/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:45:31,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:45:31,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:45:31,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:45:31,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 00:45:31,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 00:45:31,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 00:45:31,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:45:31,436 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:45:31,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:45:31,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:45:31,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:45:31,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:45:31,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:45:31,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:45:31,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:45:31,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:45:31,439 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:45:31,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:45:31,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:45:31,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:45:31,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:45:31,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:45:31,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:45:31,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:45:31,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:45:31,440 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:45:31,440 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:45:31,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:45:31,440 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:45:31,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:45:31,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:45:31,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:45:31,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:45:31,612 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:45:31,613 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:45:31,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-03-18 00:45:31,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481303162/2e2385b8dfb74ddcadc497114f262e68/FLAG9fd01f170 [2022-03-18 00:45:32,073 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:45:32,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-03-18 00:45:32,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481303162/2e2385b8dfb74ddcadc497114f262e68/FLAG9fd01f170 [2022-03-18 00:45:32,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481303162/2e2385b8dfb74ddcadc497114f262e68 [2022-03-18 00:45:32,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:45:32,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:45:32,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:45:32,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:45:32,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:45:32,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:45:32" (1/1) ... [2022-03-18 00:45:32,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df72e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:32, skipping insertion in model container [2022-03-18 00:45:32,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:45:32" (1/1) ... [2022-03-18 00:45:32,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:45:32,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:45:32,220 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c[311,324] [2022-03-18 00:45:32,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:45:32,234 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:45:32,241 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c[311,324] [2022-03-18 00:45:32,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:45:32,250 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:45:32,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:32 WrapperNode [2022-03-18 00:45:32,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:45:32,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:45:32,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:45:32,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:45:32,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:32" (1/1) ... [2022-03-18 00:45:32,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:32" (1/1) ... [2022-03-18 00:45:32,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:32" (1/1) ... [2022-03-18 00:45:32,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:32" (1/1) ... [2022-03-18 00:45:32,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:32" (1/1) ... [2022-03-18 00:45:32,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:32" (1/1) ... [2022-03-18 00:45:32,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:32" (1/1) ... [2022-03-18 00:45:32,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:45:32,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:45:32,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:45:32,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:45:32,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:32" (1/1) ... [2022-03-18 00:45:32,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:45:32,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:32,297 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) [2022-03-18 00:45:32,302 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 [2022-03-18 00:45:32,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:45:32,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:45:32,330 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:45:32,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:45:32,330 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:45:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:45:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:45:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:45:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:45:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:45:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:45:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:45:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:45:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:45:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:45:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:45:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:45:32,377 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:45:32,378 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:45:32,443 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:45:32,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:45:32,448 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 00:45:32,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:45:32 BoogieIcfgContainer [2022-03-18 00:45:32,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:45:32,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:45:32,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:45:32,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:45:32,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:45:32" (1/3) ... [2022-03-18 00:45:32,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbaf289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:45:32, skipping insertion in model container [2022-03-18 00:45:32,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:32" (2/3) ... [2022-03-18 00:45:32,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbaf289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:45:32, skipping insertion in model container [2022-03-18 00:45:32,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:45:32" (3/3) ... [2022-03-18 00:45:32,464 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2022-03-18 00:45:32,468 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:45:32,468 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:45:32,517 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:45:32,521 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 [2022-03-18 00:45:32,521 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:45:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:45:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:45:32,535 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:32,535 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:32,536 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:32,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 1 times [2022-03-18 00:45:32,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:32,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630157922] [2022-03-18 00:45:32,553 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:45:32,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 2 times [2022-03-18 00:45:32,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:32,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619922497] [2022-03-18 00:45:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:32,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:32,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:32,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:32,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619922497] [2022-03-18 00:45:32,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619922497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:32,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:32,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:45:32,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:32,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630157922] [2022-03-18 00:45:32,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630157922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:32,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:32,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:45:32,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479332864] [2022-03-18 00:45:32,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:32,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:45:32,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:32,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:45:32,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:45:32,700 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-18 00:45:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:32,724 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-18 00:45:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:45:32,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-03-18 00:45:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:32,729 INFO L225 Difference]: With dead ends: 32 [2022-03-18 00:45:32,729 INFO L226 Difference]: Without dead ends: 13 [2022-03-18 00:45:32,731 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:45:32,733 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:32,734 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:32,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-18 00:45:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-18 00:45:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-18 00:45:32,755 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-18 00:45:32,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:32,755 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-18 00:45:32,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-18 00:45:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-18 00:45:32,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:45:32,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:32,756 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:32,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:45:32,756 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:32,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-03-18 00:45:32,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:32,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008393389] [2022-03-18 00:45:32,758 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:45:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 2 times [2022-03-18 00:45:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:32,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719738076] [2022-03-18 00:45:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:32,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:32,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:32,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:32,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719738076] [2022-03-18 00:45:32,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719738076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:32,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:32,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:32,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:32,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008393389] [2022-03-18 00:45:32,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008393389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:32,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:32,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:32,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703219809] [2022-03-18 00:45:32,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:32,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:45:32,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:32,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:45:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:45:32,806 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-18 00:45:32,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:32,832 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-18 00:45:32,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:45:32,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-03-18 00:45:32,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:32,833 INFO L225 Difference]: With dead ends: 22 [2022-03-18 00:45:32,833 INFO L226 Difference]: Without dead ends: 15 [2022-03-18 00:45:32,833 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:45:32,834 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:32,835 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-18 00:45:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-18 00:45:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-18 00:45:32,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-18 00:45:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:32,839 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-18 00:45:32,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-18 00:45:32,840 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-18 00:45:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 00:45:32,840 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:32,840 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:32,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:45:32,840 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:32,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:32,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1372110560, now seen corresponding path program 1 times [2022-03-18 00:45:32,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:32,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2028795382] [2022-03-18 00:45:32,902 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:32,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1209153456, now seen corresponding path program 1 times [2022-03-18 00:45:32,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:32,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093825799] [2022-03-18 00:45:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:32,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:32,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:32,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093825799] [2022-03-18 00:45:32,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093825799] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:32,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:32,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:45:32,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:32,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2028795382] [2022-03-18 00:45:32,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2028795382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:32,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:32,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:45:32,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680716162] [2022-03-18 00:45:32,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:32,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:45:32,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:45:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:45:32,986 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-03-18 00:45:33,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:33,036 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-18 00:45:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:45:33,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2022-03-18 00:45:33,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:33,038 INFO L225 Difference]: With dead ends: 22 [2022-03-18 00:45:33,038 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 00:45:33,038 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-18 00:45:33,041 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:33,045 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 00:45:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 00:45:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-18 00:45:33,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-03-18 00:45:33,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:33,059 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-18 00:45:33,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-03-18 00:45:33,059 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-18 00:45:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 00:45:33,060 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:33,060 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:33,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 00:45:33,062 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:33,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 1 times [2022-03-18 00:45:33,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:33,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1175595519] [2022-03-18 00:45:33,418 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:33,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1150048112, now seen corresponding path program 1 times [2022-03-18 00:45:33,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:33,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274264947] [2022-03-18 00:45:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:33,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:33,430 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:33,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 2 times [2022-03-18 00:45:33,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:33,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149218267] [2022-03-18 00:45:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:33,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:33,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:33,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149218267] [2022-03-18 00:45:33,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149218267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:33,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940488982] [2022-03-18 00:45:33,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:33,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:33,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:33,482 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) [2022-03-18 00:45:33,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 00:45:33,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:33,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:33,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 00:45:33,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:33,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:33,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940488982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:33,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:33,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 00:45:33,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:33,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1175595519] [2022-03-18 00:45:33,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1175595519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:33,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:33,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:45:33,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402316759] [2022-03-18 00:45:33,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:33,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:45:33,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:33,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:45:33,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:45:33,591 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-18 00:45:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:33,633 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-03-18 00:45:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:45:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2022-03-18 00:45:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:33,634 INFO L225 Difference]: With dead ends: 26 [2022-03-18 00:45:33,634 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 00:45:33,635 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:45:33,635 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:33,635 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 00:45:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-18 00:45:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-18 00:45:33,639 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-03-18 00:45:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:33,639 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-18 00:45:33,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-18 00:45:33,639 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-18 00:45:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:45:33,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:33,639 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:33,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:33,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:33,856 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:33,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:33,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1870563496, now seen corresponding path program 3 times [2022-03-18 00:45:33,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:33,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [215338355] [2022-03-18 00:45:34,075 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1090942768, now seen corresponding path program 1 times [2022-03-18 00:45:34,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:34,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192020674] [2022-03-18 00:45:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:34,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:34,086 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:34,095 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1870563496, now seen corresponding path program 4 times [2022-03-18 00:45:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:34,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513591583] [2022-03-18 00:45:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:34,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:34,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 00:45:34,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:34,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513591583] [2022-03-18 00:45:34,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513591583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:34,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712468436] [2022-03-18 00:45:34,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:34,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:34,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:34,175 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) [2022-03-18 00:45:34,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 00:45:34,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:34,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:34,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:45:34,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:34,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:34,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712468436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:34,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:34,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-03-18 00:45:34,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [215338355] [2022-03-18 00:45:34,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [215338355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:34,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:34,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:45:34,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182363892] [2022-03-18 00:45:34,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:34,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:45:34,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:34,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:45:34,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:45:34,317 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:34,382 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-03-18 00:45:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:45:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 00:45:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:34,383 INFO L225 Difference]: With dead ends: 26 [2022-03-18 00:45:34,383 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 00:45:34,384 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:45:34,385 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:34,385 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 34 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 00:45:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-18 00:45:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-03-18 00:45:34,394 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2022-03-18 00:45:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:34,394 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-03-18 00:45:34,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:34,395 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-03-18 00:45:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 00:45:34,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:34,396 INFO L500 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:34,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 00:45:34,612 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,SelfDestructingSolverStorable6,SelfDestructingSolverStorable5 [2022-03-18 00:45:34,613 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:34,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1212152141, now seen corresponding path program 5 times [2022-03-18 00:45:34,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:34,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1765131115] [2022-03-18 00:45:34,811 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1031837424, now seen corresponding path program 1 times [2022-03-18 00:45:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:34,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304409036] [2022-03-18 00:45:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:34,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:34,818 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:34,823 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1212152141, now seen corresponding path program 6 times [2022-03-18 00:45:34,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:34,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186018027] [2022-03-18 00:45:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:34,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:34,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:34,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:34,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186018027] [2022-03-18 00:45:34,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186018027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:34,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776645520] [2022-03-18 00:45:34,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:45:34,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:34,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:34,884 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) [2022-03-18 00:45:34,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 00:45:34,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 00:45:34,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:34,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 00:45:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 00:45:34,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 00:45:34,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776645520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:34,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:34,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-18 00:45:34,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:34,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1765131115] [2022-03-18 00:45:34,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1765131115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:34,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:34,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:45:34,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468954374] [2022-03-18 00:45:34,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:34,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:45:34,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:34,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:45:34,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:45:34,997 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:35,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:35,033 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-03-18 00:45:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:45:35,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-18 00:45:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:35,034 INFO L225 Difference]: With dead ends: 32 [2022-03-18 00:45:35,034 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 00:45:35,035 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:45:35,037 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:35,037 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 00:45:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-18 00:45:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-03-18 00:45:35,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2022-03-18 00:45:35,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:35,044 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-03-18 00:45:35,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-03-18 00:45:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 00:45:35,044 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:35,044 INFO L500 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:35,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:35,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:35,257 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:35,258 INFO L85 PathProgramCache]: Analyzing trace with hash 553994512, now seen corresponding path program 7 times [2022-03-18 00:45:35,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:35,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1502319508] [2022-03-18 00:45:35,418 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:35,419 INFO L85 PathProgramCache]: Analyzing trace with hash -972732080, now seen corresponding path program 1 times [2022-03-18 00:45:35,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:35,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999089841] [2022-03-18 00:45:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:35,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:35,424 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:35,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash 553994512, now seen corresponding path program 8 times [2022-03-18 00:45:35,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:35,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059208708] [2022-03-18 00:45:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:35,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:35,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059208708] [2022-03-18 00:45:35,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059208708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176828305] [2022-03-18 00:45:35,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:35,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:35,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:35,495 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) [2022-03-18 00:45:35,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 00:45:35,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:35,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:35,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 00:45:35,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:35,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:35,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176828305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:35,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:35,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-18 00:45:35,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:35,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1502319508] [2022-03-18 00:45:35,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1502319508] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:35,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:35,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:45:35,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953715567] [2022-03-18 00:45:35,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:35,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:45:35,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:35,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:45:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:45:35,605 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2022-03-18 00:45:35,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:35,649 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-18 00:45:35,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:45:35,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 21 [2022-03-18 00:45:35,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:35,650 INFO L225 Difference]: With dead ends: 34 [2022-03-18 00:45:35,650 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 00:45:35,651 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:45:35,652 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:35,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 00:45:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-18 00:45:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-18 00:45:35,659 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-03-18 00:45:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:35,660 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-18 00:45:35,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2022-03-18 00:45:35,660 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-18 00:45:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:45:35,661 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:35,661 INFO L500 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:35,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 00:45:35,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:35,901 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1308846125, now seen corresponding path program 9 times [2022-03-18 00:45:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:35,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381403193] [2022-03-18 00:45:36,098 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:36,098 INFO L85 PathProgramCache]: Analyzing trace with hash -913626736, now seen corresponding path program 1 times [2022-03-18 00:45:36,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:36,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125505509] [2022-03-18 00:45:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:36,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:36,109 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:36,113 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:36,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1308846125, now seen corresponding path program 10 times [2022-03-18 00:45:36,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:36,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414014009] [2022-03-18 00:45:36,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:36,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:36,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:36,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414014009] [2022-03-18 00:45:36,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414014009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546614875] [2022-03-18 00:45:36,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:36,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:36,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:36,162 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) [2022-03-18 00:45:36,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 00:45:36,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:36,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:36,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:45:36,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:36,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:36,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546614875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:36,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:36,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-18 00:45:36,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:36,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381403193] [2022-03-18 00:45:36,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381403193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:36,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:36,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:45:36,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958883485] [2022-03-18 00:45:36,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:36,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:45:36,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:45:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:45:36,318 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-03-18 00:45:36,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:36,364 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-03-18 00:45:36,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:45:36,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 23 [2022-03-18 00:45:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:36,365 INFO L225 Difference]: With dead ends: 36 [2022-03-18 00:45:36,365 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 00:45:36,366 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:45:36,366 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:36,366 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 00:45:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 00:45:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-18 00:45:36,369 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-18 00:45:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:36,369 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-18 00:45:36,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-03-18 00:45:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-18 00:45:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 00:45:36,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:36,370 INFO L500 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:36,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-18 00:45:36,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11,SelfDestructingSolverStorable12 [2022-03-18 00:45:36,587 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:36,587 INFO L85 PathProgramCache]: Analyzing trace with hash 871773194, now seen corresponding path program 11 times [2022-03-18 00:45:36,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:36,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1311790029] [2022-03-18 00:45:36,795 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash -854521392, now seen corresponding path program 1 times [2022-03-18 00:45:36,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:36,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807870378] [2022-03-18 00:45:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:36,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:36,800 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:36,804 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash 871773194, now seen corresponding path program 12 times [2022-03-18 00:45:36,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:36,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069921481] [2022-03-18 00:45:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:36,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:36,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:36,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:36,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069921481] [2022-03-18 00:45:36,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069921481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:36,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081030550] [2022-03-18 00:45:36,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:45:36,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:36,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:36,881 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) [2022-03-18 00:45:36,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 00:45:36,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:45:36,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:36,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:45:36,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 00:45:37,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 00:45:37,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081030550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:37,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:37,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2022-03-18 00:45:37,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:37,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1311790029] [2022-03-18 00:45:37,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1311790029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:37,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:37,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:45:37,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488961448] [2022-03-18 00:45:37,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:37,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:45:37,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:37,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:45:37,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:45:37,073 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:37,134 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-03-18 00:45:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:45:37,134 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-18 00:45:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:37,135 INFO L225 Difference]: With dead ends: 38 [2022-03-18 00:45:37,135 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 00:45:37,135 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=224, Invalid=282, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:45:37,137 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:37,137 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 00:45:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-18 00:45:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-03-18 00:45:37,142 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-03-18 00:45:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:37,143 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-03-18 00:45:37,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-03-18 00:45:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 00:45:37,144 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:37,144 INFO L500 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:37,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 00:45:37,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 00:45:37,364 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1751481511, now seen corresponding path program 13 times [2022-03-18 00:45:37,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:37,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [249569891] [2022-03-18 00:45:37,513 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:37,514 INFO L85 PathProgramCache]: Analyzing trace with hash -795416048, now seen corresponding path program 1 times [2022-03-18 00:45:37,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:37,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038234915] [2022-03-18 00:45:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:37,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:37,526 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:37,538 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:37,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1751481511, now seen corresponding path program 14 times [2022-03-18 00:45:37,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:37,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687353850] [2022-03-18 00:45:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:37,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:37,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:37,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:37,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687353850] [2022-03-18 00:45:37,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687353850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:37,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889204309] [2022-03-18 00:45:37,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:37,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:37,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:37,604 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) [2022-03-18 00:45:37,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 00:45:37,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:37,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 00:45:37,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:37,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:37,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889204309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:37,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:37,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 