-20 13:01:06,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:01:06,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:06,053 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) [2022-03-20 13:01:06,076 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 [2022-03-20 13:01:06,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:01:06,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:01:06,086 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:01:06,086 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 13:01:06,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:01:06,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:01:06,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:01:06,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:01:06,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 13:01:06,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 13:01:06,086 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:01:06,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:01:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 13:01:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:01:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 13:01:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:01:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 13:01:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:01:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:01:06,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:01:06,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:01:06,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:01:06,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:01:06,132 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:01:06,133 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:01:06,219 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:01:06,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:01:06,223 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 13:01:06,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:01:06 BoogieIcfgContainer [2022-03-20 13:01:06,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:01:06,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:01:06,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:01:06,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:01:06,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:01:05" (1/3) ... [2022-03-20 13:01:06,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fad6859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:01:06, skipping insertion in model container [2022-03-20 13:01:06,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:01:06" (2/3) ... [2022-03-20 13:01:06,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fad6859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:01:06, skipping insertion in model container [2022-03-20 13:01:06,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:01:06" (3/3) ... [2022-03-20 13:01:06,230 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2022-03-20 13:01:06,233 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:01:06,233 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:01:06,262 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:01:06,267 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 [2022-03-20 13:01:06,267 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:01:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:01:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 13:01:06,281 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:06,282 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:06,282 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:06,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672905, now seen corresponding path program 1 times [2022-03-20 13:01:06,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:06,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2108365989] [2022-03-20 13:01:06,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:01:06,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672905, now seen corresponding path program 2 times [2022-03-20 13:01:06,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:06,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869867001] [2022-03-20 13:01:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:06,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:06,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:01:06,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:06,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869867001] [2022-03-20 13:01:06,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869867001] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:06,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:06,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 13:01:06,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:06,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2108365989] [2022-03-20 13:01:06,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2108365989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:06,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:06,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 13:01:06,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725193450] [2022-03-20 13:01:06,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:06,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 13:01:06,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 13:01:06,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 13:01:06,567 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:06,677 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-03-20 13:01:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 13:01:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 13:01:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:06,684 INFO L225 Difference]: With dead ends: 62 [2022-03-20 13:01:06,684 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 13:01:06,686 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 [2022-03-20 13:01:06,688 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:06,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:01:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 13:01:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-03-20 13:01:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:01:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-03-20 13:01:06,721 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-03-20 13:01:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:06,722 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-03-20 13:01:06,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-03-20 13:01:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 13:01:06,722 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:06,723 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:06,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:01:06,723 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:06,724 INFO L85 PathProgramCache]: Analyzing trace with hash 778735204, now seen corresponding path program 1 times [2022-03-20 13:01:06,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:06,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [565774023] [2022-03-20 13:01:06,739 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:06,740 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:06,740 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:06,740 INFO L85 PathProgramCache]: Analyzing trace with hash 778735204, now seen corresponding path program 2 times [2022-03-20 13:01:06,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:06,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556970138] [2022-03-20 13:01:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:06,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:06,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:06,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:01:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:01:06,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:06,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556970138] [2022-03-20 13:01:06,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556970138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:06,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137622664] [2022-03-20 13:01:06,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:01:06,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:06,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:06,832 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) [2022-03-20 13:01:06,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 13:01:06,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:01:06,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:06,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 13:01:06,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:07,108 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 [2022-03-20 13:01:07,192 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:01:07,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:01:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:01:07,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:07,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-03-20 13:01:07,546 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 13:01:07,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-03-20 13:01:07,614 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-03-20 13:01:07,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 315 [2022-03-20 13:01:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:01:07,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137622664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:07,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:07,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-03-20 13:01:07,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:07,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [565774023] [2022-03-20 13:01:07,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [565774023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:07,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:07,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:01:07,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911179182] [2022-03-20 13:01:07,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:07,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:01:07,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:07,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:01:07,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:01:07,890 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-03-20 13:01:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:07,981 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-03-20 13:01:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:01:07,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2022-03-20 13:01:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:07,982 INFO L225 Difference]: With dead ends: 52 [2022-03-20 13:01:07,982 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 13:01:07,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:01:07,984 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:07,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 31 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:01:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 13:01:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-03-20 13:01:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:01:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-20 13:01:07,990 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-03-20 13:01:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:07,991 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-20 13:01:07,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-03-20 13:01:07,991 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-20 13:01:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 13:01:07,992 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:07,992 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:08,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 13:01:08,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:08,210 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:08,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1692936895, now seen corresponding path program 3 times [2022-03-20 13:01:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:08,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1518726286] [2022-03-20 13:01:08,213 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:08,213 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:08,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:08,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1692936895, now seen corresponding path program 4 times [2022-03-20 13:01:08,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:08,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35613925] [2022-03-20 13:01:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:08,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:08,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:08,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:01:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:08,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:01:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:01:08,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35613925] [2022-03-20 13:01:08,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35613925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:08,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504129955] [2022-03-20 13:01:08,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:01:08,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:08,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:08,324 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) [2022-03-20 13:01:08,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 13:01:08,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:01:08,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 13:01:08,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:08,463 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 [2022-03-20 13:01:08,717 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:08,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:08,983 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:01:08,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:01:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 13:01:09,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:11,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504129955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:11,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:01:11,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-03-20 13:01:11,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:11,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1518726286] [2022-03-20 13:01:11,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1518726286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:11,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:11,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:01:11,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920001636] [2022-03-20 13:01:11,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:11,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:01:11,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:11,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:01:11,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=471, Unknown=1, NotChecked=0, Total=552 [2022-03-20 13:01:11,425 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:01:11,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:11,537 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-03-20 13:01:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:01:11,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-03-20 13:01:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:11,539 INFO L225 Difference]: With dead ends: 60 [2022-03-20 13:01:11,539 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 13:01:11,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=97, Invalid=604, Unknown=1, NotChecked=0, Total=702 [2022-03-20 13:01:11,542 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:11,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:01:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 13:01:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2022-03-20 13:01:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:01:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-20 13:01:11,563 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 29 [2022-03-20 13:01:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:11,563 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-20 13:01:11,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:01:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-20 13:01:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 13:01:11,580 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:11,581 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:11,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:11,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 13:01:11,799 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:11,799 INFO L85 PathProgramCache]: Analyzing trace with hash 912079898, now seen corresponding path program 5 times [2022-03-20 13:01:11,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:11,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2103373332] [2022-03-20 13:01:11,806 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:11,806 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:11,806 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 912079898, now seen corresponding path program 6 times [2022-03-20 13:01:11,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:11,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445340520] [2022-03-20 13:01:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:11,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:11,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:11,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:01:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:11,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:01:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:11,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:01:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:01:11,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445340520] [2022-03-20 13:01:11,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445340520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753824892] [2022-03-20 13:01:11,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:01:11,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:11,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:11,947 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) [2022-03-20 13:01:11,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 13:01:12,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 13:01:12,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:12,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 13:01:12,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:12,101 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 [2022-03-20 13:01:12,306 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:12,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:12,675 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:12,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 13:01:12,972 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 13:01:12,972 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 35 treesize of output 22 [2022-03-20 13:01:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:01:13,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:17,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753824892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:17,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:01:17,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 16] total 21 [2022-03-20 13:01:17,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:17,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2103373332] [2022-03-20 13:01:17,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2103373332] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:17,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:17,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:01:17,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705682241] [2022-03-20 13:01:17,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:17,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:01:17,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:17,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:01:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=603, Unknown=2, NotChecked=0, Total=702 [2022-03-20 13:01:17,109 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:01:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:17,313 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-03-20 13:01:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:01:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-03-20 13:01:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:17,315 INFO L225 Difference]: With dead ends: 68 [2022-03-20 13:01:17,315 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 13:01:17,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=120, Invalid=808, Unknown=2, NotChecked=0, Total=930 [2022-03-20 13:01:17,316 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:17,316 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 42 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:01:17,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 13:01:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2022-03-20 13:01:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 13:01:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-03-20 13:01:17,322 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 37 [2022-03-20 13:01:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:17,322 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-03-20 13:01:17,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:01:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-03-20 13:01:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 13:01:17,323 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:17,323 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:17,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:17,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:17,535 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:17,536 INFO L85 PathProgramCache]: Analyzing trace with hash 42254965, now seen corresponding path program 7 times [2022-03-20 13:01:17,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:17,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1923379928] [2022-03-20 13:01:17,539 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:17,539 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:17,539 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:17,539 INFO L85 PathProgramCache]: Analyzing trace with hash 42254965, now seen corresponding path program 8 times [2022-03-20 13:01:17,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:17,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366127008] [2022-03-20 13:01:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:17,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:17,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:17,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:01:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:17,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:01:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:17,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:01:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:17,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:01:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 13:01:17,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:17,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366127008] [2022-03-20 13:01:17,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366127008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:17,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411685858] [2022-03-20 13:01:17,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:01:17,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:17,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:17,720 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) [2022-03-20 13:01:17,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 13:01:17,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:01:17,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:17,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 13:01:17,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:17,840 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 [2022-03-20 13:01:18,041 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:18,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:18,428 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:18,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:18,895 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:18,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:19,062 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:01:19,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:01:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 13:01:19,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:25,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411685858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:25,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:01:25,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16] total 21 [2022-03-20 13:01:25,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1923379928] [2022-03-20 13:01:25,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1923379928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:25,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:25,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:01:25,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134059110] [2022-03-20 13:01:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:25,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:01:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:01:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=650, Unknown=3, NotChecked=0, Total=756 [2022-03-20 13:01:25,463 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:01:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:25,740 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-03-20 13:01:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:01:25,741 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), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2022-03-20 13:01:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:25,742 INFO L225 Difference]: With dead ends: 76 [2022-03-20 13:01:25,742 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 13:01:25,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=133, Invalid=920, Unknown=3, NotChecked=0, Total=1056 [2022-03-20 13:01:25,743 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:25,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 50 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:01:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 13:01:25,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2022-03-20 13:01:25,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 13:01:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-20 13:01:25,749 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 45 [2022-03-20 13:01:25,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:25,750 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-20 13:01:25,750 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), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:01:25,750 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-20 13:01:25,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 13:01:25,751 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:25,751 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:25,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:25,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:25,964 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1041874384, now seen corresponding path program 9 times [2022-03-20 13:01:25,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:25,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1760017422] [2022-03-20 13:01:25,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:25,966 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:25,966 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:25,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1041874384, now seen corresponding path program 10 times [2022-03-20 13:01:25,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:25,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15525034] [2022-03-20 13:01:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:26,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:26,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:01:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:26,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:01:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:26,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:01:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:26,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:01:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:26,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:01:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 13:01:26,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:26,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15525034] [2022-03-20 13:01:26,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15525034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:26,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146685650] [2022-03-20 13:01:26,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:01:26,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:26,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:26,069 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) [2022-03-20 13:01:26,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 13:01:26,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:01:26,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:26,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 13:01:26,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:26,192 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 [2022-03-20 13:01:26,474 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:26,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:26,700 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:26,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:26,960 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:26,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:27,365 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:27,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:27,545 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:01:27,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:01:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 13:01:27,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:31,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146685650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:31,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:01:31,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16] total 22 [2022-03-20 13:01:31,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:31,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1760017422] [2022-03-20 13:01:31,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1760017422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:31,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:31,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:01:31,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746366050] [2022-03-20 13:01:31,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:31,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:01:31,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:31,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:01:31,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=611, Unknown=2, NotChecked=0, Total=702 [2022-03-20 13:01:31,384 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 13:01:31,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:31,696 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2022-03-20 13:01:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:01:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-03-20 13:01:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:31,707 INFO L225 Difference]: With dead ends: 84 [2022-03-20 13:01:31,707 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 13:01:31,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=124, Invalid=930, Unknown=2, NotChecked=0, Total=1056 [2022-03-20 13:01:31,710 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 65 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:31,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 63 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:01:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 13:01:31,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2022-03-20 13:01:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 13:01:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-03-20 13:01:31,717 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 53 [2022-03-20 13:01:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:31,717 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-03-20 13:01:31,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 13:01:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-03-20 13:01:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 13:01:31,718 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:31,718 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:31,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:31,922 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:31,922 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:31,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1926704683, now seen corresponding path program 11 times [2022-03-20 13:01:31,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:31,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1048016245] [2022-03-20 13:01:31,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:31,926 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:31,926 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1926704683, now seen corresponding path program 12 times [2022-03-20 13:01:31,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:31,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089415829] [2022-03-20 13:01:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:31,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:32,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:32,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:01:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:32,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:01:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:32,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:01:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:32,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:01:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:32,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:01:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:32,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:01:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 13:01:32,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089415829] [2022-03-20 13:01:32,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089415829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843319965] [2022-03-20 13:01:32,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:01:32,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:32,144 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) [2022-03-20 13:01:32,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 13:01:32,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 13:01:32,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:32,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 13:01:32,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:32,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-03-20 13:01:32,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-03-20 13:01:32,607 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-03-20 13:01:32,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 30 [2022-03-20 13:01:32,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 87 [2022-03-20 13:01:32,790 INFO L356 Elim1Store]: treesize reduction 116, result has 10.1 percent of original size [2022-03-20 13:01:32,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 122 [2022-03-20 13:01:32,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-03-20 13:01:32,932 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-03-20 13:01:32,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-03-20 13:01:33,170 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:33,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:33,393 INFO L356 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-03-20 13:01:33,394 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 41 treesize of output 44 [2022-03-20 13:01:33,662 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-03-20 13:01:33,663 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 55 treesize of output 50 [2022-03-20 13:01:34,449 INFO L356 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2022-03-20 13:01:34,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 49 [2022-03-20 13:01:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 13 proven. 91 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-20 13:01:34,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:41,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843319965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:41,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:01:41,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 26] total 33 [2022-03-20 13:01:41,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:41,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1048016245] [2022-03-20 13:01:41,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1048016245] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:41,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:41,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:01:41,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666966111] [2022-03-20 13:01:41,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:41,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:01:41,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:41,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:01:41,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1505, Unknown=3, NotChecked=0, Total=1806 [2022-03-20 13:01:41,018 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 13:01:41,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:41,369 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2022-03-20 13:01:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:01:41,370 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), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2022-03-20 13:01:41,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:41,371 INFO L225 Difference]: With dead ends: 92 [2022-03-20 13:01:41,371 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 13:01:41,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=377, Invalid=2070, Unknown=3, NotChecked=0, Total=2450 [2022-03-20 13:01:41,372 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 79 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:41,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 56 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:01:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 13:01:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 50. [2022-03-20 13:01:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 13:01:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-03-20 13:01:41,383 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 61 [2022-03-20 13:01:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:41,384 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-03-20 13:01:41,384 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), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 13:01:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-03-20 13:01:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 13:01:41,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:41,384 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:41,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 13:01:41,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:41,593 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:41,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1064833926, now seen corresponding path program 13 times [2022-03-20 13:01:41,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:41,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [132843663] [2022-03-20 13:01:41,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:41,596 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:41,596 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1064833926, now seen corresponding path program 14 times [2022-03-20 13:01:41,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:41,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519879987] [2022-03-20 13:01:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:41,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:41,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:41,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:01:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:41,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:01:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:41,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:01:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:41,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:01:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:41,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:01:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:41,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:01:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:41,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:01:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 13:01:41,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:41,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519879987] [2022-03-20 13:01:41,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519879987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:41,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306350995] [2022-03-20 13:01:41,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:01:41,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:41,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:41,732 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) [2022-03-20 13:01:41,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 13:01:41,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:01:41,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:41,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 13:01:41,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:41,866 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 [2022-03-20 13:01:42,047 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:42,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:42,410 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:42,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:42,779 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:42,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:43,006 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:43,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:43,224 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:43,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:43,427 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:43,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:43,743 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:01:43,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:01:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 13:01:43,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:47,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306350995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:47,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:01:47,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 24 [2022-03-20 13:01:47,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:47,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [132843663] [2022-03-20 13:01:47,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [132843663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:47,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:47,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:01:47,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635164884] [2022-03-20 13:01:47,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:47,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:01:47,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:47,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:01:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=663, Unknown=2, NotChecked=0, Total=756 [2022-03-20 13:01:47,610 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 13:01:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:48,060 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-03-20 13:01:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:01:48,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2022-03-20 13:01:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:48,062 INFO L225 Difference]: With dead ends: 100 [2022-03-20 13:01:48,062 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 13:01:48,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=138, Invalid=1120, Unknown=2, NotChecked=0, Total=1260 [2022-03-20 13:01:48,063 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 85 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:48,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 69 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 13:01:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2022-03-20 13:01:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 13:01:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-03-20 13:01:48,071 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 69 [2022-03-20 13:01:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:48,072 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-03-20 13:01:48,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 13:01:48,072 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-03-20 13:01:48,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 13:01:48,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:48,073 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:48,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:48,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:48,276 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:48,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1471639009, now seen corresponding path program 15 times [2022-03-20 13:01:48,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:48,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2039621503] [2022-03-20 13:01:48,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:48,278 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:48,278 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1471639009, now seen corresponding path program 16 times [2022-03-20 13:01:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:48,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877797211] [2022-03-20 13:01:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:48,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:48,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:48,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:01:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:48,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:01:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:48,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:01:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:48,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:01:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:48,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:01:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:48,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:01:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:48,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:01:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:48,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:01:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 13:01:48,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:48,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877797211] [2022-03-20 13:01:48,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877797211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:48,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143027317] [2022-03-20 13:01:48,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:01:48,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:48,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:48,436 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) [2022-03-20 13:01:48,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 13:01:48,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:01:48,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:48,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 13:01:48,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:48,573 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 [2022-03-20 13:01:48,793 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:48,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:48,997 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:48,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:49,318 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:49,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:49,547 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:49,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:50,018 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:50,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:50,354 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:50,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:50,687 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:50,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:50,956 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:01:50,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:01:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-20 13:01:51,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:54,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143027317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:54,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:01:54,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 25 [2022-03-20 13:01:54,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:54,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2039621503] [2022-03-20 13:01:54,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2039621503] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:54,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:54,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:01:54,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206081312] [2022-03-20 13:01:54,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:54,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:01:54,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:54,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:01:54,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=716, Unknown=2, NotChecked=0, Total=812 [2022-03-20 13:01:54,777 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 13:01:55,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:55,282 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-03-20 13:01:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:01:55,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2022-03-20 13:01:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:55,286 INFO L225 Difference]: With dead ends: 108 [2022-03-20 13:01:55,287 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 13:01:55,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 74 SyntacticMatches, 14 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=147, Invalid=1257, Unknown=2, NotChecked=0, Total=1406 [2022-03-20 13:01:55,287 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 93 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:55,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 77 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 13:01:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2022-03-20 13:01:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 13:01:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-03-20 13:01:55,299 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 77 [2022-03-20 13:01:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:55,299 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-03-20 13:01:55,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 13:01:55,299 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-03-20 13:01:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 13:01:55,300 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:55,301 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:55,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:55,515 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,SelfDestructingSolverStorable8 [2022-03-20 13:01:55,516 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2075116228, now seen corresponding path program 17 times [2022-03-20 13:01:55,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:55,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [567658029] [2022-03-20 13:01:55,518 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:55,518 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:55,518 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:55,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2075116228, now seen corresponding path program 18 times [2022-03-20 13:01:55,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:55,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199141437] [2022-03-20 13:01:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:55,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:55,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:55,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:01:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:55,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:01:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:55,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:01:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:55,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:01:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:55,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:01:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:55,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:01:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:55,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:01:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:55,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:01:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:55,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:01:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 13:01:55,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:55,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199141437] [2022-03-20 13:01:55,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199141437] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:55,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320917319] [2022-03-20 13:01:55,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:01:55,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:55,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:55,698 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) [2022-03-20 13:01:55,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 13:01:57,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 13:01:57,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:57,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 13:01:57,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:57,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-03-20 13:01:57,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-03-20 13:01:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 24 proven. 153 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-20 13:01:57,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:57,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-03-20 13:01:57,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 13:01:57,590 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 13:01:57,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-03-20 13:01:57,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 13:01:57,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 4 [2022-03-20 13:01:57,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 13:01:57,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 13:01:57,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 13:01:57,629 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 13:01:57,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 16 [2022-03-20 13:01:57,641 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 13:01:57,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2022-03-20 13:01:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 13:01:58,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320917319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:58,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:58,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 19] total 35 [2022-03-20 13:01:58,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:58,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [567658029] [2022-03-20 13:01:58,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [567658029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:58,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:58,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:01:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106931625] [2022-03-20 13:01:58,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:58,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:01:58,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:01:58,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 13:01:58,361 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 13:01:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:58,860 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2022-03-20 13:01:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:01:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2022-03-20 13:01:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:58,862 INFO L225 Difference]: With dead ends: 116 [2022-03-20 13:01:58,862 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 13:01:58,862 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=420, Invalid=1560, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 13:01:58,863 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 115 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:58,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 50 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 13:01:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 62. [2022-03-20 13:01:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 13:01:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-20 13:01:58,875 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 85 [2022-03-20 13:01:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:58,875 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-20 13:01:58,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 13:01:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-20 13:01:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 13:01:58,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:58,876 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:58,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:59,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 13:01:59,082 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:59,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1560444521, now seen corresponding path program 19 times [2022-03-20 13:01:59,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:59,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398892286] [2022-03-20 13:01:59,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:59,084 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:59,084 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1560444521, now seen corresponding path program 20 times [2022-03-20 13:01:59,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:59,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330972520] [2022-03-20 13:01:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:59,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:01:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:01:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:01:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:01:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:01:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:01:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:01:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:01:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:01:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:01:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 13:01:59,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:59,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330972520] [2022-03-20 13:01:59,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330972520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:59,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274708210] [2022-03-20 13:01:59,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:01:59,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:59,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:59,264 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) [2022-03-20 13:01:59,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 13:01:59,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:01:59,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:59,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 114 conjunts are in the unsatisfiable core [2022-03-20 13:01:59,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:59,399 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 [2022-03-20 13:01:59,613 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:59,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:01:59,828 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:01:59,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:00,047 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:00,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:00,238 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:00,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:00,433 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:00,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:00,648 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:00,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:00,840 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:00,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:01,053 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:01,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:01,294 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:01,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:01,447 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:02:01,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:02:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-20 13:02:01,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:05,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274708210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:05,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:02:05,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2022-03-20 13:02:05,153 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:05,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398892286] [2022-03-20 13:02:05,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398892286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:05,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:05,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:02:05,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241599125] [2022-03-20 13:02:05,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:05,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:02:05,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:02:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=886, Unknown=2, NotChecked=0, Total=992 [2022-03-20 13:02:05,155 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 13:02:05,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:05,944 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2022-03-20 13:02:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 13:02:05,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 93 [2022-03-20 13:02:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:05,946 INFO L225 Difference]: With dead ends: 124 [2022-03-20 13:02:05,946 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 13:02:05,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 