00:45:37,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:37,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [249569891] [2022-03-18 00:45:37,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [249569891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:37,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:37,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:45:37,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133004986] [2022-03-18 00:45:37,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:37,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:45:37,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:37,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:45:37,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:45:37,780 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-03-18 00:45:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:37,847 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-03-18 00:45:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:45:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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 27 [2022-03-18 00:45:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:37,848 INFO L225 Difference]: With dead ends: 40 [2022-03-18 00:45:37,848 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 00:45:37,849 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:45:37,849 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:37,849 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 29 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 00:45:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-18 00:45:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-18 00:45:37,863 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2022-03-18 00:45:37,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:37,863 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-18 00:45:37,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-03-18 00:45:37,863 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-18 00:45:37,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 00:45:37,864 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:37,864 INFO L500 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:37,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:38,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:38,081 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:38,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1042616836, now seen corresponding path program 15 times [2022-03-18 00:45:38,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:38,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1742162244] [2022-03-18 00:45:38,283 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:38,283 INFO L85 PathProgramCache]: Analyzing trace with hash -736310704, now seen corresponding path program 1 times [2022-03-18 00:45:38,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:38,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109973683] [2022-03-18 00:45:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:38,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:38,287 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:38,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:38,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1042616836, now seen corresponding path program 16 times [2022-03-18 00:45:38,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:38,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321911984] [2022-03-18 00:45:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:38,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:38,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:38,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:38,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321911984] [2022-03-18 00:45:38,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321911984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:38,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93561154] [2022-03-18 00:45:38,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:38,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:38,351 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) [2022-03-18 00:45:38,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 00:45:38,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:38,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:38,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 00:45:38,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:38,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:38,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93561154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:38,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:38,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-18 00:45:38,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:38,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1742162244] [2022-03-18 00:45:38,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1742162244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:38,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:38,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:45:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859363515] [2022-03-18 00:45:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:38,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:45:38,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:38,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:45:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:45:38,544 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-03-18 00:45:38,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:38,619 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-03-18 00:45:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:45:38,619 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 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 29 [2022-03-18 00:45:38,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:38,620 INFO L225 Difference]: With dead ends: 42 [2022-03-18 00:45:38,620 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 00:45:38,620 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:45:38,621 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:38,621 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:38,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 00:45:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 00:45:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-18 00:45:38,624 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2022-03-18 00:45:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:38,624 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-18 00:45:38,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-03-18 00:45:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-18 00:45:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 00:45:38,625 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:38,625 INFO L500 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:38,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:38,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 00:45:38,842 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:38,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:38,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1571503071, now seen corresponding path program 17 times [2022-03-18 00:45:38,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:38,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1284597453] [2022-03-18 00:45:39,044 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:39,045 INFO L85 PathProgramCache]: Analyzing trace with hash -677205360, now seen corresponding path program 1 times [2022-03-18 00:45:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:39,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673812644] [2022-03-18 00:45:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:39,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:39,048 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:39,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:39,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1571503071, now seen corresponding path program 18 times [2022-03-18 00:45:39,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:39,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476734836] [2022-03-18 00:45:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:39,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:39,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:39,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:39,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476734836] [2022-03-18 00:45:39,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476734836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049840181] [2022-03-18 00:45:39,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:45:39,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:39,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:39,109 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) [2022-03-18 00:45:39,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 00:45:39,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:45:39,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:39,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:45:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 00:45:39,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 00:45:39,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049840181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:39,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:39,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 22 [2022-03-18 00:45:39,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:39,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1284597453] [2022-03-18 00:45:39,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1284597453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:39,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:39,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:45:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093907564] [2022-03-18 00:45:39,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:39,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:45:39,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:45:39,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:45:39,329 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:39,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:39,438 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-03-18 00:45:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:45:39,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-18 00:45:39,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:39,438 INFO L225 Difference]: With dead ends: 44 [2022-03-18 00:45:39,438 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 00:45:39,439 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:45:39,439 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:39,439 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 44 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 00:45:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 00:45:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-18 00:45:39,442 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2022-03-18 00:45:39,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:39,443 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-18 00:45:39,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-18 00:45:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 00:45:39,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:39,443 INFO L500 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:39,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:39,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:39,660 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:39,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1184865538, now seen corresponding path program 19 times [2022-03-18 00:45:39,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:39,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1376665184] [2022-03-18 00:45:39,828 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:39,828 INFO L85 PathProgramCache]: Analyzing trace with hash -618100016, now seen corresponding path program 1 times [2022-03-18 00:45:39,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:39,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511380162] [2022-03-18 00:45:39,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:39,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:39,832 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:39,835 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:39,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1184865538, now seen corresponding path program 20 times [2022-03-18 00:45:39,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:39,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514824799] [2022-03-18 00:45:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:39,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:39,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:39,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:39,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514824799] [2022-03-18 00:45:39,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514824799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:39,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193642293] [2022-03-18 00:45:39,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:39,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:39,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:39,898 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) [2022-03-18 00:45:39,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 00:45:39,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:39,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:39,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 00:45:39,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:39,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:40,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193642293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:40,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:40,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-18 00:45:40,145 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:40,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1376665184] [2022-03-18 00:45:40,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1376665184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:40,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:40,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:45:40,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302293773] [2022-03-18 00:45:40,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:40,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:45:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:45:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:45:40,146 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 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) [2022-03-18 00:45:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:40,242 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-03-18 00:45:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:45:40,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 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 33 [2022-03-18 00:45:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:40,243 INFO L225 Difference]: With dead ends: 46 [2022-03-18 00:45:40,243 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 00:45:40,244 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:45:40,244 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:40,244 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 00:45:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-18 00:45:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-03-18 00:45:40,247 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 33 [2022-03-18 00:45:40,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:40,247 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-03-18 00:45:40,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 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) [2022-03-18 00:45:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-03-18 00:45:40,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 00:45:40,248 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:40,248 INFO L500 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:40,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:40,448 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,SelfDestructingSolverStorable21,SelfDestructingSolverStorable22 [2022-03-18 00:45:40,448 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:40,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1006616219, now seen corresponding path program 21 times [2022-03-18 00:45:40,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:40,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1767215421] [2022-03-18 00:45:40,639 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash -558994672, now seen corresponding path program 1 times [2022-03-18 00:45:40,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:40,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028022104] [2022-03-18 00:45:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:40,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:40,643 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:40,645 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:40,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1006616219, now seen corresponding path program 22 times [2022-03-18 00:45:40,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:40,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143153999] [2022-03-18 00:45:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:40,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:40,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:40,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:40,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143153999] [2022-03-18 00:45:40,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143153999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:40,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367021380] [2022-03-18 00:45:40,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:40,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:40,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:40,723 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) [2022-03-18 00:45:40,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 00:45:40,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:40,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:40,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 00:45:40,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:40,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:40,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367021380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:40,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:40,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-18 00:45:40,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:40,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1767215421] [2022-03-18 00:45:40,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1767215421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:40,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:40,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:45:40,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10514093] [2022-03-18 00:45:40,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:40,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:45:40,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:40,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:45:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:45:40,981 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:41,088 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-18 00:45:41,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:45:41,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-18 00:45:41,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:41,089 INFO L225 Difference]: With dead ends: 48 [2022-03-18 00:45:41,089 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 00:45:41,090 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:45:41,090 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:41,090 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 00:45:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-18 00:45:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-03-18 00:45:41,093 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 35 [2022-03-18 00:45:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:41,093 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-03-18 00:45:41,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:41,094 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-03-18 00:45:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 00:45:41,094 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:41,094 INFO L500 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:41,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:41,303 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,SelfDestructingSolverStorable23,SelfDestructingSolverStorable24 [2022-03-18 00:45:41,303 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:41,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:41,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1808357640, now seen corresponding path program 23 times [2022-03-18 00:45:41,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:41,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1334526793] [2022-03-18 00:45:41,453 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:41,453 INFO L85 PathProgramCache]: Analyzing trace with hash -499889328, now seen corresponding path program 1 times [2022-03-18 00:45:41,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:41,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672004172] [2022-03-18 00:45:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:41,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:41,457 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:41,459 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:41,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1808357640, now seen corresponding path program 24 times [2022-03-18 00:45:41,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:41,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637174008] [2022-03-18 00:45:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:41,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:41,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:41,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:41,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637174008] [2022-03-18 00:45:41,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637174008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:41,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816213897] [2022-03-18 00:45:41,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:45:41,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:41,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:41,530 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) [2022-03-18 00:45:41,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 00:45:41,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:45:41,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:41,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:45:41,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-18 00:45:41,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-18 00:45:41,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816213897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:41,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:41,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 25 [2022-03-18 00:45:41,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:41,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1334526793] [2022-03-18 00:45:41,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1334526793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:41,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:41,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:45:41,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484173420] [2022-03-18 00:45:41,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:41,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:45:41,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:45:41,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:45:41,791 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:41,929 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-03-18 00:45:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:45:41,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-18 00:45:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:41,930 INFO L225 Difference]: With dead ends: 50 [2022-03-18 00:45:41,930 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 00:45:41,930 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:45:41,931 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:41,931 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 00:45:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-18 00:45:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-03-18 00:45:41,943 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 37 [2022-03-18 00:45:41,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:41,943 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-03-18 00:45:41,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:41,943 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-03-18 00:45:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 00:45:41,944 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:41,944 INFO L500 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:41,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:42,144 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,SelfDestructingSolverStorable25,SelfDestructingSolverStorable26 [2022-03-18 00:45:42,144 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:42,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:42,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1168839659, now seen corresponding path program 25 times [2022-03-18 00:45:42,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:42,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1306335030] [2022-03-18 00:45:42,343 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:42,343 INFO L85 PathProgramCache]: Analyzing trace with hash -440783984, now seen corresponding path program 1 times [2022-03-18 00:45:42,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:42,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372796242] [2022-03-18 00:45:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:42,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:42,346 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:42,349 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:42,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1168839659, now seen corresponding path program 26 times [2022-03-18 00:45:42,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:42,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470539020] [2022-03-18 00:45:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:42,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:42,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:42,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:42,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470539020] [2022-03-18 00:45:42,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470539020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:42,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147371017] [2022-03-18 00:45:42,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:42,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:42,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:42,450 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) [2022-03-18 00:45:42,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 00:45:42,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:42,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 00:45:42,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:42,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:42,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147371017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:42,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:42,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-18 00:45:42,775 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:42,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1306335030] [2022-03-18 00:45:42,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1306335030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:42,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:42,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:45:42,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389127450] [2022-03-18 00:45:42,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:42,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:45:42,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:45:42,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-03-18 00:45:42,776 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 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) [2022-03-18 00:45:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:42,904 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-03-18 00:45:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:45:42,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 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 39 [2022-03-18 00:45:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:42,904 INFO L225 Difference]: With dead ends: 52 [2022-03-18 00:45:42,904 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 00:45:42,905 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 00:45:42,905 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:42,906 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 00:45:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-18 00:45:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-03-18 00:45:42,909 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 39 [2022-03-18 00:45:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:42,909 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-03-18 00:45:42,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 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) [2022-03-18 00:45:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-03-18 00:45:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 00:45:42,909 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:42,909 INFO L500 BasicCegarLoop]: trace histogram [15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:42,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:43,119 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,SelfDestructingSolverStorable27,SelfDestructingSolverStorable28 [2022-03-18 00:45:43,119 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:43,120 INFO L85 PathProgramCache]: Analyzing trace with hash -772383246, now seen corresponding path program 27 times [2022-03-18 00:45:43,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:43,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098330728] [2022-03-18 00:45:43,297 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:43,297 INFO L85 PathProgramCache]: Analyzing trace with hash -381678640, now seen corresponding path program 1 times [2022-03-18 00:45:43,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:43,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659342350] [2022-03-18 00:45:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:43,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:43,302 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:43,304 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:43,305 INFO L85 PathProgramCache]: Analyzing trace with hash -772383246, now seen corresponding path program 28 times [2022-03-18 00:45:43,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:43,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614013033] [2022-03-18 00:45:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:43,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:43,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:43,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:43,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614013033] [2022-03-18 00:45:43,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614013033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:43,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863927594] [2022-03-18 00:45:43,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:43,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:43,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:43,421 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) [2022-03-18 00:45:43,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 00:45:43,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:43,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:43,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 00:45:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:43,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:43,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863927594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:43,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:43,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-18 00:45:43,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:43,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098330728] [2022-03-18 00:45:43,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098330728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:43,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:43,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 00:45:43,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453627564] [2022-03-18 00:45:43,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:43,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 00:45:43,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:43,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 00:45:43,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:45:43,772 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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) [2022-03-18 00:45:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:43,911 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-18 00:45:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:45:43,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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 41 [2022-03-18 00:45:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:43,911 INFO L225 Difference]: With dead ends: 54 [2022-03-18 00:45:43,912 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 00:45:43,912 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:45:43,912 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:43,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 00:45:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-18 00:45:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:43,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-03-18 00:45:43,915 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 41 [2022-03-18 00:45:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:43,916 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-03-18 00:45:43,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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) [2022-03-18 00:45:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-03-18 00:45:43,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 00:45:43,916 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:43,916 INFO L500 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:43,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:44,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:44,123 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2029859697, now seen corresponding path program 29 times [2022-03-18 00:45:44,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:44,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [312719937] [2022-03-18 00:45:44,284 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:44,284 INFO L85 PathProgramCache]: Analyzing trace with hash -322573296, now seen corresponding path program 1 times [2022-03-18 00:45:44,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:44,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48951747] [2022-03-18 00:45:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:44,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:44,287 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:44,289 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:44,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2029859697, now seen corresponding path program 30 times [2022-03-18 00:45:44,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:44,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186666424] [2022-03-18 00:45:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:44,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:44,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:44,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:44,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186666424] [2022-03-18 00:45:44,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186666424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:44,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4708956] [2022-03-18 00:45:44,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:45:44,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:44,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:44,413 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) [2022-03-18 00:45:44,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 00:45:44,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:45:44,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:44,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:45:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 00:45:44,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 00:45:44,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4708956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:44,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:44,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 28 [2022-03-18 00:45:44,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:44,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [312719937] [2022-03-18 00:45:44,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [312719937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:44,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:44,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:45:44,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783872318] [2022-03-18 00:45:44,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:44,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:45:44,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:45:44,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:45:44,689 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 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) [2022-03-18 00:45:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:44,884 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-03-18 00:45:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 00:45:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 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 43 [2022-03-18 00:45:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:44,885 INFO L225 Difference]: With dead ends: 56 [2022-03-18 00:45:44,885 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 00:45:44,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=1358, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 00:45:44,886 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:44,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 49 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:44,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 00:45:44,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-18 00:45:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-03-18 00:45:44,889 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2022-03-18 00:45:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:44,889 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-03-18 00:45:44,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 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) [2022-03-18 00:45:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-03-18 00:45:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 00:45:44,890 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:44,890 INFO L500 BasicCegarLoop]: trace histogram [17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:44,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:45,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:45,099 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:45,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:45,099 INFO L85 PathProgramCache]: Analyzing trace with hash 716048364, now seen corresponding path program 31 times [2022-03-18 00:45:45,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:45,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [420791124] [2022-03-18 00:45:45,285 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:45,285 INFO L85 PathProgramCache]: Analyzing trace with hash -263467952, now seen corresponding path program 1 times [2022-03-18 00:45:45,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:45,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003871248] [2022-03-18 00:45:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:45,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:45,288 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:45,290 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash 716048364, now seen corresponding path program 32 times [2022-03-18 00:45:45,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:45,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792104784] [2022-03-18 00:45:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:45,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:45,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:45,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:45,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792104784] [2022-03-18 00:45:45,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792104784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:45,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352622411] [2022-03-18 00:45:45,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:45,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:45,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:45,428 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) [2022-03-18 00:45:45,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 00:45:45,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:45,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 00:45:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:45,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:45,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352622411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:45,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:45,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 00:45:45,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:45,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [420791124] [2022-03-18 00:45:45,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [420791124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:45,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:45,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 00:45:45,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748243774] [2022-03-18 00:45:45,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:45,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 00:45:45,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 00:45:45,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 00:45:45,844 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 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) [2022-03-18 00:45:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:46,016 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-03-18 00:45:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:45:46,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 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 45 [2022-03-18 00:45:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:46,016 INFO L225 Difference]: With dead ends: 58 [2022-03-18 00:45:46,016 INFO L226 Difference]: Without dead ends: 49 [2022-03-18 00:45:46,017 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:45:46,017 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:46,018 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 24 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-18 00:45:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-18 00:45:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-03-18 00:45:46,020 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 45 [2022-03-18 00:45:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:46,021 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-03-18 00:45:46,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 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) [2022-03-18 00:45:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-03-18 00:45:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 00:45:46,021 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:46,021 INFO L500 BasicCegarLoop]: trace histogram [18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:46,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:46,230 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,SelfDestructingSolverStorable33,SelfDestructingSolverStorable34 [2022-03-18 00:45:46,230 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:46,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1871192055, now seen corresponding path program 33 times [2022-03-18 00:45:46,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:46,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1764562320] [2022-03-18 00:45:46,378 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:46,378 INFO L85 PathProgramCache]: Analyzing trace with hash -204362608, now seen corresponding path program 1 times [2022-03-18 00:45:46,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:46,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311396632] [2022-03-18 00:45:46,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:46,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:46,382 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:46,387 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1871192055, now seen corresponding path program 34 times [2022-03-18 00:45:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:46,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468130522] [2022-03-18 00:45:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:46,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:46,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:46,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:46,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468130522] [2022-03-18 00:45:46,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468130522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:46,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014819338] [2022-03-18 00:45:46,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:46,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:46,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:46,526 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) [2022-03-18 00:45:46,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 00:45:46,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:46,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:46,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 00:45:46,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:46,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:46,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014819338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:46,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:46,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-18 00:45:46,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:46,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1764562320] [2022-03-18 00:45:46,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1764562320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:46,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:46,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:45:46,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784709493] [2022-03-18 00:45:46,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:46,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:45:46,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:46,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:45:46,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 00:45:46,986 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 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) [2022-03-18 00:45:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:47,180 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-03-18 00:45:47,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 00:45:47,180 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 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 47 [2022-03-18 00:45:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:47,181 INFO L225 Difference]: With dead ends: 60 [2022-03-18 00:45:47,181 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 00:45:47,182 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 00:45:47,182 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:47,182 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 44 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:47,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 00:45:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-18 00:45:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-03-18 00:45:47,185 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 47 [2022-03-18 00:45:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:47,185 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-03-18 00:45:47,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 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) [2022-03-18 00:45:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-03-18 00:45:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 00:45:47,186 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:47,186 INFO L500 BasicCegarLoop]: trace histogram [19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:47,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:47,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-18 00:45:47,387 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:47,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:47,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1423170330, now seen corresponding path program 35 times [2022-03-18 00:45:47,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:47,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1290694065] [2022-03-18 00:45:47,553 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:47,553 INFO L85 PathProgramCache]: Analyzing trace with hash -145257264, now seen corresponding path program 1 times [2022-03-18 00:45:47,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:47,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620072933] [2022-03-18 00:45:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:47,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:47,556 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:47,558 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1423170330, now seen corresponding path program 36 times [2022-03-18 00:45:47,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:47,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696694322] [2022-03-18 00:45:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:47,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:47,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:47,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:47,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696694322] [2022-03-18 00:45:47,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696694322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:47,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992899175] [2022-03-18 00:45:47,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:45:47,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:47,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:47,713 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) [2022-03-18 00:45:47,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 00:45:47,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:45:47,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:47,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:45:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-18 00:45:47,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-18 00:45:47,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992899175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:47,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:47,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 8] total 31 [2022-03-18 00:45:47,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:47,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1290694065] [2022-03-18 00:45:47,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1290694065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:47,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:47,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 00:45:47,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416900876] [2022-03-18 00:45:47,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:47,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 00:45:47,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 00:45:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:45:47,975 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 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) [2022-03-18 00:45:48,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:48,186 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-03-18 00:45:48,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:45:48,187 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 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 49 [2022-03-18 00:45:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:48,187 INFO L225 Difference]: With dead ends: 62 [2022-03-18 00:45:48,187 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 00:45:48,188 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 00:45:48,188 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:48,188 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 00:45:48,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-18 00:45:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-03-18 00:45:48,191 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 49 [2022-03-18 00:45:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:48,191 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-03-18 00:45:48,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 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) [2022-03-18 00:45:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-03-18 00:45:48,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 00:45:48,192 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:48,192 INFO L500 BasicCegarLoop]: trace histogram [20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:48,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:48,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37,SelfDestructingSolverStorable38 [2022-03-18 00:45:48,405 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:48,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:48,406 INFO L85 PathProgramCache]: Analyzing trace with hash -371022205, now seen corresponding path program 37 times [2022-03-18 00:45:48,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:48,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [163596646] [2022-03-18 00:45:48,537 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:48,537 INFO L85 PathProgramCache]: Analyzing trace with hash -86151920, now seen corresponding path program 1 times [2022-03-18 00:45:48,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:48,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966177351] [2022-03-18 00:45:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:48,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:48,553 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:48,556 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:48,556 INFO L85 PathProgramCache]: Analyzing trace with hash -371022205, now seen corresponding path program 38 times [2022-03-18 00:45:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:48,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726433176] [2022-03-18 00:45:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:48,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:48,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:48,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:48,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726433176] [2022-03-18 00:45:48,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726433176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:48,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307050032] [2022-03-18 00:45:48,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:48,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:48,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:48,730 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) [2022-03-18 00:45:48,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 00:45:48,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:48,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:48,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 00:45:48,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:48,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:49,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307050032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:49,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:49,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-18 00:45:49,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:49,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [163596646] [2022-03-18 00:45:49,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [163596646] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:49,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:49,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:45:49,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919752268] [2022-03-18 00:45:49,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:49,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:45:49,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:49,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:45:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 00:45:49,305 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 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) [2022-03-18 00:45:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:49,521 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-03-18 00:45:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 00:45:49,522 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 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 51 [2022-03-18 00:45:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:49,522 INFO L225 Difference]: With dead ends: 64 [2022-03-18 00:45:49,522 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 00:45:49,523 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 00:45:49,523 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:49,524 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 24 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 00:45:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-18 00:45:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-03-18 00:45:49,526 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 51 [2022-03-18 00:45:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:49,526 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-03-18 00:45:49,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 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) [2022-03-18 00:45:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-03-18 00:45:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 00:45:49,527 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:49,527 INFO L500 BasicCegarLoop]: trace histogram [21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:49,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:49,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-18 00:45:49,740 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:49,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1426011360, now seen corresponding path program 39 times [2022-03-18 00:45:49,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:49,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1515980439] [2022-03-18 00:45:49,882 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash -27046576, now seen corresponding path program 1 times [2022-03-18 00:45:49,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:49,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503801581] [2022-03-18 00:45:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:49,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:49,885 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:49,902 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:49,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1426011360, now seen corresponding path program 40 times [2022-03-18 00:45:49,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:49,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519068509] [2022-03-18 00:45:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:49,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:50,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:50,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:50,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519068509] [2022-03-18 00:45:50,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519068509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:50,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944055829] [2022-03-18 00:45:50,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:50,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:50,114 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) [2022-03-18 00:45:50,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 00:45:50,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:50,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:50,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 00:45:50,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:50,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:50,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944055829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:50,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:50,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-18 00:45:50,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:50,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1515980439] [2022-03-18 00:45:50,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1515980439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:50,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:50,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 00:45:50,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744207660] [2022-03-18 00:45:50,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:50,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 00:45:50,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:50,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 00:45:50,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:45:50,630 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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) [2022-03-18 00:45:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:50,807 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-03-18 00:45:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:45:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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 53 [2022-03-18 00:45:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:50,808 INFO L225 Difference]: With dead ends: 66 [2022-03-18 00:45:50,808 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 00:45:50,809 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:45:50,809 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:50,809 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 00:45:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-18 00:45:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-03-18 00:45:50,812 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 53 [2022-03-18 00:45:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:50,812 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-03-18 00:45:50,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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) [2022-03-18 00:45:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-03-18 00:45:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 00:45:50,813 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:50,813 INFO L500 BasicCegarLoop]: trace histogram [22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:50,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:51,029 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,SelfDestructingSolverStorable41,SelfDestructingSolverStorable42 [2022-03-18 00:45:51,029 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:51,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1798414333, now seen corresponding path program 41 times [2022-03-18 00:45:51,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:51,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [552180365] [2022-03-18 00:45:51,196 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:51,196 INFO L85 PathProgramCache]: Analyzing trace with hash 32058768, now seen corresponding path program 1 times [2022-03-18 00:45:51,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:51,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384304347] [2022-03-18 00:45:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:51,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:51,229 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:51,234 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:51,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1798414333, now seen corresponding path program 42 times [2022-03-18 00:45:51,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:51,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023294476] [2022-03-18 00:45:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:51,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:51,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:51,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:51,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023294476] [2022-03-18 00:45:51,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023294476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:51,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685465655] [2022-03-18 00:45:51,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:45:51,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:51,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:51,422 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) [2022-03-18 00:45:51,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 00:45:51,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:45:51,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:45:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 00:45:51,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 00:45:51,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685465655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:51,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:51,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 8] total 34 [2022-03-18 00:45:51,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:51,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [552180365] [2022-03-18 00:45:51,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [552180365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:51,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:51,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 00:45:51,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356962413] [2022-03-18 00:45:51,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:51,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 00:45:51,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:51,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 00:45:51,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=827, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:45:51,708 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 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) [2022-03-18 00:45:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:51,998 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-03-18 00:45:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 00:45:51,998 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 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 55 [2022-03-18 00:45:51,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:51,998 INFO L225 Difference]: With dead ends: 68 [2022-03-18 00:45:51,998 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 00:45:51,999 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=799, Invalid=2171, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 00:45:51,999 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:52,000 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 29 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 00:45:52,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-18 00:45:52,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-03-18 00:45:52,002 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 55 [2022-03-18 00:45:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:52,002 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-03-18 00:45:52,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 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) [2022-03-18 00:45:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-03-18 00:45:52,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 00:45:52,003 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:52,003 INFO L500 BasicCegarLoop]: trace histogram [23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:52,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:52,203 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,SelfDestructingSolverStorable43,SelfDestructingSolverStorable44 [2022-03-18 00:45:52,203 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:52,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1099581478, now seen corresponding path program 43 times [2022-03-18 00:45:52,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:52,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1829959248] [2022-03-18 00:45:52,407 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash 91164112, now seen corresponding path program 1 times [2022-03-18 00:45:52,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:52,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340317529] [2022-03-18 00:45:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:52,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:52,410 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:52,416 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:52,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1099581478, now seen corresponding path program 44 times [2022-03-18 00:45:52,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:52,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789207454] [2022-03-18 00:45:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:52,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:52,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:52,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789207454] [2022-03-18 00:45:52,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789207454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378340249] [2022-03-18 00:45:52,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:52,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:52,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:52,643 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) [2022-03-18 00:45:52,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 00:45:52,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:52,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:52,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 00:45:52,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:52,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:53,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378340249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:53,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:53,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-18 00:45:53,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:53,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1829959248] [2022-03-18 00:45:53,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1829959248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:53,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:53,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 00:45:53,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928102534] [2022-03-18 00:45:53,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:53,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 00:45:53,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:53,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 00:45:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 00:45:53,291 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 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) [2022-03-18 00:45:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:53,569 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-03-18 00:45:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 00:45:53,569 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 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 57 [2022-03-18 00:45:53,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:53,570 INFO L225 Difference]: With dead ends: 70 [2022-03-18 00:45:53,570 INFO L226 Difference]: Without dead ends: 61 [2022-03-18 00:45:53,571 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 00:45:53,571 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:53,571 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 29 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:53,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-18 00:45:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-18 00:45:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-03-18 00:45:53,574 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 57 [2022-03-18 00:45:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:53,574 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-03-18 00:45:53,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 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) [2022-03-18 00:45:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-03-18 00:45:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 00:45:53,574 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:53,575 INFO L500 BasicCegarLoop]: trace histogram [24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:53,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:53,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,SelfDestructingSolverStorable46,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:53,787 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1360219255, now seen corresponding path program 45 times [2022-03-18 00:45:53,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:53,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1062853703] [2022-03-18 00:45:53,908 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:53,908 INFO L85 PathProgramCache]: Analyzing trace with hash 150269456, now seen corresponding path program 1 times [2022-03-18 00:45:53,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:53,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319736426] [2022-03-18 00:45:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:53,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:53,911 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:53,913 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1360219255, now seen corresponding path program 46 times [2022-03-18 00:45:53,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:53,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464722850] [2022-03-18 00:45:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:53,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:54,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:54,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464722850] [2022-03-18 00:45:54,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464722850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569772947] [2022-03-18 00:45:54,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:54,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:54,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:54,141 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) [2022-03-18 00:45:54,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 00:45:54,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:54,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:54,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 00:45:54,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:54,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:54,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569772947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:54,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:54,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-18 00:45:54,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:54,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1062853703] [2022-03-18 00:45:54,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1062853703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:54,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:54,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 00:45:54,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700804127] [2022-03-18 00:45:54,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:54,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 00:45:54,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:54,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 00:45:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:45:54,855 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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) [2022-03-18 00:45:55,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:55,048 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2022-03-18 00:45:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 00:45:55,048 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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 59 [2022-03-18 00:45:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:55,049 INFO L225 Difference]: With dead ends: 72 [2022-03-18 00:45:55,049 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 00:45:55,050 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 00:45:55,050 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:55,051 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:55,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 00:45:55,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-18 00:45:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-03-18 00:45:55,054 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 59 [2022-03-18 00:45:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:55,054 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-03-18 00:45:55,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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) [2022-03-18 00:45:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-03-18 00:45:55,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 00:45:55,054 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:55,054 INFO L500 BasicCegarLoop]: trace histogram [25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:55,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:55,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,SelfDestructingSolverStorable48,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:55,271 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:55,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1298256428, now seen corresponding path program 47 times [2022-03-18 00:45:55,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:55,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2006415168] [2022-03-18 00:45:55,431 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash 209374800, now seen corresponding path program 1 times [2022-03-18 00:45:55,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:55,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875628682] [2022-03-18 00:45:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:55,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:55,434 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:55,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1298256428, now seen corresponding path program 48 times [2022-03-18 00:45:55,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:55,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721017574] [2022-03-18 00:45:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:55,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:55,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:55,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:55,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721017574] [2022-03-18 00:45:55,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721017574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:55,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838599138] [2022-03-18 00:45:55,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:45:55,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:55,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:55,673 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) [2022-03-18 00:45:55,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 00:45:55,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:45:55,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:55,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:45:55,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-18 00:45:55,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-18 00:45:56,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838599138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:56,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:56,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 8, 8] total 37 [2022-03-18 00:45:56,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:56,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2006415168] [2022-03-18 00:45:56,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2006415168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:56,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:56,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 00:45:56,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085125597] [2022-03-18 00:45:56,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:56,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 00:45:56,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:56,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 00:45:56,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=965, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:45:56,019 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 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) [2022-03-18 00:45:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:56,255 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-03-18 00:45:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 00:45:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 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 61 [2022-03-18 00:45:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:56,256 INFO L225 Difference]: With dead ends: 74 [2022-03-18 00:45:56,256 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 00:45:56,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1015, Invalid=2645, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 00:45:56,257 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:56,258 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:56,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 00:45:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-18 00:45:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-03-18 00:45:56,262 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 61 [2022-03-18 00:45:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:56,262 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-03-18 00:45:56,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 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) [2022-03-18 00:45:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-03-18 00:45:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 00:45:56,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:56,263 INFO L500 BasicCegarLoop]: trace histogram [26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:56,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:56,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-18 00:45:56,473 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash -587846671, now seen corresponding path program 49 times [2022-03-18 00:45:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:56,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1592392758] [2022-03-18 00:45:56,589 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:56,590 INFO L85 PathProgramCache]: Analyzing trace with hash 268480144, now seen corresponding path program 1 times [2022-03-18 00:45:56,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:56,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777410707] [2022-03-18 00:45:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:56,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:56,594 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:56,596 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash -587846671, now seen corresponding path program 50 times [2022-03-18 00:45:56,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:56,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722576281] [2022-03-18 00:45:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:56,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:56,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:56,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722576281] [2022-03-18 00:45:56,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722576281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43599016] [2022-03-18 00:45:56,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:56,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:56,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:56,864 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:45:56,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 00:45:56,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:56,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:56,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 00:45:56,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:57,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:57,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43599016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:57,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:57,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-18 00:45:57,699 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:57,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1592392758] [2022-03-18 00:45:57,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1592392758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:57,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:57,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 00:45:57,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632034834] [2022-03-18 00:45:57,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:57,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 00:45:57,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:57,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 00:45:57,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:45:57,700 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 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) [2022-03-18 00:45:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:58,038 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-03-18 00:45:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 00:45:58,039 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 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 63 [2022-03-18 00:45:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:58,039 INFO L225 Difference]: With dead ends: 76 [2022-03-18 00:45:58,039 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 00:45:58,040 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 00:45:58,040 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:58,040 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 44 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:45:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 00:45:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-18 00:45:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-03-18 00:45:58,043 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 63 [2022-03-18 00:45:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:58,043 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-03-18 00:45:58,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 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) [2022-03-18 00:45:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-03-18 00:45:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 00:45:58,044 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:58,044 INFO L500 BasicCegarLoop]: trace histogram [27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:58,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:58,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51,SelfDestructingSolverStorable52 [2022-03-18 00:45:58,251 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash -783870258, now seen corresponding path program 51 times [2022-03-18 00:45:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:58,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [312792480] [2022-03-18 00:45:58,387 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:45:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash 327585488, now seen corresponding path program 1 times [2022-03-18 00:45:58,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:58,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292191400] [2022-03-18 00:45:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:58,390 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:45:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:45:58,392 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:45:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash -783870258, now seen corresponding path program 52 times [2022-03-18 00:45:58,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:58,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278861860] [2022-03-18 00:45:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:58,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:58,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:58,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:58,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278861860] [2022-03-18 00:45:58,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278861860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:58,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315840280] [2022-03-18 00:45:58,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:58,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:58,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:58,672 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:45:58,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 00:45:58,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:58,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:58,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 00:45:58,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:58,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:45:59,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315840280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:59,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:59,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-18 00:45:59,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:59,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [312792480] [2022-03-18 00:45:59,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [312792480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:59,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:59,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 00:45:59,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434952073] [2022-03-18 00:45:59,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:59,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 00:45:59,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:59,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 00:45:59,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 00:45:59,530 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 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) [2022-03-18 00:45:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:59,874 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-03-18 00:45:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 00:45:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 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 65 [2022-03-18 00:45:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:59,875 INFO L225 Difference]: With dead ends: 78 [2022-03-18 00:45:59,875 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 00:45:59,876 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 00:45:59,876 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:59,876 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:45:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 00:45:59,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-18 00:45:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-03-18 00:45:59,879 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 65 [2022-03-18 00:45:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:59,879 