92 SyntacticMatches, 15 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=169, Invalid=1635, Unknown=2, NotChecked=0, Total=1806 [2022-03-20 13:02:05,947 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 109 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:05,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 93 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:02:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 13:02:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2022-03-20 13:02:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 13:02:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-03-20 13:02:05,957 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 93 [2022-03-20 13:02:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:05,957 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-03-20 13:02:05,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 13:02:05,958 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-03-20 13:02:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 13:02:05,958 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:05,958 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:05,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:06,167 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,SelfDestructingSolverStorable10 [2022-03-20 13:02:06,168 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1501938958, now seen corresponding path program 21 times [2022-03-20 13:02:06,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:06,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2142102880] [2022-03-20 13:02:06,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:06,170 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:06,170 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:06,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1501938958, now seen corresponding path program 22 times [2022-03-20 13:02:06,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:06,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690725889] [2022-03-20 13:02:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:06,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:02:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:02:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:02:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:02:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:02:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:02:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:02:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:02:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:02:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:02:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:02:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 13:02:06,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:06,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690725889] [2022-03-20 13:02:06,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690725889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:06,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294429851] [2022-03-20 13:02:06,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:02:06,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:06,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:06,428 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) [2022-03-20 13:02:06,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 13:02:06,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:02:06,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:06,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 126 conjunts are in the unsatisfiable core [2022-03-20 13:02:06,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:06,551 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 [2022-03-20 13:02:06,772 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:06,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:06,946 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:06,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:07,272 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:07,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:07,497 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:07,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:07,818 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:07,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:08,171 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:08,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:08,492 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:08,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:08,896 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:08,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:09,102 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:09,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:09,320 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:09,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:09,611 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:02:09,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:02:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-03-20 13:02:09,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:11,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294429851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:11,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:02:11,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2022-03-20 13:02:11,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:11,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2142102880] [2022-03-20 13:02:11,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2142102880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:11,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:11,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 13:02:11,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923134423] [2022-03-20 13:02:11,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:11,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 13:02:11,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:11,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 13:02:11,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=888, Unknown=1, NotChecked=0, Total=992 [2022-03-20 13:02:11,970 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 13:02:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:12,763 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2022-03-20 13:02:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:02:12,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 101 [2022-03-20 13:02:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:12,765 INFO L225 Difference]: With dead ends: 132 [2022-03-20 13:02:12,765 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 13:02:12,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 100 SyntacticMatches, 18 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=174, Invalid=1717, Unknown=1, NotChecked=0, Total=1892 [2022-03-20 13:02:12,767 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 125 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:12,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 81 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:02:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 13:02:12,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 70. [2022-03-20 13:02:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 15 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 13:02:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-03-20 13:02:12,780 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 101 [2022-03-20 13:02:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:12,780 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-03-20 13:02:12,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 13:02:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-03-20 13:02:12,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 13:02:12,781 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:12,781 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:12,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:13,000 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,SelfDestructingSolverStorable11 [2022-03-20 13:02:13,001 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:13,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1769903795, now seen corresponding path program 23 times [2022-03-20 13:02:13,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:13,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1269324173] [2022-03-20 13:02:13,003 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:13,003 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:13,003 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:13,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1769903795, now seen corresponding path program 24 times [2022-03-20 13:02:13,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:13,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293410956] [2022-03-20 13:02:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:13,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:02:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:02:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:02:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:02:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:02:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:02:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:02:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:02:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:02:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:02:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:02:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:02:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 13:02:13,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:13,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293410956] [2022-03-20 13:02:13,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293410956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:13,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659434166] [2022-03-20 13:02:13,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:02:13,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:13,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:13,232 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) [2022-03-20 13:02:13,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 13:02:23,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 13:02:23,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 13:02:23,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:23,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-03-20 13:02:23,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-03-20 13:02:23,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-03-20 13:02:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-03-20 13:02:23,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:23,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-03-20 13:02:23,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 13:02:23,968 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 13:02:23,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-03-20 13:02:24,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 13:02:24,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 4 [2022-03-20 13:02:24,018 INFO L356 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-03-20 13:02:24,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 28 [2022-03-20 13:02:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 13:02:25,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659434166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:25,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:25,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 22] total 41 [2022-03-20 13:02:25,035 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:25,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1269324173] [2022-03-20 13:02:25,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1269324173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:25,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:25,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:02:25,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023877235] [2022-03-20 13:02:25,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:25,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:02:25,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:25,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:02:25,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 13:02:25,036 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 13:02:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:25,808 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2022-03-20 13:02:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:02:25,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 109 [2022-03-20 13:02:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:25,810 INFO L225 Difference]: With dead ends: 140 [2022-03-20 13:02:25,810 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 13:02:25,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=612, Invalid=2250, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 13:02:25,811 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 133 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:25,811 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 89 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:02:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 13:02:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 74. [2022-03-20 13:02:25,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 13:02:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-03-20 13:02:25,825 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 109 [2022-03-20 13:02:25,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:25,826 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-03-20 13:02:25,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 13:02:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-03-20 13:02:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 13:02:25,826 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:25,827 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:25,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:26,033 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,SelfDestructingSolverStorable12 [2022-03-20 13:02:26,034 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:26,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1882321752, now seen corresponding path program 25 times [2022-03-20 13:02:26,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:26,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [410344955] [2022-03-20 13:02:26,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:26,036 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:26,036 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:26,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1882321752, now seen corresponding path program 26 times [2022-03-20 13:02:26,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:26,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262173985] [2022-03-20 13:02:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:26,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:02:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:02:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:02:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:02:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:02:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:02:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:02:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:02:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:02:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:02:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:02:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:02:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:02:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 13:02:26,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:26,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262173985] [2022-03-20 13:02:26,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262173985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:26,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408426211] [2022-03-20 13:02:26,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:02:26,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:26,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:26,278 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) [2022-03-20 13:02:26,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 13:02:26,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:02:26,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:26,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 146 conjunts are in the unsatisfiable core [2022-03-20 13:02:26,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:26,430 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 [2022-03-20 13:02:26,738 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:26,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:26,985 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:26,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:27,201 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:27,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:27,489 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:27,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:27,709 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:27,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:27,891 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:27,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:28,193 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:28,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:28,394 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:28,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:28,688 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:28,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:28,913 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:28,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:29,077 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:29,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:29,224 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:29,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:29,372 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:02:29,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:02:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 48 proven. 37 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-20 13:02:29,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:33,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408426211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:33,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:02:33,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2022-03-20 13:02:33,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [410344955] [2022-03-20 13:02:33,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [410344955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:33,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:33,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:02:33,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104101552] [2022-03-20 13:02:33,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:33,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:02:33,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:02:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1011, Unknown=2, NotChecked=0, Total=1122 [2022-03-20 13:02:33,222 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 13:02:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:34,422 INFO L93 Difference]: Finished difference Result 148 states and 178 transitions. [2022-03-20 13:02:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:02:34,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 117 [2022-03-20 13:02:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:34,423 INFO L225 Difference]: With dead ends: 148 [2022-03-20 13:02:34,423 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 13:02:34,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 117 SyntacticMatches, 21 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=192, Invalid=2062, Unknown=2, NotChecked=0, Total=2256 [2022-03-20 13:02:34,424 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 129 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:34,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 127 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 13:02:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 13:02:34,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 78. [2022-03-20 13:02:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 13:02:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2022-03-20 13:02:34,438 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 117 [2022-03-20 13:02:34,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:34,438 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2022-03-20 13:02:34,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 13:02:34,438 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2022-03-20 13:02:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 13:02:34,439 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:34,439 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:34,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:34,642 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,SelfDestructingSolverStorable13 [2022-03-20 13:02:34,642 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1004854013, now seen corresponding path program 27 times [2022-03-20 13:02:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:34,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [426011917] [2022-03-20 13:02:34,645 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:34,645 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:34,645 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:34,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1004854013, now seen corresponding path program 28 times [2022-03-20 13:02:34,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:34,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643272859] [2022-03-20 13:02:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:34,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:02:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:02:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:02:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:02:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:02:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:02:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:02:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:02:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:02:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:02:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:02:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:02:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:02:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-20 13:02:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-20 13:02:34,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:34,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643272859] [2022-03-20 13:02:34,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643272859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:34,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765229310] [2022-03-20 13:02:34,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:02:34,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:34,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:34,903 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) [2022-03-20 13:02:34,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 13:02:35,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:02:35,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:35,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 150 conjunts are in the unsatisfiable core [2022-03-20 13:02:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:35,102 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 [2022-03-20 13:02:35,412 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:35,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:35,672 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:35,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:35,948 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:35,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:36,125 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:36,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:36,370 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:36,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:36,623 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:36,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:36,825 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:36,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:37,064 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:37,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:37,336 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:37,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:37,586 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:37,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:37,826 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:37,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:38,062 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:38,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:38,272 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:02:38,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:02:38,461 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:02:38,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:02:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 52 proven. 40 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-03-20 13:02:38,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:42,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765229310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:42,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:02:42,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2022-03-20 13:02:42,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:42,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [426011917] [2022-03-20 13:02:42,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [426011917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:42,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:42,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:02:42,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572523100] [2022-03-20 13:02:42,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:42,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:02:42,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:02:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1076, Unknown=2, NotChecked=0, Total=1190 [2022-03-20 13:02:42,271 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 13:02:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:43,370 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2022-03-20 13:02:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 13:02:43,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 125 [2022-03-20 13:02:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:43,372 INFO L225 Difference]: With dead ends: 156 [2022-03-20 13:02:43,372 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 13:02:43,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 122 SyntacticMatches, 26 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=201, Invalid=2247, Unknown=2, NotChecked=0, Total=2450 [2022-03-20 13:02:43,373 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:43,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 65 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 13:02:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 13:02:43,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 82. [2022-03-20 13:02:43,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 13:02:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2022-03-20 13:02:43,386 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 125 [2022-03-20 13:02:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:43,387 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2022-03-20 13:02:43,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 13:02:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2022-03-20 13:02:43,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 13:02:43,388 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:43,388 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:43,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:43,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:43,601 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2049159774, now seen corresponding path program 29 times [2022-03-20 13:02:43,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:43,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1040466624] [2022-03-20 13:02:43,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:43,607 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:43,607 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2049159774, now seen corresponding path program 30 times [2022-03-20 13:02:43,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:43,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382075425] [2022-03-20 13:02:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:43,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:02:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:02:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:02:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:02:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:02:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:02:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:02:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:02:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:02:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:02:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:02:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:02:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:02:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-20 13:02:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 13:02:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 13:02:43,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:43,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382075425] [2022-03-20 13:02:43,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382075425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:43,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029965248] [2022-03-20 13:02:43,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:02:43,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:43,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:43,885 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:43,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 13:05:35,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 13:05:35,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:35,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 13:05:35,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:35,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-03-20 13:05:35,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-03-20 13:05:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 13:05:35,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 11 [2022-03-20 13:05:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 42 proven. 435 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-20 13:05:35,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:36,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-03-20 13:05:36,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 13:05:36,063 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 13:05:36,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-03-20 13:05:36,084 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 13:05:36,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2022-03-20 13:05:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 13:05:37,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029965248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:37,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:37,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 25] total 47 [2022-03-20 13:05:37,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:37,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1040466624] [2022-03-20 13:05:37,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1040466624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:37,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:37,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 13:05:37,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887944335] [2022-03-20 13:05:37,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:37,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 13:05:37,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:37,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 13:05:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=1704, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 13:05:37,337 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 13:05:38,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:38,291 INFO L93 Difference]: Finished difference Result 164 states and 198 transitions. [2022-03-20 13:05:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 13:05:38,291 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 133 [2022-03-20 13:05:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:38,292 INFO L225 Difference]: With dead ends: 164 [2022-03-20 13:05:38,292 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 13:05:38,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=840, Invalid=3066, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 13:05:38,294 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 159 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:38,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 108 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 13:05:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 13:05:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 86. [2022-03-20 13:05:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 13:05:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-03-20 13:05:38,329 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 133 [2022-03-20 13:05:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:38,331 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-03-20 13:05:38,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 13:05:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-03-20 13:05:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 13:05:38,332 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:38,332 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:38,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 13:05:38,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 13:05:38,540 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash 228766905, now seen corresponding path program 31 times [2022-03-20 13:05:38,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:38,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1329109125] [2022-03-20 13:05:38,542 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:05:38,542 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:05:38,542 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:05:38,542 INFO L85 PathProgramCache]: Analyzing trace with hash 228766905, now seen corresponding path program 32 times [2022-03-20 13:05:38,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:38,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754040691] [2022-03-20 13:05:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:38,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:05:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:05:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:05:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:05:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:05:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:05:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:05:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:05:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:05:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:05:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:05:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:05:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:05:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-20 13:05:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 13:05:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 13:05:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 13:05:38,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:38,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754040691] [2022-03-20 13:05:38,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754040691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:38,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86218875] [2022-03-20 13:05:38,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:05:38,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:38,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:38,869 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:05:38,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 13:05:38,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:05:38,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:38,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 178 conjunts are in the unsatisfiable core [2022-03-20 13:05:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:39,068 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 [2022-03-20 13:05:39,340 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:39,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:39,610 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:39,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:39,854 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:39,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:40,227 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:40,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:40,411 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:40,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:40,567 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:40,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:40,747 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:40,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:40,925 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:40,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:41,145 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:41,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:41,499 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:41,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:41,700 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:41,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:41,897 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:41,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:42,091 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:42,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:42,310 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:42,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:42,491 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:42,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:42,723 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:05:42,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:05:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 60 proven. 46 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-20 13:05:42,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:50,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86218875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:50,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:05:50,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2022-03-20 13:05:50,844 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:50,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1329109125] [2022-03-20 13:05:50,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1329109125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:50,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:50,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 13:05:50,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676782043] [2022-03-20 13:05:50,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:50,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 13:05:50,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:50,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 13:05:50,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1344, Unknown=3, NotChecked=0, Total=1482 [2022-03-20 13:05:50,845 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 13:05:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:52,059 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2022-03-20 13:05:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 13:05:52,059 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 141 [2022-03-20 13:05:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:52,060 INFO L225 Difference]: With dead ends: 172 [2022-03-20 13:05:52,060 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 13:05:52,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 147 SyntacticMatches, 27 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=237, Invalid=2840, Unknown=3, NotChecked=0, Total=3080 [2022-03-20 13:05:52,061 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 183 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:52,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 76 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 13:05:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 13:05:52,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 90. [2022-03-20 13:05:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 20 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 13:05:52,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2022-03-20 13:05:52,077 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 141 [2022-03-20 13:05:52,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:52,077 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2022-03-20 13:05:52,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 13:05:52,078 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2022-03-20 13:05:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 13:05:52,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:52,078 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:52,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 13:05:52,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 13:05:52,288 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash -279761900, now seen corresponding path program 33 times [2022-03-20 13:05:52,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:52,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1434945067] [2022-03-20 13:05:52,290 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:05:52,290 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:05:52,290 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:05:52,290 INFO L85 PathProgramCache]: Analyzing trace with hash -279761900, now seen corresponding path program 34 times [2022-03-20 13:05:52,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:52,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965165947] [2022-03-20 