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-03-18 00:45:59,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 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) [2022-03-18 00:45:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-03-18 00:45:59,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 00:45:59,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:59,880 INFO L500 BasicCegarLoop]: trace histogram [28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:59,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:00,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53,SelfDestructingSolverStorable54 [2022-03-18 00:46:00,087 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:00,088 INFO L85 PathProgramCache]: Analyzing trace with hash -183976341, now seen corresponding path program 53 times [2022-03-18 00:46:00,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:00,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1896362860] [2022-03-18 00:46:00,246 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash 386690832, now seen corresponding path program 1 times [2022-03-18 00:46:00,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:00,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072215530] [2022-03-18 00:46:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:00,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:00,249 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:00,252 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash -183976341, now seen corresponding path program 54 times [2022-03-18 00:46:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:00,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543881056] [2022-03-18 00:46:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:00,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:00,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:00,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543881056] [2022-03-18 00:46:00,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543881056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:00,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758759160] [2022-03-18 00:46:00,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:46:00,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:00,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:00,543 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:00,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 00:46:00,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:46:00,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:00,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:46:00,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-18 00:46:00,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-18 00:46:00,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758759160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:00,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:00,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 8, 8] total 40 [2022-03-18 00:46:00,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:00,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1896362860] [2022-03-18 00:46:00,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1896362860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:00,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:00,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 00:46:00,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358719882] [2022-03-18 00:46:00,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:00,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 00:46:00,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:00,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 00:46:00,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:46:00,942 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 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) [2022-03-18 00:46:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:01,326 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-03-18 00:46:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 00:46:01,326 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 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 67 [2022-03-18 00:46:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:01,326 INFO L225 Difference]: With dead ends: 80 [2022-03-18 00:46:01,327 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 00:46:01,327 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:46:01,328 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:01,328 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:01,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 00:46:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-18 00:46:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-03-18 00:46:01,331 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 67 [2022-03-18 00:46:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:01,331 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-03-18 00:46:01,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 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) [2022-03-18 00:46:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-03-18 00:46:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 00:46:01,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:01,332 INFO L500 BasicCegarLoop]: trace histogram [29, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:01,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:01,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-18 00:46:01,548 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:01,548 INFO L85 PathProgramCache]: Analyzing trace with hash 788460232, now seen corresponding path program 55 times [2022-03-18 00:46:01,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:01,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [522229240] [2022-03-18 00:46:01,748 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:01,749 INFO L85 PathProgramCache]: Analyzing trace with hash 445796176, now seen corresponding path program 1 times [2022-03-18 00:46:01,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:01,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312934044] [2022-03-18 00:46:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:01,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:01,752 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:01,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:01,754 INFO L85 PathProgramCache]: Analyzing trace with hash 788460232, now seen corresponding path program 56 times [2022-03-18 00:46:01,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:01,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939235618] [2022-03-18 00:46:01,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:01,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:02,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:02,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:02,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939235618] [2022-03-18 00:46:02,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939235618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:02,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77975261] [2022-03-18 00:46:02,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:46:02,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:02,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:02,088 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:02,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 00:46:02,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:46:02,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:02,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 00:46:02,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:02,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:03,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77975261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:03,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:03,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-18 00:46:03,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:03,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [522229240] [2022-03-18 00:46:03,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [522229240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:03,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:03,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 00:46:03,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243210673] [2022-03-18 00:46:03,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:03,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 00:46:03,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:03,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 00:46:03,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 00:46:03,048 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 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) [2022-03-18 00:46:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:03,306 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2022-03-18 00:46:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 00:46:03,306 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 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 69 [2022-03-18 00:46:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:03,306 INFO L225 Difference]: With dead ends: 82 [2022-03-18 00:46:03,306 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 00:46:03,308 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 00:46:03,308 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:03,308 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:46:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 00:46:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-18 00:46:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-03-18 00:46:03,311 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 69 [2022-03-18 00:46:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:03,311 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-03-18 00:46:03,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 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) [2022-03-18 00:46:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-03-18 00:46:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 00:46:03,311 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:03,312 INFO L500 BasicCegarLoop]: trace histogram [30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:03,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:03,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,SelfDestructingSolverStorable58,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:03,528 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:03,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1002863643, now seen corresponding path program 57 times [2022-03-18 00:46:03,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:03,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1059053970] [2022-03-18 00:46:03,750 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:03,751 INFO L85 PathProgramCache]: Analyzing trace with hash 504901520, now seen corresponding path program 1 times [2022-03-18 00:46:03,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:03,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870739275] [2022-03-18 00:46:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:03,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:03,753 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:03,755 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:03,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1002863643, now seen corresponding path program 58 times [2022-03-18 00:46:03,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:03,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020789536] [2022-03-18 00:46:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:03,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:04,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:04,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:04,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020789536] [2022-03-18 00:46:04,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020789536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:04,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210904630] [2022-03-18 00:46:04,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:46:04,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:04,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:04,061 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:04,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 00:46:04,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:46:04,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:04,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 00:46:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:04,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:04,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210904630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:04,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:04,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-18 00:46:04,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:04,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1059053970] [2022-03-18 00:46:04,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1059053970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:04,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:04,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 00:46:04,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080775307] [2022-03-18 00:46:04,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:04,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 00:46:04,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 00:46:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 00:46:04,983 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 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) [2022-03-18 00:46:05,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:05,267 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-03-18 00:46:05,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 00:46:05,267 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 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 71 [2022-03-18 00:46:05,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:05,268 INFO L225 Difference]: With dead ends: 84 [2022-03-18 00:46:05,268 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 00:46:05,269 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 00:46:05,270 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:05,270 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:46:05,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 00:46:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-18 00:46:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-03-18 00:46:05,275 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 71 [2022-03-18 00:46:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:05,275 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-03-18 00:46:05,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 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) [2022-03-18 00:46:05,275 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-03-18 00:46:05,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 00:46:05,275 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:05,275 INFO L500 BasicCegarLoop]: trace histogram [31, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:05,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-18 00:46:05,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-18 00:46:05,492 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash -183221822, now seen corresponding path program 59 times [2022-03-18 00:46:05,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:05,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1684438854] [2022-03-18 00:46:05,615 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:05,616 INFO L85 PathProgramCache]: Analyzing trace with hash 564006864, now seen corresponding path program 1 times [2022-03-18 00:46:05,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:05,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47091716] [2022-03-18 00:46:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:05,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:05,618 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:05,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:05,630 INFO L85 PathProgramCache]: Analyzing trace with hash -183221822, now seen corresponding path program 60 times [2022-03-18 00:46:05,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:05,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134787333] [2022-03-18 00:46:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:05,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:05,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:05,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:05,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134787333] [2022-03-18 00:46:05,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134787333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:05,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038259893] [2022-03-18 00:46:05,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:46:05,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:05,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:05,984 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:05,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 00:46:06,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:46:06,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:06,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:46:06,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-18 00:46:06,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-18 00:46:06,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038259893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:06,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:06,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 8, 8] total 43 [2022-03-18 00:46:06,273 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:06,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1684438854] [2022-03-18 00:46:06,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1684438854] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:06,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:06,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 00:46:06,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153177680] [2022-03-18 00:46:06,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:06,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 00:46:06,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:06,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 00:46:06,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=1268, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 00:46:06,275 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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) [2022-03-18 00:46:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:06,777 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-03-18 00:46:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 00:46:06,778 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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 73 [2022-03-18 00:46:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:06,778 INFO L225 Difference]: With dead ends: 86 [2022-03-18 00:46:06,778 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 00:46:06,779 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1528, Invalid=3728, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 00:46:06,779 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:06,779 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 34 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 00:46:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-18 00:46:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-03-18 00:46:06,783 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 73 [2022-03-18 00:46:06,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:06,783 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-03-18 00:46:06,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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) [2022-03-18 00:46:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-03-18 00:46:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 00:46:06,783 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:06,783 INFO L500 BasicCegarLoop]: trace histogram [32, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:06,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-18 00:46:06,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61,SelfDestructingSolverStorable62 [2022-03-18 00:46:06,989 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1513552991, now seen corresponding path program 61 times [2022-03-18 00:46:06,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:06,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1214263722] [2022-03-18 00:46:07,125 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash 623112208, now seen corresponding path program 1 times [2022-03-18 00:46:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:07,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954040326] [2022-03-18 00:46:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:07,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:07,148 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:07,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1513552991, now seen corresponding path program 62 times [2022-03-18 00:46:07,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:07,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928984766] [2022-03-18 00:46:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:07,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:07,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:07,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:07,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928984766] [2022-03-18 00:46:07,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928984766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:07,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010577308] [2022-03-18 00:46:07,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:46:07,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:07,398 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:07,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 00:46:07,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:46:07,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:07,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 00:46:07,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:07,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:08,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010577308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:08,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:08,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-18 00:46:08,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:08,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1214263722] [2022-03-18 00:46:08,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1214263722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:08,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:08,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 00:46:08,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544582666] [2022-03-18 00:46:08,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:08,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 00:46:08,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:08,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 00:46:08,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 00:46:08,172 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 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) [2022-03-18 00:46:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:08,479 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-03-18 00:46:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 00:46:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 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 75 [2022-03-18 00:46:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:08,479 INFO L225 Difference]: With dead ends: 88 [2022-03-18 00:46:08,479 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 00:46:08,480 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 00:46:08,481 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:08,481 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 00:46:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-18 00:46:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-03-18 00:46:08,485 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 75 [2022-03-18 00:46:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:08,485 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-03-18 00:46:08,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 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) [2022-03-18 00:46:08,485 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-03-18 00:46:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 00:46:08,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:08,485 INFO L500 BasicCegarLoop]: trace histogram [33, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:08,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:08,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,SelfDestructingSolverStorable64,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:08,701 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash 26575804, now seen corresponding path program 63 times [2022-03-18 00:46:08,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:08,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [274538421] [2022-03-18 00:46:08,820 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash 682217552, now seen corresponding path program 1 times [2022-03-18 00:46:08,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:08,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445836187] [2022-03-18 00:46:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:08,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:08,823 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:08,826 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:08,826 INFO L85 PathProgramCache]: Analyzing trace with hash 26575804, now seen corresponding path program 64 times [2022-03-18 00:46:08,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:08,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116071778] [2022-03-18 00:46:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:08,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:09,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:09,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:09,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116071778] [2022-03-18 00:46:09,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116071778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:09,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531923617] [2022-03-18 00:46:09,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:46:09,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:09,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:09,212 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:09,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 00:46:09,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:46:09,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 00:46:09,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:09,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:10,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531923617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:10,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:10,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-18 00:46:10,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:10,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [274538421] [2022-03-18 00:46:10,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [274538421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:10,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:10,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 00:46:10,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673664721] [2022-03-18 00:46:10,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:10,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 00:46:10,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 00:46:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 00:46:10,412 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 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) [2022-03-18 00:46:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:10,923 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-03-18 00:46:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 00:46:10,923 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 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 77 [2022-03-18 00:46:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:10,924 INFO L225 Difference]: With dead ends: 90 [2022-03-18 00:46:10,924 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 00:46:10,925 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 00:46:10,926 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:10,926 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 39 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 00:46:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-18 00:46:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-03-18 00:46:10,929 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 77 [2022-03-18 00:46:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:10,929 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-03-18 00:46:10,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 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) [2022-03-18 00:46:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-03-18 00:46:10,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 00:46:10,930 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:10,930 INFO L500 BasicCegarLoop]: trace histogram [34, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:10,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:11,130 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,SelfDestructingSolverStorable66,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:11,130 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1265608665, now seen corresponding path program 65 times [2022-03-18 00:46:11,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:11,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1115806938] [2022-03-18 00:46:11,332 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:11,332 INFO L85 PathProgramCache]: Analyzing trace with hash 741322896, now seen corresponding path program 1 times [2022-03-18 00:46:11,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:11,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134447166] [2022-03-18 00:46:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:11,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:11,335 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:11,339 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1265608665, now seen corresponding path program 66 times [2022-03-18 00:46:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:11,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694583148] [2022-03-18 00:46:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:11,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:11,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:11,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:11,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694583148] [2022-03-18 00:46:11,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694583148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:11,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936967437] [2022-03-18 00:46:11,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:46:11,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:11,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:11,641 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:11,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 00:46:11,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:46:11,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:11,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:46:11,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-18 00:46:11,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-18 00:46:12,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936967437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:12,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:12,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 8, 8] total 46 [2022-03-18 00:46:12,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:12,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1115806938] [2022-03-18 00:46:12,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1115806938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:12,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:12,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 00:46:12,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314374771] [2022-03-18 00:46:12,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:12,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 00:46:12,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:12,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 00:46:12,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=1433, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:46:12,035 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 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) [2022-03-18 00:46:12,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:12,645 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2022-03-18 00:46:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 00:46:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 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 79 [2022-03-18 00:46:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:12,646 INFO L225 Difference]: With dead ends: 92 [2022-03-18 00:46:12,646 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 00:46:12,647 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1825, Invalid=4337, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 00:46:12,647 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:12,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 39 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 00:46:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-18 00:46:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-03-18 00:46:12,650 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 79 [2022-03-18 00:46:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:12,651 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-03-18 00:46:12,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 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) [2022-03-18 00:46:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-03-18 00:46:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 00:46:12,651 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:12,651 INFO L500 BasicCegarLoop]: trace histogram [35, 33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:12,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:12,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67,SelfDestructingSolverStorable68 [2022-03-18 00:46:12,852 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2024720202, now seen corresponding path program 67 times [2022-03-18 00:46:12,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:12,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1187249782] [2022-03-18 00:46:13,038 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:13,038 INFO L85 PathProgramCache]: Analyzing trace with hash 800428240, now seen corresponding path program 1 times [2022-03-18 00:46:13,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:13,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281268047] [2022-03-18 00:46:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:13,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:13,041 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:13,042 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:13,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2024720202, now seen corresponding path program 68 times [2022-03-18 00:46:13,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:13,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735553213] [2022-03-18 00:46:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:13,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:13,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:13,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735553213] [2022-03-18 00:46:13,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735553213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904828541] [2022-03-18 00:46:13,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:46:13,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:13,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:13,490 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:13,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 00:46:13,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:46:13,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:13,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 00:46:13,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:13,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:14,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904828541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:14,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:14,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-18 00:46:14,282 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:14,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1187249782] [2022-03-18 00:46:14,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1187249782] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:14,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:14,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 00:46:14,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863347451] [2022-03-18 00:46:14,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:14,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 00:46:14,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 00:46:14,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 00:46:14,284 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 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) [2022-03-18 00:46:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:14,631 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2022-03-18 00:46:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 00:46:14,631 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 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 81 [2022-03-18 00:46:14,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:14,632 INFO L225 Difference]: With dead ends: 94 [2022-03-18 00:46:14,632 INFO L226 Difference]: Without dead ends: 85 [2022-03-18 00:46:14,632 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 00:46:14,633 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:14,633 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:46:14,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-18 00:46:14,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-18 00:46:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:14,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-03-18 00:46:14,641 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 81 [2022-03-18 00:46:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:14,641 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-03-18 00:46:14,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 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) [2022-03-18 00:46:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-03-18 00:46:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 00:46:14,642 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:14,642 INFO L500 BasicCegarLoop]: trace histogram [36, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:14,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:14,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-18 00:46:14,858 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:14,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:14,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1360135763, now seen corresponding path program 69 times [2022-03-18 00:46:14,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:14,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [318242444] [2022-03-18 00:46:14,955 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:14,955 INFO L85 PathProgramCache]: Analyzing trace with hash 859533584, now seen corresponding path program 1 times [2022-03-18 00:46:14,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:14,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107099829] [2022-03-18 00:46:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:14,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:14,958 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:14,962 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:14,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1360135763, now seen corresponding path program 70 times [2022-03-18 00:46:14,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:14,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326336119] [2022-03-18 00:46:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:14,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:15,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:15,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:15,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326336119] [2022-03-18 00:46:15,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326336119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:15,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722712366] [2022-03-18 00:46:15,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:46:15,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:15,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:15,418 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:15,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 00:46:15,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:46:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:15,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 00:46:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:15,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:16,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722712366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:16,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:16,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-18 00:46:16,321 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:16,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [318242444] [2022-03-18 00:46:16,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [318242444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:16,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:16,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 00:46:16,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810490113] [2022-03-18 00:46:16,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:16,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 00:46:16,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:16,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 00:46:16,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 00:46:16,322 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 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) [2022-03-18 00:46:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:16,721 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2022-03-18 00:46:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 00:46:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 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 83 [2022-03-18 00:46:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:16,722 INFO L225 Difference]: With dead ends: 96 [2022-03-18 00:46:16,722 INFO L226 Difference]: Without dead ends: 87 [2022-03-18 00:46:16,723 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 00:46:16,723 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:16,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 44 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:46:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-18 00:46:16,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-18 00:46:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-03-18 00:46:16,731 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 83 [2022-03-18 00:46:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:16,731 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-03-18 00:46:16,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 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) [2022-03-18 00:46:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-03-18 00:46:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 00:46:16,731 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:16,731 INFO L500 BasicCegarLoop]: trace histogram [37, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:16,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:16,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,SelfDestructingSolverStorable72,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:16,948 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1378492240, now seen corresponding path program 71 times [2022-03-18 00:46:16,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1177122347] [2022-03-18 00:46:17,075 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:17,075 INFO L85 PathProgramCache]: Analyzing trace with hash 918638928, now seen corresponding path program 1 times [2022-03-18 00:46:17,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:17,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523232002] [2022-03-18 00:46:17,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:17,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:17,078 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:17,080 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:17,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1378492240, now seen corresponding path program 72 times [2022-03-18 00:46:17,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:17,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633485958] [2022-03-18 00:46:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:17,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:17,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:17,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:17,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633485958] [2022-03-18 00:46:17,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633485958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:17,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669346963] [2022-03-18 00:46:17,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:46:17,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:17,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:17,369 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:17,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 00:46:17,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:46:17,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:17,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:46:17,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-18 00:46:17,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-18 00:46:17,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669346963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:17,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:17,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 8, 8] total 49 [2022-03-18 00:46:17,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:17,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1177122347] [2022-03-18 00:46:17,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1177122347] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:17,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:17,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 00:46:17,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313335021] [2022-03-18 00:46:17,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:17,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 00:46:17,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 00:46:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=1607, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 00:46:17,812 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 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) [2022-03-18 00:46:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:18,497 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2022-03-18 00:46:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 00:46:18,497 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 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 85 [2022-03-18 00:46:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:18,497 INFO L225 Difference]: With dead ends: 98 [2022-03-18 00:46:18,497 INFO L226 Difference]: Without dead ends: 89 [2022-03-18 00:46:18,498 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2149, Invalid=4991, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 00:46:18,498 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:18,499 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-18 00:46:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-18 00:46:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-03-18 00:46:18,502 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 85 [2022-03-18 00:46:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:18,503 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-03-18 00:46:18,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 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) [2022-03-18 00:46:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-03-18 00:46:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 00:46:18,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:18,503 INFO L500 BasicCegarLoop]: trace histogram [38, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:18,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:18,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,SelfDestructingSolverStorable74,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:18,714 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:18,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:18,715 INFO L85 PathProgramCache]: Analyzing trace with hash -385050675, now seen corresponding path program 73 times [2022-03-18 00:46:18,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:18,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1700427072] [2022-03-18 00:46:18,915 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash 977744272, now seen corresponding path program 1 times [2022-03-18 00:46:18,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117863498] [2022-03-18 00:46:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:18,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:18,918 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:18,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash -385050675, now seen corresponding path program 74 times [2022-03-18 00:46:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:18,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391034880] [2022-03-18 00:46:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:18,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:19,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:19,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:19,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391034880] [2022-03-18 00:46:19,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391034880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:19,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872204986] [2022-03-18 00:46:19,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:46:19,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:19,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:19,291 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:19,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 00:46:19,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:46:19,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:19,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 00:46:19,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:19,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:20,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872204986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:20,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:20,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-18 00:46:20,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:20,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1700427072] [2022-03-18 00:46:20,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1700427072] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:20,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:20,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 00:46:20,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989317346] [2022-03-18 00:46:20,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:20,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 00:46:20,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:20,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 00:46:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 00:46:20,202 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 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) [2022-03-18 00:46:20,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:20,692 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2022-03-18 00:46:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 00:46:20,692 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 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 87 [2022-03-18 00:46:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:20,693 INFO L225 Difference]: With dead ends: 100 [2022-03-18 00:46:20,693 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 00:46:20,694 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 00:46:20,695 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:20,695 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 00:46:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-18 00:46:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-03-18 00:46:20,702 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 87 [2022-03-18 00:46:20,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:20,703 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-03-18 00:46:20,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 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) [2022-03-18 00:46:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-03-18 00:46:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 00:46:20,704 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:20,704 INFO L500 BasicCegarLoop]: trace histogram [39, 37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:20,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:20,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,SelfDestructingSolverStorable76,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:20,920 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:20,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:20,920 INFO L85 PathProgramCache]: Analyzing trace with hash 829553578, now seen corresponding path program 75 times [2022-03-18 00:46:20,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:20,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1868382592] [2022-03-18 00:46:21,047 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1036849616, now seen corresponding path program 1 times [2022-03-18 00:46:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809690174] [2022-03-18 00:46:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:21,051 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:21,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:21,076 INFO L85 PathProgramCache]: Analyzing trace with hash 829553578, now seen corresponding path program 76 times [2022-03-18 00:46:21,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:21,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266380937] [2022-03-18 00:46:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:21,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:21,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:21,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:21,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266380937] [2022-03-18 00:46:21,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266380937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:21,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125927853] [2022-03-18 00:46:21,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:46:21,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:21,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:21,410 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:21,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 00:46:21,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:46:21,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:21,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 00:46:21,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:21,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:22,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125927853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:22,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:22,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-18 00:46:22,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:22,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1868382592] [2022-03-18 00:46:22,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1868382592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:22,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:22,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 00:46:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681362303] [2022-03-18 00:46:22,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:22,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 00:46:22,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 00:46:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 00:46:22,519 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 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) [2022-03-18 00:46:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:22,953 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2022-03-18 00:46:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 00:46:22,953 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 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 89 [2022-03-18 00:46:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:22,958 INFO L225 Difference]: With dead ends: 102 [2022-03-18 00:46:22,958 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 00:46:22,959 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-18 00:46:22,959 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:22,959 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 39 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:46:22,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 00:46:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-18 00:46:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-03-18 00:46:22,964 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 89 [2022-03-18 00:46:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:22,965 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-03-18 00:46:22,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 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) [2022-03-18 00:46:22,965 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-03-18 00:46:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 00:46:22,965 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:22,965 INFO L500 BasicCegarLoop]: trace histogram [40, 38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:22,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:23,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77,SelfDestructingSolverStorable78 [2022-03-18 00:46:23,179 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash -166863801, now seen corresponding path program 77 times [2022-03-18 00:46:23,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:23,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1784523523] [2022-03-18 00:46:23,330 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1095954960, now seen corresponding path program 1 times [2022-03-18 00:46:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:23,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540071890] [2022-03-18 00:46:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:23,333 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:23,352 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash -166863801, now seen corresponding path program 78 times [2022-03-18 00:46:23,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:23,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408496088] [2022-03-18 00:46:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:23,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:23,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:23,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408496088] [2022-03-18 00:46:23,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408496088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:23,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086573577] [2022-03-18 00:46:23,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:46:23,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:23,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:23,709 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:23,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 00:46:23,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:46:23,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:23,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:46:23,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-18 00:46:23,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-18 00:46:24,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086573577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:24,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:24,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 8, 8] total 52 [2022-03-18 00:46:24,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:24,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1784523523] [2022-03-18 00:46:24,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1784523523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:24,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:24,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 00:46:24,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510738038] [2022-03-18 00:46:24,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:24,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 00:46:24,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 00:46:24,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=1790, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:46:24,010 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 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) [2022-03-18 00:46:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:24,505 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-03-18 00:46:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 00:46:24,505 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 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 91 [2022-03-18 00:46:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:24,506 INFO L225 Difference]: With dead ends: 104 [2022-03-18 00:46:24,506 INFO L226 Difference]: Without dead ends: 95 [2022-03-18 00:46:24,506 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2500, Invalid=5690, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 00:46:24,506 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:24,507 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-18 00:46:24,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-18 00:46:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-03-18 00:46:24,522 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 91 [2022-03-18 00:46:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:24,522 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-03-18 00:46:24,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 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) [2022-03-18 00:46:24,522 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-03-18 00:46:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 00:46:24,522 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:24,522 INFO L500 BasicCegarLoop]: trace histogram [41, 39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:24,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-18 00:46:24,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-18 00:46:24,739 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:24,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:24,739 INFO L85 PathProgramCache]: Analyzing trace with hash 53741988, now seen corresponding path program 79 times [2022-03-18 00:46:24,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:24,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1018250151] [2022-03-18 00:46:24,871 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:24,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1155060304, now seen corresponding path program 1 times [2022-03-18 00:46:24,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:24,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29516981] [2022-03-18 00:46:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:24,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:24,896 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:24,900 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash 53741988, now seen corresponding path program 80 times [2022-03-18 00:46:24,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:24,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533050760] [2022-03-18 00:46:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:24,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:25,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 120 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:25,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:25,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533050760] [2022-03-18 00:46:25,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533050760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:25,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382561146] [2022-03-18 00:46:25,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:46:25,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:25,260 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:25,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 00:46:25,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:46:25,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:25,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 00:46:25,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 120 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:25,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 120 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:26,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382561146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:26,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:26,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-18 00:46:26,293 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:26,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1018250151] [2022-03-18 00:46:26,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1018250151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:26,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:26,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 00:46:26,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168283207] [2022-03-18 00:46:26,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:26,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 00:46:26,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:26,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 00:46:26,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 00:46:26,294 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 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) [2022-03-18 00:46:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:26,742 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2022-03-18 00:46:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 00:46:26,742 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 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 93 [2022-03-18 00:46:26,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:26,743 INFO L225 Difference]: With dead ends: 106 [2022-03-18 00:46:26,743 INFO L226 Difference]: Without dead ends: 97 [2022-03-18 00:46:26,745 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-03-18 00:46:26,749 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:26,750 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 34 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-18 00:46:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-18 00:46:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-03-18 00:46:26,755 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 93 [2022-03-18 00:46:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:26,768 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-03-18 00:46:26,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 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) [2022-03-18 00:46:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-03-18 00:46:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 00:46:26,769 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:26,769 INFO L500 BasicCegarLoop]: trace histogram [42, 40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:26,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:26,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81,SelfDestructingSolverStorable82 [2022-03-18 00:46:26,991 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:26,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1602507713, now seen corresponding path program 81 times [2022-03-18 00:46:26,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:26,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1515170363] [2022-03-18 00:46:27,112 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1214165648, now seen corresponding path program 1 times [2022-03-18 00:46:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:27,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695534133] [2022-03-18 00:46:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:27,115 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:27,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1602507713, now seen corresponding path program 82 times [2022-03-18 00:46:27,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:27,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146995481] [2022-03-18 00:46:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:27,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:27,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1640 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:27,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:27,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146995481] [2022-03-18 00:46:27,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146995481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:27,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580204679] [2022-03-18 00:46:27,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:46:27,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:27,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:27,502 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:27,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 00:46:27,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:46:27,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:27,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 00:46:27,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1640 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:27,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1640 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:29,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580204679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:29,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:29,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-18 00:46:29,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1515170363] [2022-03-18 00:46:29,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1515170363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:29,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:29,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 00:46:29,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518097500] [2022-03-18 00:46:29,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:29,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 00:46:29,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:29,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 00:46:29,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 00:46:29,238 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 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) [2022-03-18 00:46:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:29,979 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2022-03-18 00:46:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 00:46:29,979 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 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 95 [2022-03-18 00:46:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:29,980 INFO L225 Difference]: With dead ends: 108 [2022-03-18 00:46:29,980 INFO L226 Difference]: Without dead ends: 99 [2022-03-18 00:46:29,981 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 00:46:29,981 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:29,982 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 24 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-18 00:46:29,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-18 00:46:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-03-18 00:46:29,985 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 95 [2022-03-18 00:46:29,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:29,986 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-03-18 00:46:29,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 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) [2022-03-18 00:46:29,986 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-03-18 00:46:29,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 00:46:29,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:29,987 INFO L500 BasicCegarLoop]: trace histogram [43, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:30,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:30,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,SelfDestructingSolverStorable84,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:30,203 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:30,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:30,203 INFO L85 PathProgramCache]: Analyzing trace with hash -387282274, now seen corresponding path program 83 times [2022-03-18 00:46:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:30,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1695015198] [2022-03-18 00:46:30,352 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:30,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1273270992, now seen corresponding path program 1 times [2022-03-18 00:46:30,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:30,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193485602] [2022-03-18 00:46:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:30,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:30,356 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:30,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:30,358 INFO L85 PathProgramCache]: Analyzing trace with hash -387282274, now seen corresponding path program 84 times [2022-03-18 00:46:30,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:30,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590129948] [2022-03-18 00:46:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:30,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:30,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1722 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:30,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:30,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590129948] [2022-03-18 00:46:30,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590129948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:30,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517643600] [2022-03-18 00:46:30,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:46:30,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:30,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:30,722 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:30,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 00:46:30,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:46:30,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:30,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:46:30,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-18 00:46:30,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-18 00:46:31,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517643600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:31,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:31,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 8, 8] total 55 [2022-03-18 00:46:31,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:31,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1695015198] [2022-03-18 00:46:31,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1695015198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:31,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:31,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 00:46:31,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511552290] [2022-03-18 00:46:31,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:31,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 00:46:31,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:31,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 00:46:31,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=1982, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 00:46:31,184 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 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) [2022-03-18 00:46:32,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:32,061 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2022-03-18 00:46:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 00:46:32,061 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 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 97 [2022-03-18 00:46:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:32,062 INFO L225 Difference]: With dead ends: 110 [2022-03-18 00:46:32,062 INFO L226 Difference]: Without dead ends: 101 [2022-03-18 00:46:32,063 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2878, Invalid=6434, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 00:46:32,063 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:32,064 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-18 00:46:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-18 00:46:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:32,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-03-18 00:46:32,067 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 97 [2022-03-18 00:46:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:32,067 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-03-18 00:46:32,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 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) [2022-03-18 00:46:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-03-18 00:46:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 00:46:32,068 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:32,068 INFO L500 BasicCegarLoop]: trace histogram [44, 42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:32,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:32,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,SelfDestructingSolverStorable86,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:32,269 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:32,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1315013061, now seen corresponding path program 85 times [2022-03-18 00:46:32,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:32,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543616972] [2022-03-18 00:46:32,433 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:32,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1332376336, now seen corresponding path program 1 times [2022-03-18 00:46:32,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:32,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825998676] [2022-03-18 00:46:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:32,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:32,436 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:32,438 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:32,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1315013061, now seen corresponding path program 86 times [2022-03-18 00:46:32,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:32,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715432326] [2022-03-18 00:46:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:32,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:32,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 129 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:32,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:32,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715432326] [2022-03-18 00:46:32,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715432326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:32,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579597984] [2022-03-18 00:46:32,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:46:32,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:32,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:32,853 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:32,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-18 00:46:32,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:46:32,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:32,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 00:46:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 129 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:33,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 129 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:34,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579597984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:34,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:34,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-18 00:46:34,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:34,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543616972] [2022-03-18 00:46:34,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543616972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:34,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:34,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 00:46:34,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257856790] [2022-03-18 00:46:34,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:34,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 00:46:34,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:34,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 00:46:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 00:46:34,401 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 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) [2022-03-18 00:46:35,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:35,249 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2022-03-18 00:46:35,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 00:46:35,249 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 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 99 [2022-03-18 00:46:35,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:35,250 INFO L225 Difference]: With dead ends: 112 [2022-03-18 00:46:35,250 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 00:46:35,251 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-03-18 00:46:35,252 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:35,252 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 39 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:35,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 00:46:35,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-18 00:46:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:35,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-03-18 00:46:35,256 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 99 [2022-03-18 00:46:35,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:35,256 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-03-18 00:46:35,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 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) [2022-03-18 00:46:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-03-18 00:46:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 00:46:35,256 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:35,256 INFO L500 BasicCegarLoop]: trace histogram [45, 43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:35,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:35,457 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87,SelfDestructingSolverStorable88 [2022-03-18 00:46:35,457 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:35,457 INFO L85 PathProgramCache]: Analyzing trace with hash 488898200, now seen corresponding path program 87 times [2022-03-18 00:46:35,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:35,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78431770] [2022-03-18 00:46:35,659 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:35,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1391481680, now seen corresponding path program 1 times [2022-03-18 00:46:35,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:35,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445568359] [2022-03-18 00:46:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:35,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:35,661 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:35,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:35,663 INFO L85 PathProgramCache]: Analyzing trace with hash 488898200, now seen corresponding path program 88 times [2022-03-18 00:46:35,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:35,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850074046] [2022-03-18 00:46:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:35,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:36,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:36,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:36,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850074046] [2022-03-18 00:46:36,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850074046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:36,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443197068] [2022-03-18 00:46:36,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:46:36,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:36,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:36,322 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:36,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-18 00:46:36,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:46:36,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:36,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 00:46:36,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:36,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:38,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443197068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:38,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:38,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-18 00:46:38,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:38,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78431770] [2022-03-18 00:46:38,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78431770] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:38,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:38,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 00:46:38,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667002976] [2022-03-18 00:46:38,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:38,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 00:46:38,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:38,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 00:46:38,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 00:46:38,239 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 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) [2022-03-18 00:46:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:39,097 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2022-03-18 00:46:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 00:46:39,098 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 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 101 [2022-03-18 00:46:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:39,098 INFO L225 Difference]: With dead ends: 114 [2022-03-18 00:46:39,098 INFO L226 Difference]: Without dead ends: 105 [2022-03-18 00:46:39,099 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 00:46:39,100 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:39,100 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-18 00:46:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-03-18 00:46:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-03-18 00:46:39,104 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 101 [2022-03-18 00:46:39,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:39,104 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-03-18 00:46:39,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 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) [2022-03-18 00:46:39,104 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-03-18 00:46:39,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 00:46:39,104 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:39,104 INFO L500 BasicCegarLoop]: trace histogram [46, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:39,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:39,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-18 00:46:39,305 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1119167563, now seen corresponding path program 89 times [2022-03-18 00:46:39,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:39,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [562167394] [2022-03-18 00:46:39,493 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:39,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1450587024, now seen corresponding path program 1 times [2022-03-18 00:46:39,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:39,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871014089] [2022-03-18 00:46:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:39,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:39,495 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:39,497 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1119167563, now seen corresponding path program 90 times [2022-03-18 00:46:39,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:39,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350338713] [2022-03-18 00:46:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:39,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:40,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:40,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350338713] [2022-03-18 00:46:40,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350338713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:40,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362330045] [2022-03-18 00:46:40,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:46:40,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:40,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:40,195 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:40,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-18 00:46:40,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:46:40,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:46:40,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-03-18 00:46:40,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-03-18 00:46:40,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362330045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:40,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:40,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 8, 8] total 58 [2022-03-18 00:46:40,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [562167394] [2022-03-18 00:46:40,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [562167394] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:40,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:40,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-18 00:46:40,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159117446] [2022-03-18 00:46:40,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:40,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 00:46:40,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:40,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 00:46:40,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1123, Invalid=2183, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 00:46:40,736 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 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) [2022-03-18 00:46:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:41,562 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-03-18 00:46:41,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 00:46:41,562 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 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 103 [2022-03-18 00:46:41,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:41,576 INFO L225 Difference]: With dead ends: 116 [2022-03-18 00:46:41,576 INFO L226 Difference]: Without dead ends: 107 [2022-03-18 00:46:41,577 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3283, Invalid=7223, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:46:41,578 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:41,578 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 39 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:41,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-18 