13:05:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:52,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:05:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:05:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:05:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:05:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:05:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:05:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:05:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:05:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:05:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:05:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:05:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:05:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:05:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-20 13:05:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 13:05:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 13:05:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-20 13:05:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 13:05:52,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:52,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965165947] [2022-03-20 13:05:52,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965165947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:52,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465518729] [2022-03-20 13:05:52,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:05:52,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:52,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:52,564 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:05:52,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 13:05:52,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:05:52,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:52,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 182 conjunts are in the unsatisfiable core [2022-03-20 13:05:52,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:52,740 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 [2022-03-20 13:05:53,032 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:53,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:53,248 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:53,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:53,511 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:53,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:53,790 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:53,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:54,069 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:54,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:54,350 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:54,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:54,561 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:54,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:54,781 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:54,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:55,086 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:55,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:55,279 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:55,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:55,439 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:55,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:55,745 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:55,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:55,962 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:55,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:56,317 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:56,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:56,632 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:56,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:56,824 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:05:56,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:05:56,986 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:05:56,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:05:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-03-20 13:05:57,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:01,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465518729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:01,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:06:01,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2022-03-20 13:06:01,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:01,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1434945067] [2022-03-20 13:06:01,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1434945067] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:01,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:01,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:06:01,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201743818] [2022-03-20 13:06:01,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:01,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 13:06:01,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:01,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 13:06:01,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1355, Unknown=2, NotChecked=0, Total=1482 [2022-03-20 13:06:01,196 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 13:06:02,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:02,763 INFO L93 Difference]: Finished difference Result 180 states and 218 transitions. [2022-03-20 13:06:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 13:06:02,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 149 [2022-03-20 13:06:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:02,766 INFO L225 Difference]: With dead ends: 180 [2022-03-20 13:06:02,767 INFO L226 Difference]: Without dead ends: 169 [2022-03-20 13:06:02,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 146 SyntacticMatches, 31 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=232, Invalid=2958, Unknown=2, NotChecked=0, Total=3192 [2022-03-20 13:06:02,768 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 193 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:02,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 79 Invalid, 2678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2464 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 13:06:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-20 13:06:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 94. [2022-03-20 13:06:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 13:06:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2022-03-20 13:06:02,799 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 149 [2022-03-20 13:06:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:02,799 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2022-03-20 13:06:02,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 13:06:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2022-03-20 13:06:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 13:06:02,800 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:02,800 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:02,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-20 13:06:03,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 13:06:03,008 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1527768977, now seen corresponding path program 35 times [2022-03-20 13:06:03,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:03,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [626664569] [2022-03-20 13:06:03,010 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:06:03,010 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:06:03,010 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:06:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1527768977, now seen corresponding path program 36 times [2022-03-20 13:06:03,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:03,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869215204] [2022-03-20 13:06:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:03,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:06:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:06:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:06:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:06:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:06:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:06:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:06:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:06:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:06:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:06:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:06:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:06:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:06:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-20 13:06:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 13:06:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 13:06:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-20 13:06:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-20 13:06:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 13:06:03,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:03,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869215204] [2022-03-20 13:06:03,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869215204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:03,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654842514] [2022-03-20 13:06:03,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:06:03,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:03,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:03,346 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:06:03,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 13:07:07,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 13:07:07,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-20 13:07:07,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:07,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-03-20 13:07:07,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-03-20 13:07:07,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 87 [2022-03-20 13:07:07,929 INFO L356 Elim1Store]: treesize reduction 116, result has 10.1 percent of original size [2022-03-20 13:07:07,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 122 [2022-03-20 13:07:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 13:07:07,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 11 [2022-03-20 13:07:08,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-03-20 13:07:08,122 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-03-20 13:07:08,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-03-20 13:07:08,148 INFO L356 Elim1Store]: treesize reduction 145, result has 4.6 percent of original size [2022-03-20 13:07:08,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 87 treesize of output 36 [2022-03-20 13:07:08,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-03-20 13:07:08,298 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-03-20 13:07:08,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-03-20 13:07:08,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-03-20 13:07:08,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-03-20 13:07:08,481 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-03-20 13:07:08,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-03-20 13:07:08,500 INFO L356 Elim1Store]: treesize reduction 145, result has 4.6 percent of original size [2022-03-20 13:07:08,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 87 treesize of output 36 [2022-03-20 13:07:08,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-03-20 13:07:08,661 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-03-20 13:07:08,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-03-20 13:07:08,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 13:07:08,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 11 [2022-03-20 13:07:08,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-03-20 13:07:08,857 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-03-20 13:07:08,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-03-20 13:07:08,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 13:07:08,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 11 [2022-03-20 13:07:09,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-03-20 13:07:09,066 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-03-20 13:07:09,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-03-20 13:07:09,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-03-20 13:07:09,276 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-03-20 13:07:09,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-03-20 13:07:09,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-03-20 13:07:09,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-03-20 13:07:09,510 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-03-20 13:07:09,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-03-20 13:07:09,532 INFO L356 Elim1Store]: treesize reduction 145, result has 4.6 percent of original size [2022-03-20 13:07:09,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 87 treesize of output 36 [2022-03-20 13:07:09,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 72 [2022-03-20 13:07:09,812 INFO L356 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2022-03-20 13:07:09,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 115 [2022-03-20 13:07:09,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 13:07:09,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 11 [2022-03-20 13:07:10,282 INFO L356 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2022-03-20 13:07:10,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 56 [2022-03-20 13:07:10,644 INFO L356 Elim1Store]: treesize reduction 56, result has 37.1 percent of original size [2022-03-20 13:07:10,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 76 [2022-03-20 13:07:11,208 INFO L356 Elim1Store]: treesize reduction 64, result has 28.1 percent of original size [2022-03-20 13:07:11,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 88 [2022-03-20 13:07:11,949 INFO L356 Elim1Store]: treesize reduction 64, result has 28.1 percent of original size [2022-03-20 13:07:11,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 97 [2022-03-20 13:07:12,903 INFO L356 Elim1Store]: treesize reduction 64, result has 28.1 percent of original size [2022-03-20 13:07:12,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 106 [2022-03-20 13:07:14,116 INFO L356 Elim1Store]: treesize reduction 64, result has 28.1 percent of original size [2022-03-20 13:07:14,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 115 [2022-03-20 13:07:16,455 INFO L356 Elim1Store]: treesize reduction 72, result has 25.8 percent of original size [2022-03-20 13:07:16,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 128 [2022-03-20 13:07:18,815 INFO L356 Elim1Store]: treesize reduction 112, result has 2.6 percent of original size [2022-03-20 13:07:18,815 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 127 treesize of output 64 [2022-03-20 13:07:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 163 proven. 733 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 13:07:19,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:27,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654842514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:27,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:07:27,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 49] total 68 [2022-03-20 13:07:27,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:27,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [626664569] [2022-03-20 13:07:27,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [626664569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:27,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:27,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 13:07:27,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650643651] [2022-03-20 13:07:27,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:27,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 13:07:27,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:27,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 13:07:27,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=6152, Unknown=7, NotChecked=0, Total=7310 [2022-03-20 13:07:27,067 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 20 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 13:07:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:28,794 INFO L93 Difference]: Finished difference Result 188 states and 228 transitions. [2022-03-20 13:07:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 13:07:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 20 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 157 [2022-03-20 13:07:28,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:28,795 INFO L225 Difference]: With dead ends: 188 [2022-03-20 13:07:28,795 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 13:07:28,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 141 SyntacticMatches, 48 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4749 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1510, Invalid=9403, Unknown=7, NotChecked=0, Total=10920 [2022-03-20 13:07:28,798 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 181 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 3472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:28,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 137 Invalid, 3472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 13:07:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 13:07:28,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 98. [2022-03-20 13:07:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 22 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 13:07:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2022-03-20 13:07:28,817 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 157 [2022-03-20 13:07:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:28,817 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2022-03-20 13:07:28,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 20 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 13:07:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2022-03-20 13:07:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 13:07:28,818 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:28,818 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:28,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 13:07:29,030 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:29,031 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:29,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:29,031 INFO L85 PathProgramCache]: Analyzing trace with hash -919307830, now seen corresponding path program 37 times [2022-03-20 13:07:29,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:29,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1459970441] [2022-03-20 13:07:29,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:07:29,033 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:07:29,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:07:29,033 INFO L85 PathProgramCache]: Analyzing trace with hash -919307830, now seen corresponding path program 38 times [2022-03-20 13:07:29,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:29,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161619650] [2022-03-20 13:07:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:29,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:07:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:07:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:07:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:07:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:07:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:07:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:07:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:07:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:07:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:07:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:07:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:07:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:07:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-20 13:07:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 13:07:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 13:07:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-20 13:07:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-20 13:07:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-20 13:07:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-20 13:07:29,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:29,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161619650] [2022-03-20 13:07:29,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161619650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:29,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921825539] [2022-03-20 13:07:29,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:07:29,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:29,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:29,378 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:07:29,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 13:07:29,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:07:29,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:29,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 208 conjunts are in the unsatisfiable core [2022-03-20 13:07:29,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:29,603 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 [2022-03-20 13:07:29,896 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:29,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:30,104 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:30,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:30,350 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:30,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:30,597 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:30,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:30,922 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:30,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:31,206 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:31,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:31,418 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:31,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:31,706 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:31,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:32,007 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:32,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:32,342 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:32,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:32,724 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:32,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:32,980 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:32,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:33,187 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:33,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:33,439 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:33,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:33,649 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:33,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:33,900 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:33,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:34,109 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:34,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:34,389 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:34,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:34,566 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:07:34,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:07:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 72 proven. 