00:46:41,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-03-18 00:46:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-03-18 00:46:41,582 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 103 [2022-03-18 00:46:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:41,583 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-03-18 00:46:41,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 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) [2022-03-18 00:46:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-03-18 00:46:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 00:46:41,583 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:41,583 INFO L500 BasicCegarLoop]: trace histogram [47, 45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:41,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-18 00:46:41,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,SelfDestructingSolverStorable92,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:41,784 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash -282139246, now seen corresponding path program 91 times [2022-03-18 00:46:41,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:41,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1155652984] [2022-03-18 00:46:41,933 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1509692368, now seen corresponding path program 1 times [2022-03-18 00:46:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:41,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396085036] [2022-03-18 00:46:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:41,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:41,936 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:41,938 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:41,938 INFO L85 PathProgramCache]: Analyzing trace with hash -282139246, now seen corresponding path program 92 times [2022-03-18 00:46:41,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:41,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670005313] [2022-03-18 00:46:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:41,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:42,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 138 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:42,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:42,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670005313] [2022-03-18 00:46:42,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670005313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:42,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672166632] [2022-03-18 00:46:42,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:46:42,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:42,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:42,758 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:42,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-18 00:46:42,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:46:42,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:42,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 00:46:42,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 138 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:42,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 138 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:45,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672166632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:45,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:45,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-18 00:46:45,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:45,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1155652984] [2022-03-18 00:46:45,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1155652984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:45,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:45,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 00:46:45,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322960883] [2022-03-18 00:46:45,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:45,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 00:46:45,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 00:46:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 00:46:45,019 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 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) [2022-03-18 00:46:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:45,959 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2022-03-18 00:46:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 00:46:45,960 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 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 105 [2022-03-18 00:46:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:45,960 INFO L225 Difference]: With dead ends: 118 [2022-03-18 00:46:45,960 INFO L226 Difference]: Without dead ends: 109 [2022-03-18 00:46:45,962 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-03-18 00:46:45,962 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:45,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:45,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-18 00:46:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-18 00:46:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-03-18 00:46:45,966 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 105 [2022-03-18 00:46:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:45,966 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-03-18 00:46:45,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 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) [2022-03-18 00:46:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-03-18 00:46:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 00:46:45,967 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:45,967 INFO L500 BasicCegarLoop]: trace histogram [48, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:45,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-18 00:46:46,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,SelfDestructingSolverStorable94,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:46,183 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash 943189039, now seen corresponding path program 93 times [2022-03-18 00:46:46,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:46,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1243608659] [2022-03-18 00:46:46,394 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1568797712, now seen corresponding path program 1 times [2022-03-18 00:46:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:46,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67183516] [2022-03-18 00:46:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:46,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:46,397 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:46,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash 943189039, now seen corresponding path program 94 times [2022-03-18 00:46:46,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:46,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467976660] [2022-03-18 00:46:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:46,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:47,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 2162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:47,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:47,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467976660] [2022-03-18 00:46:47,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467976660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:47,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353721342] [2022-03-18 00:46:47,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:46:47,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:47,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:47,142 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:47,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-18 00:46:47,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:46:47,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 00:46:47,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 2162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:47,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 2162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:49,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353721342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:49,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:49,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-18 00:46:49,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:49,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1243608659] [2022-03-18 00:46:49,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1243608659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:49,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:49,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-18 00:46:49,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546052013] [2022-03-18 00:46:49,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:49,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 00:46:49,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:49,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 00:46:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 00:46:49,360 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 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) [2022-03-18 00:46:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:50,336 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-03-18 00:46:50,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 00:46:50,336 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 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 107 [2022-03-18 00:46:50,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:50,337 INFO L225 Difference]: With dead ends: 120 [2022-03-18 00:46:50,337 INFO L226 Difference]: Without dead ends: 111 [2022-03-18 00:46:50,339 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-18 00:46:50,339 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:50,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 34 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:50,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-18 00:46:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-18 00:46:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 106 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-03-18 00:46:50,343 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 107 [2022-03-18 00:46:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:50,343 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-03-18 00:46:50,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 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) [2022-03-18 00:46:50,343 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-03-18 00:46:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 00:46:50,344 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:50,344 INFO L500 BasicCegarLoop]: trace histogram [49, 47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:50,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-18 00:46:50,544 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,SelfDestructingSolverStorable96,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:50,544 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:50,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:50,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1662631820, now seen corresponding path program 95 times [2022-03-18 00:46:50,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:50,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1803170037] [2022-03-18 00:46:50,692 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1627903056, now seen corresponding path program 1 times [2022-03-18 00:46:50,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:50,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547217920] [2022-03-18 00:46:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:50,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:50,694 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:50,696 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:50,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1662631820, now seen corresponding path program 96 times [2022-03-18 00:46:50,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:50,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246798121] [2022-03-18 00:46:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:50,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:51,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 2256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:51,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:51,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246798121] [2022-03-18 00:46:51,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246798121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:51,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138581481] [2022-03-18 00:46:51,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:46:51,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:51,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:51,457 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:51,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-18 00:46:51,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:46:51,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:51,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:46:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-03-18 00:46:51,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-03-18 00:46:51,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138581481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:51,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:51,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 8, 8] total 61 [2022-03-18 00:46:51,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:51,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1803170037] [2022-03-18 00:46:51,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1803170037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:51,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:51,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-18 00:46:51,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330815728] [2022-03-18 00:46:51,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:52,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 00:46:52,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:52,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 00:46:52,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=2393, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 00:46:52,000 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 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) [2022-03-18 00:46:52,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:52,993 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2022-03-18 00:46:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 00:46:52,993 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 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 109 [2022-03-18 00:46:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:52,994 INFO L225 Difference]: With dead ends: 122 [2022-03-18 00:46:52,994 INFO L226 Difference]: Without dead ends: 113 [2022-03-18 00:46:52,995 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3715, Invalid=8057, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 00:46:52,995 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:52,995 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 44 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:52,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-18 00:46:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-18 00:46:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-03-18 00:46:53,000 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 109 [2022-03-18 00:46:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:53,000 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-03-18 00:46:53,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 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) [2022-03-18 00:46:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-03-18 00:46:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-18 00:46:53,001 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:53,001 INFO L500 BasicCegarLoop]: trace histogram [50, 48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:53,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:53,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-18 00:46:53,207 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:53,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1557409705, now seen corresponding path program 97 times [2022-03-18 00:46:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:53,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [53028685] [2022-03-18 00:46:53,366 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:53,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1687008400, now seen corresponding path program 1 times [2022-03-18 00:46:53,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:53,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003274255] [2022-03-18 00:46:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:53,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:53,369 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:53,371 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:53,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1557409705, now seen corresponding path program 98 times [2022-03-18 00:46:53,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:53,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349721241] [2022-03-18 00:46:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:53,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:53,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 147 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:53,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:53,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349721241] [2022-03-18 00:46:53,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349721241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:53,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221642] [2022-03-18 00:46:53,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:46:53,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:53,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:53,928 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:53,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-18 00:46:53,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:46:53,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:53,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 00:46:53,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 147 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:54,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 147 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:55,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:55,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:55,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-18 00:46:55,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:55,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [53028685] [2022-03-18 00:46:55,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [53028685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:55,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:55,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-18 00:46:55,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869202434] [2022-03-18 00:46:55,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:55,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-18 00:46:55,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:55,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-18 00:46:55,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 00:46:55,477 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 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) [2022-03-18 00:46:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:56,122 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-03-18 00:46:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 00:46:56,122 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 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 111 [2022-03-18 00:46:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:56,123 INFO L225 Difference]: With dead ends: 124 [2022-03-18 00:46:56,123 INFO L226 Difference]: Without dead ends: 115 [2022-03-18 00:46:56,124 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-03-18 00:46:56,129 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:56,129 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 34 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:46:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-18 00:46:56,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-18 00:46:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-03-18 00:46:56,137 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 111 [2022-03-18 00:46:56,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:56,137 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-03-18 00:46:56,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 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) [2022-03-18 00:46:56,137 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-03-18 00:46:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 00:46:56,137 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:56,138 INFO L500 BasicCegarLoop]: trace histogram [51, 49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:56,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:56,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99,SelfDestructingSolverStorable100 [2022-03-18 00:46:56,355 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:56,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash -776795002, now seen corresponding path program 99 times [2022-03-18 00:46:56,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:56,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1108277131] [2022-03-18 00:46:56,519 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:46:56,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1746113744, now seen corresponding path program 1 times [2022-03-18 00:46:56,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:56,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001782904] [2022-03-18 00:46:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:56,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:56,537 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:46:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:46:56,540 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:46:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash -776795002, now seen corresponding path program 100 times [2022-03-18 00:46:56,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:56,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800877967] [2022-03-18 00:46:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:56,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:57,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 2450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:57,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:57,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800877967] [2022-03-18 00:46:57,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800877967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:57,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112944083] [2022-03-18 00:46:57,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:46:57,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:57,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:57,031 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:46:57,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-18 00:46:57,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:46:57,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:57,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 00:46:57,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 2450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:57,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 2450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:46:59,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112944083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:59,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:59,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-18 00:46:59,019 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:59,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1108277131] [2022-03-18 00:46:59,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1108277131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:59,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:59,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 00:46:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088654906] [2022-03-18 00:46:59,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:59,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 00:46:59,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:59,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 00:46:59,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:46:59,021 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 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) [2022-03-18 00:47:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:00,080 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2022-03-18 00:47:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 00:47:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 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 113 [2022-03-18 00:47:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:00,081 INFO L225 Difference]: With dead ends: 126 [2022-03-18 00:47:00,081 INFO L226 Difference]: Without dead ends: 117 [2022-03-18 00:47:00,082 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-18 00:47:00,083 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:00,083 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 24 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:00,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-18 00:47:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-03-18 00:47:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-03-18 00:47:00,087 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 113 [2022-03-18 00:47:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:00,087 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-03-18 00:47:00,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 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) [2022-03-18 00:47:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-03-18 00:47:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 00:47:00,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:00,089 INFO L500 BasicCegarLoop]: trace histogram [52, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:00,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-18 00:47:00,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101,SelfDestructingSolverStorable102 [2022-03-18 00:47:00,303 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:00,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1974589917, now seen corresponding path program 101 times [2022-03-18 00:47:00,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:00,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480363914] [2022-03-18 00:47:00,450 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:00,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1805219088, now seen corresponding path program 1 times [2022-03-18 00:47:00,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:00,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167487851] [2022-03-18 00:47:00,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:00,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:00,453 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:00,455 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1974589917, now seen corresponding path program 102 times [2022-03-18 00:47:00,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:00,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485880958] [2022-03-18 00:47:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:00,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:01,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 153 proven. 2550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:01,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:01,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485880958] [2022-03-18 00:47:01,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485880958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:01,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157572406] [2022-03-18 00:47:01,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:47:01,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:01,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:01,214 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:01,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-18 00:47:01,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:47:01,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:01,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:47:01,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 00:47:01,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 00:47:01,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157572406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:01,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:01,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 8, 8] total 64 [2022-03-18 00:47:01,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:01,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480363914] [2022-03-18 00:47:01,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480363914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:01,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:01,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-18 00:47:01,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300705438] [2022-03-18 00:47:01,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:01,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-18 00:47:01,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:01,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-18 00:47:01,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1420, Invalid=2612, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:47:01,769 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 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) [2022-03-18 00:47:02,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:02,902 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2022-03-18 00:47:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 00:47:02,903 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 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 115 [2022-03-18 00:47:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:02,903 INFO L225 Difference]: With dead ends: 128 [2022-03-18 00:47:02,903 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 00:47:02,904 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4174, Invalid=8936, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 00:47:02,905 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:02,905 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 29 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:02,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 00:47:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-18 00:47:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-03-18 00:47:02,909 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 115 [2022-03-18 00:47:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:02,909 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-03-18 00:47:02,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 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) [2022-03-18 00:47:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-03-18 00:47:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 00:47:02,917 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:02,917 INFO L500 BasicCegarLoop]: trace histogram [53, 51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:02,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-18 00:47:03,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-18 00:47:03,118 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:03,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:03,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2004267904, now seen corresponding path program 103 times [2022-03-18 00:47:03,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:03,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2026821126] [2022-03-18 00:47:03,283 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:03,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1864324432, now seen corresponding path program 1 times [2022-03-18 00:47:03,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:03,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35892507] [2022-03-18 00:47:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:03,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:03,285 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:03,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:03,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2004267904, now seen corresponding path program 104 times [2022-03-18 00:47:03,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:03,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709035116] [2022-03-18 00:47:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:03,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:03,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 156 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:03,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:03,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709035116] [2022-03-18 00:47:03,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709035116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:03,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461100398] [2022-03-18 00:47:03,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:47:03,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:03,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:03,917 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:03,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-18 00:47:03,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:47:03,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:03,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 00:47:03,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 156 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:04,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 156 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:05,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461100398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:05,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:05,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-18 00:47:05,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:05,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2026821126] [2022-03-18 00:47:05,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2026821126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:05,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:05,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-18 00:47:05,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20482382] [2022-03-18 00:47:05,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:05,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 00:47:05,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:05,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 00:47:05,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-03-18 00:47:05,558 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 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) [2022-03-18 00:47:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:06,421 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2022-03-18 00:47:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 00:47:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 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 117 [2022-03-18 00:47:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:06,421 INFO L225 Difference]: With dead ends: 130 [2022-03-18 00:47:06,421 INFO L226 Difference]: Without dead ends: 121 [2022-03-18 00:47:06,423 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-03-18 00:47:06,423 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:06,423 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 44 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-18 00:47:06,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-18 00:47:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-03-18 00:47:06,427 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 117 [2022-03-18 00:47:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:06,427 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-03-18 00:47:06,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 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) [2022-03-18 00:47:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-03-18 00:47:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-18 00:47:06,428 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:06,428 INFO L500 BasicCegarLoop]: trace histogram [54, 52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:06,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-18 00:47:06,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105,SelfDestructingSolverStorable106 [2022-03-18 00:47:06,645 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:06,645 INFO L85 PathProgramCache]: Analyzing trace with hash -460042339, now seen corresponding path program 105 times [2022-03-18 00:47:06,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:06,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1470066008] [2022-03-18 00:47:06,914 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:06,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1923429776, now seen corresponding path program 1 times [2022-03-18 00:47:06,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:06,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397611611] [2022-03-18 00:47:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:06,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:06,917 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:06,921 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:06,921 INFO L85 PathProgramCache]: Analyzing trace with hash -460042339, now seen corresponding path program 106 times [2022-03-18 00:47:06,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:06,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560060488] [2022-03-18 00:47:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:06,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:07,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 2756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:07,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:07,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560060488] [2022-03-18 00:47:07,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560060488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:07,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237471774] [2022-03-18 00:47:07,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:47:07,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:07,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:07,731 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:07,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-18 00:47:07,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:47:07,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:07,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 00:47:07,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 2756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:07,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 2756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:10,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237471774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:10,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:10,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-18 00:47:10,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:10,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1470066008] [2022-03-18 00:47:10,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1470066008] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:10,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:10,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-18 00:47:10,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833224032] [2022-03-18 00:47:10,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:10,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 00:47:10,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:10,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 00:47:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-18 00:47:10,487 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 states have internal predecessors, (115), 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) [2022-03-18 00:47:11,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:11,679 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2022-03-18 00:47:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 00:47:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 states have internal predecessors, (115), 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 119 [2022-03-18 00:47:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:11,680 INFO L225 Difference]: With dead ends: 132 [2022-03-18 00:47:11,680 INFO L226 Difference]: Without dead ends: 123 [2022-03-18 00:47:11,682 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-18 00:47:11,683 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:11,683 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-18 00:47:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-03-18 00:47:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 118 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-03-18 00:47:11,687 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 119 [2022-03-18 00:47:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:11,687 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-03-18 00:47:11,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 states have internal predecessors, (115), 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) [2022-03-18 00:47:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-03-18 00:47:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 00:47:11,688 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:11,688 INFO L500 BasicCegarLoop]: trace histogram [55, 53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:11,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-18 00:47:11,904 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-18 00:47:11,905 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1777008506, now seen corresponding path program 107 times [2022-03-18 00:47:11,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:11,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [94454740] [2022-03-18 00:47:12,154 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:12,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1982535120, now seen corresponding path program 1 times [2022-03-18 00:47:12,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:12,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78952438] [2022-03-18 00:47:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:12,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:12,160 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:12,163 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:12,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1777008506, now seen corresponding path program 108 times [2022-03-18 00:47:12,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:12,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831949735] [2022-03-18 00:47:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:12,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:13,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 162 proven. 2862 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:13,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:13,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831949735] [2022-03-18 00:47:13,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831949735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:13,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595157119] [2022-03-18 00:47:13,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:47:13,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:13,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:13,038 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:13,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-18 00:47:13,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:47:13,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:13,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:47:13,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-03-18 00:47:13,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-03-18 00:47:13,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595157119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:13,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:13,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 8, 8] total 67 [2022-03-18 00:47:13,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:13,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [94454740] [2022-03-18 00:47:13,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [94454740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:13,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:13,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-18 00:47:13,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831787184] [2022-03-18 00:47:13,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:13,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 00:47:13,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 00:47:13,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1582, Invalid=2840, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:47:13,596 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 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) [2022-03-18 00:47:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:14,965 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2022-03-18 00:47:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 00:47:14,966 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 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 121 [2022-03-18 00:47:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:14,966 INFO L225 Difference]: With dead ends: 134 [2022-03-18 00:47:14,966 INFO L226 Difference]: Without dead ends: 125 [2022-03-18 00:47:14,967 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4660, Invalid=9860, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 00:47:14,968 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:14,968 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 29 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-18 00:47:14,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-03-18 00:47:14,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:14,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-03-18 00:47:14,972 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 121 [2022-03-18 00:47:14,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:14,972 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-03-18 00:47:14,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 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) [2022-03-18 00:47:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-03-18 00:47:14,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-18 00:47:14,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:14,973 INFO L500 BasicCegarLoop]: trace histogram [56, 54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:14,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-18 00:47:15,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,SelfDestructingSolverStorable109,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:15,173 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:15,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:15,174 INFO L85 PathProgramCache]: Analyzing trace with hash -195744745, now seen corresponding path program 109 times [2022-03-18 00:47:15,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:15,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [172710203] [2022-03-18 00:47:15,333 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2041640464, now seen corresponding path program 1 times [2022-03-18 00:47:15,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:15,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287977794] [2022-03-18 00:47:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:15,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:15,335 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:15,337 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:15,337 INFO L85 PathProgramCache]: Analyzing trace with hash -195744745, now seen corresponding path program 110 times [2022-03-18 00:47:15,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:15,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12470238] [2022-03-18 00:47:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:15,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:16,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 165 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:16,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:16,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12470238] [2022-03-18 00:47:16,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12470238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634546951] [2022-03-18 00:47:16,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:47:16,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:16,281 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:16,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-18 00:47:16,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:47:16,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 00:47:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 165 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:16,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 165 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:18,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634546951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:18,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:18,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-18 00:47:18,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:18,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [172710203] [2022-03-18 00:47:18,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [172710203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:18,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:18,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-18 00:47:18,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042976500] [2022-03-18 00:47:18,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:18,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-18 00:47:18,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-18 00:47:18,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-03-18 00:47:18,055 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 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) [2022-03-18 00:47:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:19,074 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2022-03-18 00:47:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 00:47:19,075 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 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 123 [2022-03-18 00:47:19,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:19,075 INFO L225 Difference]: With dead ends: 136 [2022-03-18 00:47:19,075 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 00:47:19,077 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-03-18 00:47:19,077 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:19,077 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 00:47:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-18 00:47:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:19,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-03-18 00:47:19,081 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 123 [2022-03-18 00:47:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:19,081 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-03-18 00:47:19,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 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) [2022-03-18 00:47:19,082 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-03-18 00:47:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-18 00:47:19,082 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:19,082 INFO L500 BasicCegarLoop]: trace histogram [57, 55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:19,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-18 00:47:19,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,SelfDestructingSolverStorable112,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:19,299 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:19,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1931041420, now seen corresponding path program 111 times [2022-03-18 00:47:19,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:19,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1105244945] [2022-03-18 00:47:19,433 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2100745808, now seen corresponding path program 1 times [2022-03-18 00:47:19,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:19,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617663571] [2022-03-18 00:47:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:19,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:19,436 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:19,440 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1931041420, now seen corresponding path program 112 times [2022-03-18 00:47:19,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:19,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387401061] [2022-03-18 00:47:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:19,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 3080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:20,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:20,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387401061] [2022-03-18 00:47:20,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387401061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:20,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112062234] [2022-03-18 00:47:20,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:47:20,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:20,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:20,480 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:20,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-18 00:47:20,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:47:20,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:20,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 00:47:20,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 3080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:20,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 3080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:23,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112062234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:23,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:23,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-18 00:47:23,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:23,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1105244945] [2022-03-18 00:47:23,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1105244945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:23,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:23,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-18 00:47:23,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751165610] [2022-03-18 00:47:23,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:23,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 00:47:23,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:23,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 00:47:23,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-18 00:47:23,477 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 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) [2022-03-18 00:47:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:24,284 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2022-03-18 00:47:24,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 00:47:24,284 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 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 125 [2022-03-18 00:47:24,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:24,285 INFO L225 Difference]: With dead ends: 138 [2022-03-18 00:47:24,285 INFO L226 Difference]: Without dead ends: 129 [2022-03-18 00:47:24,287 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-18 00:47:24,287 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:24,288 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 39 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:24,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-18 00:47:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-18 00:47:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-03-18 00:47:24,298 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 125 [2022-03-18 00:47:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:24,299 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-03-18 00:47:24,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 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) [2022-03-18 00:47:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-03-18 00:47:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 00:47:24,299 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:24,299 INFO L500 BasicCegarLoop]: trace histogram [58, 56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:24,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-18 00:47:24,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113,SelfDestructingSolverStorable114 [2022-03-18 00:47:24,514 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:24,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:24,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1191132049, now seen corresponding path program 113 times [2022-03-18 00:47:24,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:24,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [210164241] [2022-03-18 00:47:24,620 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:24,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2135116144, now seen corresponding path program 1 times [2022-03-18 00:47:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:24,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124422137] [2022-03-18 00:47:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:24,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:24,622 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:24,624 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:24,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1191132049, now seen corresponding path program 114 times [2022-03-18 00:47:24,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:24,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405506481] [2022-03-18 00:47:24,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:24,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:25,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 171 proven. 3192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:25,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:25,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405506481] [2022-03-18 00:47:25,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405506481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:25,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783034133] [2022-03-18 00:47:25,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:47:25,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:25,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:25,701 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:25,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-18 00:47:25,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:47:25,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:25,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:47:25,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2022-03-18 00:47:26,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2022-03-18 00:47:26,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783034133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:26,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:26,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 8, 8] total 70 [2022-03-18 00:47:26,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:26,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [210164241] [2022-03-18 00:47:26,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [210164241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:26,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:26,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-18 00:47:26,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090996555] [2022-03-18 00:47:26,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:26,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-18 00:47:26,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:26,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-18 00:47:26,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1753, Invalid=3077, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 00:47:26,335 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 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) [2022-03-18 00:47:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:27,798 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2022-03-18 00:47:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-18 00:47:27,799 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 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 127 [2022-03-18 00:47:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:27,799 INFO L225 Difference]: With dead ends: 140 [2022-03-18 00:47:27,799 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 00:47:27,801 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2459 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5173, Invalid=10829, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 00:47:27,801 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:27,801 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 39 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 00:47:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-18 00:47:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:27,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-03-18 00:47:27,805 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 127 [2022-03-18 00:47:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:27,805 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-03-18 00:47:27,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 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) [2022-03-18 00:47:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-03-18 00:47:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-18 00:47:27,806 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:27,806 INFO L500 BasicCegarLoop]: trace histogram [59, 57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:27,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-18 00:47:28,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115,SelfDestructingSolverStorable116 [2022-03-18 00:47:28,015 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash -582304146, now seen corresponding path program 115 times [2022-03-18 00:47:28,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:28,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815766406] [2022-03-18 00:47:28,227 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2076010800, now seen corresponding path program 1 times [2022-03-18 00:47:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:28,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046227129] [2022-03-18 00:47:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:28,230 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:28,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash -582304146, now seen corresponding path program 116 times [2022-03-18 00:47:28,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:28,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721922260] [2022-03-18 00:47:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:28,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:28,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 174 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:28,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:28,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721922260] [2022-03-18 00:47:28,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721922260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:28,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879941177] [2022-03-18 00:47:28,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:47:28,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:28,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:28,878 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:28,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-18 00:47:28,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:47:28,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:28,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 00:47:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 174 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:29,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 174 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:32,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879941177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:32,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:32,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-18 00:47:32,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:32,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815766406] [2022-03-18 00:47:32,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815766406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:32,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:32,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-18 00:47:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13044778] [2022-03-18 00:47:32,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:32,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-18 00:47:32,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:32,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-18 00:47:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-03-18 00:47:32,177 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 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) [2022-03-18 00:47:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:33,220 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2022-03-18 00:47:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 00:47:33,221 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 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 129 [2022-03-18 00:47:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:33,221 INFO L225 Difference]: With dead ends: 142 [2022-03-18 00:47:33,222 INFO L226 Difference]: Without dead ends: 133 [2022-03-18 00:47:33,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-03-18 00:47:33,239 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:33,239 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:33,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-18 00:47:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-18 00:47:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-03-18 00:47:33,244 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 129 [2022-03-18 00:47:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:33,244 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-03-18 00:47:33,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 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) [2022-03-18 00:47:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-03-18 00:47:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 00:47:33,245 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:33,245 INFO L500 BasicCegarLoop]: trace histogram [60, 58, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:33,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-18 00:47:33,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117,SelfDestructingSolverStorable118 [2022-03-18 00:47:33,445 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:33,446 INFO L85 PathProgramCache]: Analyzing trace with hash 247528971, now seen corresponding path program 117 times [2022-03-18 00:47:33,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:33,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [305886790] [2022-03-18 00:47:33,586 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:33,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2016905456, now seen corresponding path program 1 times [2022-03-18 00:47:33,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:33,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191258316] [2022-03-18 00:47:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:33,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:33,589 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:33,591 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:33,591 INFO L85 PathProgramCache]: Analyzing trace with hash 247528971, now seen corresponding path program 118 times [2022-03-18 00:47:33,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:33,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663265322] [2022-03-18 00:47:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:33,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:34,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 177 proven. 3422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:34,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:34,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663265322] [2022-03-18 00:47:34,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663265322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:34,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771473799] [2022-03-18 00:47:34,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:47:34,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:34,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:34,225 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:34,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-18 00:47:34,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:47:34,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:34,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-18 00:47:34,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 177 proven. 3422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:34,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 177 proven. 3422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:37,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771473799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:37,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:37,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-18 00:47:37,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:37,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [305886790] [2022-03-18 00:47:37,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [305886790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:37,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:37,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-18 00:47:37,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535935733] [2022-03-18 00:47:37,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:37,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-18 00:47:37,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-18 00:47:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-18 00:47:37,143 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 states have internal predecessors, (127), 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) [2022-03-18 00:47:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:38,604 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2022-03-18 00:47:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-18 00:47:38,604 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 states have internal predecessors, (127), 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 131 [2022-03-18 00:47:38,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:38,605 INFO L225 Difference]: With dead ends: 144 [2022-03-18 00:47:38,605 INFO L226 Difference]: Without dead ends: 135 [2022-03-18 00:47:38,607 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-18 00:47:38,607 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:38,607 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 39 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-18 00:47:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-03-18 00:47:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-03-18 00:47:38,612 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 131 [2022-03-18 00:47:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:38,612 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-03-18 00:47:38,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 states have internal predecessors, (127), 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) [2022-03-18 00:47:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-03-18 00:47:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-18 00:47:38,613 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:38,613 INFO L500 BasicCegarLoop]: trace histogram [61, 59, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:38,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-18 00:47:38,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-18 00:47:38,823 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:38,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:38,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1146762648, now seen corresponding path program 119 times [2022-03-18 00:47:38,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:38,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [657166890] [2022-03-18 00:47:38,954 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1957800112, now seen corresponding path program 1 times [2022-03-18 00:47:38,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:38,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203425339] [2022-03-18 00:47:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:38,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:38,957 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:38,958 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:38,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1146762648, now seen corresponding path program 120 times [2022-03-18 00:47:38,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:38,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273595950] [2022-03-18 00:47:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:38,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:39,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 180 proven. 3540 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:39,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:39,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273595950] [2022-03-18 00:47:39,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273595950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:39,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19908043] [2022-03-18 00:47:39,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:47:39,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:39,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:39,795 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:39,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-18 00:47:39,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:47:39,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:47:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-03-18 00:47:40,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-03-18 00:47:40,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19908043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:40,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:40,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 8, 8] total 73 [2022-03-18 00:47:40,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:40,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [657166890] [2022-03-18 00:47:40,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [657166890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:40,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:40,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-18 00:47:40,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845005840] [2022-03-18 00:47:40,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:40,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 00:47:40,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:40,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 00:47:40,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1933, Invalid=3323, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 00:47:40,168 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 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) [2022-03-18 00:47:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:41,226 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2022-03-18 00:47:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 00:47:41,226 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 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 133 [2022-03-18 00:47:41,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:41,227 INFO L225 Difference]: With dead ends: 146 [2022-03-18 00:47:41,227 INFO L226 Difference]: Without dead ends: 137 [2022-03-18 00:47:41,228 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5713, Invalid=11843, Unknown=0, NotChecked=0, Total=17556 [2022-03-18 00:47:41,228 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:41,229 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 54 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-18 00:47:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-18 00:47:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-03-18 00:47:41,234 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 133 [2022-03-18 00:47:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:41,234 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-03-18 00:47:41,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 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) [2022-03-18 00:47:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-03-18 00:47:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 00:47:41,236 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:41,236 INFO L500 BasicCegarLoop]: trace histogram [62, 60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:41,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-18 00:47:41,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,SelfDestructingSolverStorable122,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:41,452 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1031212155, now seen corresponding path program 121 times [2022-03-18 00:47:41,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:41,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1644010139] [2022-03-18 00:47:41,580 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:41,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1898694768, now seen corresponding path program 1 times [2022-03-18 00:47:41,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:41,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697240506] [2022-03-18 00:47:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:41,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:41,586 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:41,588 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:41,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1031212155, now seen corresponding path program 122 times [2022-03-18 00:47:41,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:41,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494952185] [2022-03-18 00:47:41,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:41,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:42,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 183 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:42,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:42,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494952185] [2022-03-18 00:47:42,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494952185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:42,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729873289] [2022-03-18 00:47:42,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:47:42,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:42,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:42,437 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:42,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-18 00:47:42,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:47:42,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-18 00:47:42,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 183 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:42,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 183 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:45,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729873289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:45,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:45,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-18 00:47:45,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1644010139] [2022-03-18 00:47:45,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1644010139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:45,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:45,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-18 00:47:45,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037150946] [2022-03-18 00:47:45,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:45,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-18 00:47:45,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:45,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-18 00:47:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-03-18 00:47:45,552 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 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) [2022-03-18 00:47:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:46,591 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2022-03-18 00:47:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-18 00:47:46,593 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 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 135 [2022-03-18 00:47:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:46,593 INFO L225 Difference]: With dead ends: 148 [2022-03-18 00:47:46,593 INFO L226 Difference]: Without dead ends: 139 [2022-03-18 00:47:46,596 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-03-18 00:47:46,596 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:46,600 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 49 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-18 00:47:46,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-18 00:47:46,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-03-18 00:47:46,605 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 135 [2022-03-18 00:47:46,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:46,605 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-03-18 00:47:46,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 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) [2022-03-18 00:47:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-03-18 00:47:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 00:47:46,609 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:46,609 INFO L500 BasicCegarLoop]: trace histogram [63, 61, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:46,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-18 00:47:46,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123,SelfDestructingSolverStorable124 [2022-03-18 00:47:46,825 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:46,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1656338078, now seen corresponding path program 123 times [2022-03-18 00:47:46,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:46,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [718919302] [2022-03-18 00:47:46,934 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1839589424, now seen corresponding path program 1 times [2022-03-18 00:47:46,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:46,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835593111] [2022-03-18 00:47:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:46,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:46,937 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:46,941 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:46,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1656338078, now seen corresponding path program 124 times [2022-03-18 00:47:46,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:46,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753530436] [2022-03-18 00:47:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:46,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:47,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 186 proven. 3782 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:47,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753530436] [2022-03-18 00:47:47,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753530436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868203613] [2022-03-18 00:47:47,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:47:47,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:47,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:47,648 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:47,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-18 00:47:47,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:47:47,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:47,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 00:47:47,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 186 proven. 3782 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:47,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 186 proven. 3782 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:51,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868203613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:51,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:51,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-18 00:47:51,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:51,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [718919302] [2022-03-18 00:47:51,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [718919302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:51,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:51,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-18 00:47:51,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143006053] [2022-03-18 00:47:51,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:51,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-18 00:47:51,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-18 00:47:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-18 00:47:51,522 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 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) [2022-03-18 00:47:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:52,491 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2022-03-18 00:47:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 00:47:52,491 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 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 137 [2022-03-18 00:47:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:52,492 INFO L225 Difference]: With dead ends: 150 [2022-03-18 00:47:52,492 INFO L226 Difference]: Without dead ends: 141 [2022-03-18 00:47:52,493 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-18 00:47:52,493 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:52,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 34 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-18 00:47:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-03-18 00:47:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-03-18 00:47:52,498 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 137 [2022-03-18 00:47:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:52,498 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-03-18 00:47:52,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 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) [2022-03-18 00:47:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-03-18 00:47:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-18 00:47:52,499 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:52,499 INFO L500 BasicCegarLoop]: trace histogram [64, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:52,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-18 00:47:52,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126,SelfDestructingSolverStorable125 [2022-03-18 00:47:52,715 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:52,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:52,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1106928641, now seen corresponding path program 125 times [2022-03-18 00:47:52,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:52,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1342502072] [2022-03-18 00:47:52,865 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:52,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1780484080, now seen corresponding path program 1 times [2022-03-18 00:47:52,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:52,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722819614] [2022-03-18 00:47:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:52,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:52,871 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:52,873 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:52,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1106928641, now seen corresponding path program 126 times [2022-03-18 00:47:52,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:52,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915896329] [2022-03-18 00:47:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:52,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:54,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 189 proven. 