55 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-20 13:07:34,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:38,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921825539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:38,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:07:38,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 36 [2022-03-20 13:07:38,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:38,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1459970441] [2022-03-20 13:07:38,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1459970441] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:38,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:38,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:07:38,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848797620] [2022-03-20 13:07:38,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:38,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 13:07:38,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 13:07:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1507, Unknown=2, NotChecked=0, Total=1640 [2022-03-20 13:07:38,371 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 21 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 13:07:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:40,197 INFO L93 Difference]: Finished difference Result 196 states and 238 transitions. [2022-03-20 13:07:40,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 13:07:40,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 21 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 165 [2022-03-20 13:07:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:40,198 INFO L225 Difference]: With dead ends: 196 [2022-03-20 13:07:40,198 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 13:07:40,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 162 SyntacticMatches, 35 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=250, Invalid=3408, Unknown=2, NotChecked=0, Total=3660 [2022-03-20 13:07:40,200 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 197 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3446 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 3668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 3446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:40,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 125 Invalid, 3668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 3446 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 13:07:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 13:07:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 102. [2022-03-20 13:07:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 23 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 13:07:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2022-03-20 13:07:40,219 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 165 [2022-03-20 13:07:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:40,220 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2022-03-20 13:07:40,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 21 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 13:07:40,220 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2022-03-20 13:07:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 13:07:40,220 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:40,220 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:40,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 13:07:40,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:40,431 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:40,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:40,431 INFO L85 PathProgramCache]: Analyzing trace with hash 198922277, now seen corresponding path program 39 times [2022-03-20 13:07:40,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:40,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1285335856] [2022-03-20 13:07:40,434 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:07:40,434 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:07:40,434 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:07:40,434 INFO L85 PathProgramCache]: Analyzing trace with hash 198922277, now seen corresponding path program 40 times [2022-03-20 13:07:40,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:40,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040959455] [2022-03-20 13:07:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:40,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:07:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:07:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:07:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:07:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:07:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:07:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:07:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:07:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:07:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:07:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:07:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:07:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:07:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-20 13:07:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 13:07:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 13:07:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-20 13:07:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-20 13:07:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-20 13:07:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-03-20 13:07:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-20 13:07:40,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:40,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040959455] [2022-03-20 13:07:40,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040959455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:40,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697757471] [2022-03-20 13:07:40,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:07:40,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:40,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:40,888 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:07:40,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 13:07:41,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:07:41,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:41,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 212 conjunts are in the unsatisfiable core [2022-03-20 13:07:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:41,125 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 [2022-03-20 13:07:41,428 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:41,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:41,682 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:41,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:41,944 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:41,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:42,204 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:42,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:42,468 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:42,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:42,729 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:42,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:42,932 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:42,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:43,207 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:43,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:43,481 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:43,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:43,746 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:43,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:44,107 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:44,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:44,277 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:44,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:44,456 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:44,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:44,667 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:44,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:44,871 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:44,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:45,039 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:45,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:45,376 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:45,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:45,805 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:45,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:46,086 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:07:46,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:07:46,266 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:07:46,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:07:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 76 proven. 58 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-03-20 13:07:46,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:50,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697757471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:50,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:07:50,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16] total 37 [2022-03-20 13:07:50,127 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:50,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1285335856] [2022-03-20 13:07:50,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1285335856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:50,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:50,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 13:07:50,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170445542] [2022-03-20 13:07:50,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:50,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 13:07:50,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:50,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 13:07:50,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1586, Unknown=2, NotChecked=0, Total=1722 [2022-03-20 13:07:50,128 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 22 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 13:07:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:51,955 INFO L93 Difference]: Finished difference Result 204 states and 248 transitions. [2022-03-20 13:07:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 13:07:51,955 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 22 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 173 [2022-03-20 13:07:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:51,956 INFO L225 Difference]: With dead ends: 204 [2022-03-20 13:07:51,956 INFO L226 Difference]: Without dead ends: 193 [2022-03-20 13:07:51,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 171 SyntacticMatches, 36 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=259, Invalid=3645, Unknown=2, NotChecked=0, Total=3906 [2022-03-20 13:07:51,957 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 217 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3526 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:51,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 103 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3526 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 13:07:51,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-20 13:07:51,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 106. [2022-03-20 13:07:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 24 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 13:07:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2022-03-20 13:07:51,979 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 173 [2022-03-20 13:07:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:51,979 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2022-03-20 13:07:51,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 22 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 13:07:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2022-03-20 13:07:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-20 13:07:51,980 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:51,980 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:52,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 13:07:52,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 13:07:52,191 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:52,192 INFO L85 PathProgramCache]: Analyzing trace with hash 832543616, now seen corresponding path program 41 times [2022-03-20 13:07:52,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:52,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1364997793] [2022-03-20 13:07:52,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:07:52,203 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:07:52,203 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:07:52,203 INFO L85 PathProgramCache]: Analyzing trace with hash 832543616, now seen corresponding path program 42 times [2022-03-20 13:07:52,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:52,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971865794] [2022-03-20 13:07:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:52,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:07:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:07:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:07:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:07:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:07:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:07:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:07:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:07:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:07:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:07:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:07:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:07:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:07:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-20 13:07:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 13:07:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 13:07:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-20 13:07:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-20 13:07:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-20 13:07:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-03-20 13:07:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-03-20 13:07:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-20 13:07:52,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:52,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971865794] [2022-03-20 13:07:52,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971865794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:52,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291402798] [2022-03-20 13:07:52,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:07:52,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:52,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:52,664 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:07:52,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 13:15:01,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 13:15:01,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:15:01,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 13:15:01,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:15:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-20 13:15:01,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:15:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-20 13:15:04,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291402798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:15:04,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:15:04,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 26] total 50 [2022-03-20 13:15:04,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:15:04,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1364997793] [2022-03-20 13:15:04,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1364997793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:15:04,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:15:04,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:15:04,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196189754] [2022-03-20 13:15:04,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:15:04,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:15:04,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:15:04,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:15:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=1781, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 13:15:04,115 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 23 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 13:15:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:15:06,130 INFO L93 Difference]: Finished difference Result 212 states and 258 transitions. [2022-03-20 13:15:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 13:15:06,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 23 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 181 [2022-03-20 13:15:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:15:06,133 INFO L225 Difference]: With dead ends: 212 [2022-03-20 13:15:06,133 INFO L226 Difference]: Without dead ends: 201 [2022-03-20 13:15:06,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 380 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1305, Invalid=3807, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 13:15:06,134 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 201 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4556 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 4786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 4556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:15:06,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 171 Invalid, 4786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 4556 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 13:15:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-20 13:15:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 110. [2022-03-20 13:15:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 13:15:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2022-03-20 13:15:06,163 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 181 [2022-03-20 13:15:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:15:06,163 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2022-03-20 13:15:06,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 23 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 13:15:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2022-03-20 13:15:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-20 13:15:06,164 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:15:06,164 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:15:06,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 13:15:06,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 13:15:06,376 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:15:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:15:06,377 INFO L85 PathProgramCache]: Analyzing trace with hash 339499995, now seen corresponding path program 43 times [2022-03-20 13:15:06,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:15:06,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1578133009] [2022-03-20 13:15:06,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:15:06,379 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:15:06,379 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:15:06,379 INFO L85 PathProgramCache]: Analyzing trace with hash 339499995, now seen corresponding path program 44 times [2022-03-20 13:15:06,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:15:06,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725641030] [2022-03-20 13:15:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:15:06,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:15:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:15:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:15:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:15:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:15:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:15:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:15:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:15:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:15:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:15:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:15:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:15:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:15:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:15:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:15:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-20 13:15:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 13:15:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 13:15:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-20 13:15:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-20 13:15:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-20 13:15:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-03-20 13:15:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-03-20 13:15:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-20 13:15:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1870 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-20 13:15:06,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:15:06,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725641030] [2022-03-20 13:15:06,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725641030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:15:06,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972672348] [2022-03-20 13:15:06,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:15:06,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:15:06,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:15:06,846 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:15:06,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 13:15:07,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:15:07,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:15:07,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 240 conjunts are in the unsatisfiable core [2022-03-20 13:15:07,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:15:07,106 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 [2022-03-20 13:15:07,474 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:07,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:07,692 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:07,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:07,855 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:07,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:08,190 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:08,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:08,410 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:08,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:08,789 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:08,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:09,096 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:09,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:09,382 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:09,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:09,702 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:09,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:10,090 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:10,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:10,315 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:10,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:10,658 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:10,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:10,959 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:10,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:11,179 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:11,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:11,407 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:11,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:11,678 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:11,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:11,932 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:11,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:12,322 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:12,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:12,520 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:12,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:12,794 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:12,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:13,089 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:13,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:13,452 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:15:13,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:15:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1870 backedges. 84 proven. 64 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-20 13:15:13,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:15:17,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972672348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:15:17,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:15:17,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 39 [2022-03-20 13:15:17,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:15:17,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1578133009] [2022-03-20 13:15:17,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1578133009] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:15:17,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:15:17,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 13:15:17,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689903338] [2022-03-20 13:15:17,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:15:17,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 13:15:17,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:15:17,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 13:15:17,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1668, Unknown=2, NotChecked=0, Total=1806 [2022-03-20 13:15:17,536 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 26 states, 26 states have (on average 3.0) internal successors, (78), 25 states have internal predecessors, (78), 24 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 13:15:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:15:19,783 INFO L93 Difference]: Finished difference Result 220 states and 268 transitions. [2022-03-20 13:15:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 13:15:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 25 states have internal predecessors, (78), 24 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 189 [2022-03-20 13:15:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:15:19,784 INFO L225 Difference]: With dead ends: 220 [2022-03-20 13:15:19,785 INFO L226 Difference]: Without dead ends: 209 [2022-03-20 13:15:19,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 189 SyntacticMatches, 39 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=273, Invalid=4015, Unknown=2, NotChecked=0, Total=4290 [2022-03-20 13:15:19,785 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 211 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4939 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 5181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 4939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:15:19,785 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 174 Invalid, 5181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 4939 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 13:15:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-20 13:15:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 114. [2022-03-20 13:15:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 13:15:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-03-20 13:15:19,811 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 189 [2022-03-20 13:15:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:15:19,811 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-03-20 13:15:19,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 25 states have internal predecessors, (78), 24 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 13:15:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-03-20 13:15:19,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-20 13:15:19,812 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:15:19,812 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:15:19,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 13:15:20,030 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:15:20,030 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:15:20,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:15:20,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1569943242, now seen corresponding path program 45 times [2022-03-20 13:15:20,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:15:20,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1214306047] [2022-03-20 13:15:20,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:15:20,034 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:15:20,034 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:15:20,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1569943242, now seen corresponding path program 46 times [2022-03-20 13:15:20,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:15:20,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354470621] [2022-03-20 13:15:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:15:20,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:15:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:15:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:15:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:15:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:15:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:15:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:15:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:15:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:15:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:15:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:15:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:15:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:15:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:15:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:15:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-20 13:15:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 13:15:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 13:15:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-20 13:15:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-20 13:15:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-20 13:15:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-03-20 13:15:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-03-20 13:15:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-20 13:15:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-03-20 13:15:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-20 13:15:20,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:15:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354470621] [2022-03-20 13:15:20,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354470621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:15:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035764003] [2022-03-20 13:15:20,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:15:20,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:15:20,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:15:20,513 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:15:20,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 13:15:20,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:15:20,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:15:20,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 250 conjunts are in the unsatisfiable core [2022-03-20 13:15:20,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:15:20,764 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 [2022-03-20 13:15:21,084 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:21,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:21,469 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:21,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:21,667 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:21,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:21,894 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:21,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:22,136 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:22,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:22,464 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:22,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:22,754 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:22,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:23,041 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:23,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:23,246 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:23,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:23,638 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:23,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:23,893 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:23,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:24,120 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:24,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:24,301 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:24,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:24,682 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:24,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:25,074 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:25,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:25,309 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:25,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:25,555 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:25,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:25,767 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:25,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:25,983 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:25,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:26,265 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:26,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:26,499 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:26,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:26,788 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 13:15:26,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-20 13:15:27,023 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 13:15:27,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-20 13:15:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 88 proven. 67 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-03-20 13:15:27,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:15:35,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035764003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:15:35,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:15:35,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 40 [2022-03-20 13:15:35,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:15:35,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1214306047] [2022-03-20 13:15:35,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1214306047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:15:35,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:15:35,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:15:35,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338895966] [2022-03-20 13:15:35,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:15:35,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:15:35,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:15:35,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:15:35,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1912, Unknown=2, NotChecked=0, Total=2070 [2022-03-20 13:15:35,756 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 25 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 13:15:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:15:38,005 INFO L93 Difference]: Finished difference Result 228 states and 278 transitions. [2022-03-20 13:15:38,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 13:15:38,005 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 25 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 197 [2022-03-20 13:15:38,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:15:38,007 INFO L225 Difference]: With dead ends: 228 [2022-03-20 13:15:38,007 INFO L226 Difference]: Without dead ends: 217 [2022-03-20 13:15:38,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 204 SyntacticMatches, 40 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=300, Invalid=4528, Unknown=2, NotChecked=0, Total=4830 [2022-03-20 13:15:38,008 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 247 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4597 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 4877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 4597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:15:38,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 112 Invalid, 4877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 4597 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 13:15:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-20 13:15:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 118. [2022-03-20 13:15:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 27 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 13:15:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2022-03-20 13:15:38,036 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 197 [2022-03-20 13:15:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:15:38,036 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2022-03-20 13:15:38,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 25 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 13:15:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2022-03-20 13:15:38,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 13:15:38,038 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:15:38,038 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:15:38,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 13:15:38,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:15:38,251 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:15:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:15:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash -538231919, now seen corresponding path program 47 times [2022-03-20 13:15:38,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:15:38,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1894369776] [2022-03-20 13:15:38,254 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:15:38,254 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:15:38,254 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:15:38,254 INFO L85 PathProgramCache]: Analyzing trace with hash -538231919, now seen corresponding path program 48 times [2022-03-20 13:15:38,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:15:38,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861972847] [2022-03-20 13:15:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:15:38,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:15:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:15:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:15:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 13:15:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:15:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 13:15:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 13:15:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 13:15:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:15:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 13:15:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-20 13:15:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 13:15:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:15:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:15:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 13:15:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-20 13:15:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 13:15:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 13:15:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-20 13:15:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-20 13:15:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-20 13:15:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-03-20 13:15:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-03-20 13:15:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-20 13:15:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-03-20 13:15:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-03-20 13:15:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:15:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-20 13:15:38,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:15:38,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861972847] [2022-03-20 13:15:38,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861972847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:15:38,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435325157] [2022-03-20 13:15:38,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:15:38,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:15:38,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:15:38,772 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:15:38,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process