3906 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:54,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:54,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915896329] [2022-03-18 00:47:54,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915896329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:54,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653715994] [2022-03-18 00:47:54,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:47:54,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:54,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:54,185 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:54,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-18 00:47:54,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:47:54,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:54,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:47:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-03-18 00:47:54,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:47:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-03-18 00:47:54,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653715994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:47:54,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:47:54,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 8, 8] total 76 [2022-03-18 00:47:54,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:54,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1342502072] [2022-03-18 00:47:54,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1342502072] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:54,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:54,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-18 00:47:54,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583873680] [2022-03-18 00:47:54,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:54,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-18 00:47:54,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:54,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-18 00:47:54,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2122, Invalid=3578, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 00:47:54,882 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 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) [2022-03-18 00:47:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:56,378 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2022-03-18 00:47:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-18 00:47:56,378 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 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 139 [2022-03-18 00:47:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:56,378 INFO L225 Difference]: With dead ends: 152 [2022-03-18 00:47:56,378 INFO L226 Difference]: Without dead ends: 143 [2022-03-18 00:47:56,379 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6280, Invalid=12902, Unknown=0, NotChecked=0, Total=19182 [2022-03-18 00:47:56,379 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:56,379 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 34 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:47:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-18 00:47:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-03-18 00:47:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:47:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-03-18 00:47:56,384 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 139 [2022-03-18 00:47:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:56,384 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-03-18 00:47:56,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 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) [2022-03-18 00:47:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-03-18 00:47:56,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-18 00:47:56,385 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:56,385 INFO L500 BasicCegarLoop]: trace histogram [65, 63, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:56,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-18 00:47:56,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127,SelfDestructingSolverStorable128 [2022-03-18 00:47:56,601 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:56,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1405437092, now seen corresponding path program 127 times [2022-03-18 00:47:56,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:56,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1531191104] [2022-03-18 00:47:56,773 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:47:56,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1721378736, now seen corresponding path program 1 times [2022-03-18 00:47:56,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:56,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957829865] [2022-03-18 00:47:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:56,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:56,775 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:47:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:47:56,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:47:56,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1405437092, now seen corresponding path program 128 times [2022-03-18 00:47:56,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:56,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656030652] [2022-03-18 00:47:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:56,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:58,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:58,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:58,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656030652] [2022-03-18 00:47:58,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656030652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:47:58,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131181183] [2022-03-18 00:47:58,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:47:58,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:47:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:47:58,010 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:47:58,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-18 00:47:58,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:47:58,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:47:58,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 00:47:58,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:47:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:47:58,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:00,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131181183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:00,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:00,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-18 00:48:00,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:00,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1531191104] [2022-03-18 00:48:00,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1531191104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:00,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:00,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-18 00:48:00,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297631492] [2022-03-18 00:48:00,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:00,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 00:48:00,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:00,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 00:48:00,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-03-18 00:48:00,957 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 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) [2022-03-18 00:48:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:01,979 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2022-03-18 00:48:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 00:48:01,979 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 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 141 [2022-03-18 00:48:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:01,979 INFO L225 Difference]: With dead ends: 154 [2022-03-18 00:48:01,979 INFO L226 Difference]: Without dead ends: 145 [2022-03-18 00:48:01,982 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-03-18 00:48:01,982 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:01,982 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 29 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:48:01,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-18 00:48:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-18 00:48:01,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-03-18 00:48:01,992 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 141 [2022-03-18 00:48:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:01,992 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-03-18 00:48:01,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 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) [2022-03-18 00:48:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-03-18 00:48:01,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-18 00:48:01,992 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:01,992 INFO L500 BasicCegarLoop]: trace histogram [66, 64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:02,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:02,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,SelfDestructingSolverStorable129,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:02,208 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash -509249671, now seen corresponding path program 129 times [2022-03-18 00:48:02,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:02,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1980230512] [2022-03-18 00:48:02,396 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:02,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1662273392, now seen corresponding path program 1 times [2022-03-18 00:48:02,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:02,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393298925] [2022-03-18 00:48:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:02,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:02,399 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:02,401 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:02,403 INFO L85 PathProgramCache]: Analyzing trace with hash -509249671, now seen corresponding path program 130 times [2022-03-18 00:48:02,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:02,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654249621] [2022-03-18 00:48:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:02,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:03,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 195 proven. 4160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:03,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654249621] [2022-03-18 00:48:03,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654249621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065365618] [2022-03-18 00:48:03,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:48:03,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:03,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:03,227 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:48:03,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-18 00:48:03,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:48:03,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:03,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-18 00:48:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 195 proven. 4160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:03,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 195 proven. 4160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:05,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065365618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:05,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:05,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-18 00:48:05,810 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:05,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1980230512] [2022-03-18 00:48:05,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1980230512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:05,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:05,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-18 00:48:05,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356579164] [2022-03-18 00:48:05,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:05,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-18 00:48:05,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:05,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-18 00:48:05,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-18 00:48:05,813 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 states have internal predecessors, (139), 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) [2022-03-18 00:48:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:07,009 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2022-03-18 00:48:07,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 00:48:07,010 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 states have internal predecessors, (139), 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 143 [2022-03-18 00:48:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:07,023 INFO L225 Difference]: With dead ends: 156 [2022-03-18 00:48:07,023 INFO L226 Difference]: Without dead ends: 147 [2022-03-18 00:48:07,025 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-18 00:48:07,025 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:07,025 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 44 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:48:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-18 00:48:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-18 00:48:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.028169014084507) internal successors, (146), 142 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-03-18 00:48:07,030 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 143 [2022-03-18 00:48:07,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:07,030 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-03-18 00:48:07,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 states have internal predecessors, (139), 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) [2022-03-18 00:48:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-03-18 00:48:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-18 00:48:07,031 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:07,031 INFO L500 BasicCegarLoop]: trace histogram [67, 65, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:07,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:07,245 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131,SelfDestructingSolverStorable132 [2022-03-18 00:48:07,246 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1733402710, now seen corresponding path program 131 times [2022-03-18 00:48:07,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:07,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1801456531] [2022-03-18 00:48:07,374 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:07,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1603168048, now seen corresponding path program 1 times [2022-03-18 00:48:07,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:07,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253857754] [2022-03-18 00:48:07,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:07,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:07,376 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:07,386 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1733402710, now seen corresponding path program 132 times [2022-03-18 00:48:07,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:07,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49843492] [2022-03-18 00:48:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:07,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:08,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 198 proven. 4290 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:08,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:08,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49843492] [2022-03-18 00:48:08,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49843492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:08,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14828536] [2022-03-18 00:48:08,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:48:08,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:08,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:08,205 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:48:08,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-18 00:48:08,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:48:08,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:08,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:48:08,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-18 00:48:08,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-18 00:48:08,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14828536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:08,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:08,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 8, 8] total 79 [2022-03-18 00:48:08,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1801456531] [2022-03-18 00:48:08,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1801456531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:08,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:08,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-18 00:48:08,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552301190] [2022-03-18 00:48:08,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:08,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-18 00:48:08,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:08,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-18 00:48:08,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2320, Invalid=3842, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 00:48:08,691 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 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) [2022-03-18 00:48:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:09,873 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2022-03-18 00:48:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 00:48:09,873 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 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 145 [2022-03-18 00:48:09,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:09,874 INFO L225 Difference]: With dead ends: 158 [2022-03-18 00:48:09,874 INFO L226 Difference]: Without dead ends: 149 [2022-03-18 00:48:09,875 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3143 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6874, Invalid=14006, Unknown=0, NotChecked=0, Total=20880 [2022-03-18 00:48:09,875 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:09,875 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 44 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:48:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-18 00:48:09,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-03-18 00:48:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-03-18 00:48:09,880 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 145 [2022-03-18 00:48:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:09,880 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-03-18 00:48:09,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 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) [2022-03-18 00:48:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-03-18 00:48:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-18 00:48:09,881 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:09,881 INFO L500 BasicCegarLoop]: trace histogram [68, 66, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:09,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:10,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133,SelfDestructingSolverStorable134 [2022-03-18 00:48:10,098 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:10,098 INFO L85 PathProgramCache]: Analyzing trace with hash 848758259, now seen corresponding path program 133 times [2022-03-18 00:48:10,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:10,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2037661661] [2022-03-18 00:48:10,247 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:10,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1544062704, now seen corresponding path program 1 times [2022-03-18 00:48:10,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:10,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544080865] [2022-03-18 00:48:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:10,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:10,250 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:10,253 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:10,253 INFO L85 PathProgramCache]: Analyzing trace with hash 848758259, now seen corresponding path program 134 times [2022-03-18 00:48:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:10,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106478251] [2022-03-18 00:48:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:10,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:11,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:11,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:11,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106478251] [2022-03-18 00:48:11,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106478251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:11,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913804192] [2022-03-18 00:48:11,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:48:11,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:11,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:11,654 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:48:11,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-18 00:48:11,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:48:11,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:11,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-18 00:48:11,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:11,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:15,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913804192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:15,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:15,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-18 00:48:15,208 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:15,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2037661661] [2022-03-18 00:48:15,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2037661661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:15,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:15,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-18 00:48:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112234067] [2022-03-18 00:48:15,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:15,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 00:48:15,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:15,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 00:48:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-03-18 00:48:15,211 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 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) [2022-03-18 00:48:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:16,387 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2022-03-18 00:48:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-18 00:48:16,387 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 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 147 [2022-03-18 00:48:16,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:16,388 INFO L225 Difference]: With dead ends: 160 [2022-03-18 00:48:16,388 INFO L226 Difference]: Without dead ends: 151 [2022-03-18 00:48:16,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-03-18 00:48:16,389 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:16,390 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 49 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:48:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-18 00:48:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-18 00:48:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-03-18 00:48:16,395 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 147 [2022-03-18 00:48:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:16,395 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-03-18 00:48:16,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 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) [2022-03-18 00:48:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-03-18 00:48:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 00:48:16,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:16,396 INFO L500 BasicCegarLoop]: trace histogram [69, 67, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:16,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:16,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135,SelfDestructingSolverStorable136 [2022-03-18 00:48:16,610 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1108965456, now seen corresponding path program 135 times [2022-03-18 00:48:16,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:16,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045458944] [2022-03-18 00:48:16,770 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:16,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1484957360, now seen corresponding path program 1 times [2022-03-18 00:48:16,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:16,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278654] [2022-03-18 00:48:16,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:16,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:16,772 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:16,774 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:16,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1108965456, now seen corresponding path program 136 times [2022-03-18 00:48:16,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:16,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450197576] [2022-03-18 00:48:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:16,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:18,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:18,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:18,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450197576] [2022-03-18 00:48:18,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450197576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:18,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864709896] [2022-03-18 00:48:18,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:48:18,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:18,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:18,049 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:48:18,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-18 00:48:18,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:48:18,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:18,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 00:48:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:18,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:21,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864709896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:21,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:21,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-18 00:48:21,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:21,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045458944] [2022-03-18 00:48:21,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045458944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:21,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:21,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-18 00:48:21,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099200011] [2022-03-18 00:48:21,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:21,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-18 00:48:21,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:21,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-18 00:48:21,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 00:48:21,914 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 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) [2022-03-18 00:48:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:23,471 INFO L93 Difference]: Finished difference Result 162 states and 168 transitions. [2022-03-18 00:48:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 00:48:23,472 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 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 149 [2022-03-18 00:48:23,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:23,474 INFO L225 Difference]: With dead ends: 162 [2022-03-18 00:48:23,474 INFO L226 Difference]: Without dead ends: 153 [2022-03-18 00:48:23,475 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-03-18 00:48:23,475 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:23,475 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 54 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:48:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-18 00:48:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-18 00:48:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2022-03-18 00:48:23,483 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 149 [2022-03-18 00:48:23,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:23,483 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2022-03-18 00:48:23,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 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) [2022-03-18 00:48:23,483 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2022-03-18 00:48:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-18 00:48:23,483 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:23,483 INFO L500 BasicCegarLoop]: trace histogram [70, 68, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:23,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:23,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137,SelfDestructingSolverStorable138 [2022-03-18 00:48:23,699 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2059978605, now seen corresponding path program 137 times [2022-03-18 00:48:23,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:23,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1564923172] [2022-03-18 00:48:23,921 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1425852016, now seen corresponding path program 1 times [2022-03-18 00:48:23,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:23,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461243098] [2022-03-18 00:48:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:23,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:23,923 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:23,925 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2059978605, now seen corresponding path program 138 times [2022-03-18 00:48:23,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:23,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146864116] [2022-03-18 00:48:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:23,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:24,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 207 proven. 4692 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:24,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:24,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146864116] [2022-03-18 00:48:24,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146864116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:24,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972210074] [2022-03-18 00:48:24,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:48:24,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:24,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:24,789 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:48:24,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-18 00:48:24,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:48:24,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:24,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:48:24,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2022-03-18 00:48:25,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2022-03-18 00:48:25,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972210074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:25,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:25,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 8, 8] total 82 [2022-03-18 00:48:25,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:25,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1564923172] [2022-03-18 00:48:25,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1564923172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:25,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:25,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-18 00:48:25,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645434104] [2022-03-18 00:48:25,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:25,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-18 00:48:25,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:25,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-18 00:48:25,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2527, Invalid=4115, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 00:48:25,537 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 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) [2022-03-18 00:48:26,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:26,791 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2022-03-18 00:48:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-18 00:48:26,791 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 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 151 [2022-03-18 00:48:26,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:26,791 INFO L225 Difference]: With dead ends: 164 [2022-03-18 00:48:26,791 INFO L226 Difference]: Without dead ends: 155 [2022-03-18 00:48:26,793 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7495, Invalid=15155, Unknown=0, NotChecked=0, Total=22650 [2022-03-18 00:48:26,793 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:26,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 49 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:48:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-18 00:48:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-18 00:48:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-03-18 00:48:26,798 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 151 [2022-03-18 00:48:26,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:26,798 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-03-18 00:48:26,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 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) [2022-03-18 00:48:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-03-18 00:48:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-18 00:48:26,799 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:26,799 INFO L500 BasicCegarLoop]: trace histogram [71, 69, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:26,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-18 00:48:27,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,SelfDestructingSolverStorable139,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:27,015 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1155580746, now seen corresponding path program 139 times [2022-03-18 00:48:27,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:27,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1183970032] [2022-03-18 00:48:27,214 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:27,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1366746672, now seen corresponding path program 1 times [2022-03-18 00:48:27,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:27,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554676921] [2022-03-18 00:48:27,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:27,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:27,217 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:27,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:27,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1155580746, now seen corresponding path program 140 times [2022-03-18 00:48:27,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:27,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073492530] [2022-03-18 00:48:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:27,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:28,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 210 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:28,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073492530] [2022-03-18 00:48:28,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073492530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407667883] [2022-03-18 00:48:28,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:48:28,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:28,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:28,186 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:48:28,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-18 00:48:28,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:48:28,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:28,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 00:48:28,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 210 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:28,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 210 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:30,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407667883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:30,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:30,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-03-18 00:48:30,973 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:30,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1183970032] [2022-03-18 00:48:30,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1183970032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:30,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:30,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-18 00:48:30,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235014311] [2022-03-18 00:48:30,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:30,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-18 00:48:30,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:30,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-18 00:48:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-03-18 00:48:30,975 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 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) [2022-03-18 00:48:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:32,201 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2022-03-18 00:48:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 00:48:32,201 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 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 153 [2022-03-18 00:48:32,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:32,206 INFO L225 Difference]: With dead ends: 166 [2022-03-18 00:48:32,206 INFO L226 Difference]: Without dead ends: 157 [2022-03-18 00:48:32,208 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-03-18 00:48:32,209 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:32,209 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 29 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:48:32,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-18 00:48:32,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-03-18 00:48:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 152 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:32,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-03-18 00:48:32,214 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 153 [2022-03-18 00:48:32,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:32,214 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-03-18 00:48:32,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 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) [2022-03-18 00:48:32,214 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-03-18 00:48:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-18 00:48:32,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:32,215 INFO L500 BasicCegarLoop]: trace histogram [72, 70, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:32,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:32,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,SelfDestructingSolverStorable142,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:32,431 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:32,431 INFO L85 PathProgramCache]: Analyzing trace with hash -387367961, now seen corresponding path program 141 times [2022-03-18 00:48:32,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:32,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289912573] [2022-03-18 00:48:32,657 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1307641328, now seen corresponding path program 1 times [2022-03-18 00:48:32,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:32,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896506116] [2022-03-18 00:48:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:32,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:32,660 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:32,661 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:32,661 INFO L85 PathProgramCache]: Analyzing trace with hash -387367961, now seen corresponding path program 142 times [2022-03-18 00:48:32,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:32,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890122705] [2022-03-18 00:48:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:32,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:33,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 213 proven. 4970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:33,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:33,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890122705] [2022-03-18 00:48:33,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890122705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:33,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321069787] [2022-03-18 00:48:33,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:48:33,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:33,596 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:48:33,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-18 00:48:33,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:48:33,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:33,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-18 00:48:33,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 213 proven. 4970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:33,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 213 proven. 4970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:37,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321069787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:37,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:37,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-18 00:48:37,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289912573] [2022-03-18 00:48:37,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289912573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:37,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:37,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-18 00:48:37,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422324973] [2022-03-18 00:48:37,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:37,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-18 00:48:37,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-18 00:48:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-03-18 00:48:37,065 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 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) [2022-03-18 00:48:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:38,333 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2022-03-18 00:48:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-18 00:48:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 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 155 [2022-03-18 00:48:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:38,334 INFO L225 Difference]: With dead ends: 168 [2022-03-18 00:48:38,334 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 00:48:38,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-03-18 00:48:38,337 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:38,337 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 34 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:48:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 00:48:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-03-18 00:48:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.025974025974026) internal successors, (158), 154 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:38,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2022-03-18 00:48:38,342 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 155 [2022-03-18 00:48:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:38,343 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2022-03-18 00:48:38,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 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) [2022-03-18 00:48:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2022-03-18 00:48:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-18 00:48:38,343 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:38,343 INFO L500 BasicCegarLoop]: trace histogram [73, 71, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:38,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:38,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-18 00:48:38,560 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:38,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1397358268, now seen corresponding path program 143 times [2022-03-18 00:48:38,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:38,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [728314458] [2022-03-18 00:48:38,766 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:38,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1248535984, now seen corresponding path program 1 times [2022-03-18 00:48:38,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:38,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222021700] [2022-03-18 00:48:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:38,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:38,768 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:38,770 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1397358268, now seen corresponding path program 144 times [2022-03-18 00:48:38,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:38,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595042765] [2022-03-18 00:48:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:38,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:39,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 216 proven. 5112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:39,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:39,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595042765] [2022-03-18 00:48:39,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595042765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:39,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876689718] [2022-03-18 00:48:39,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:48:39,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:39,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:39,963 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:48:39,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-18 00:48:39,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:48:39,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:39,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:48:39,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2022-03-18 00:48:40,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2022-03-18 00:48:40,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876689718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:40,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:40,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 8, 8] total 85 [2022-03-18 00:48:40,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:40,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [728314458] [2022-03-18 00:48:40,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [728314458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:40,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:40,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-18 00:48:40,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731902123] [2022-03-18 00:48:40,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:40,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-18 00:48:40,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:40,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-18 00:48:40,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2743, Invalid=4397, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 00:48:40,661 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 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) [2022-03-18 00:48:42,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:42,930 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2022-03-18 00:48:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 00:48:42,930 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 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 157 [2022-03-18 00:48:42,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:42,931 INFO L225 Difference]: With dead ends: 170 [2022-03-18 00:48:42,931 INFO L226 Difference]: Without dead ends: 161 [2022-03-18 00:48:42,932 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3644 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8143, Invalid=16349, Unknown=0, NotChecked=0, Total=24492 [2022-03-18 00:48:42,932 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:42,932 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 44 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:48:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-18 00:48:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-03-18 00:48:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2022-03-18 00:48:42,938 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 157 [2022-03-18 00:48:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:42,938 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2022-03-18 00:48:42,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 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) [2022-03-18 00:48:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2022-03-18 00:48:42,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-18 00:48:42,940 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:42,940 INFO L500 BasicCegarLoop]: trace histogram [74, 72, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:42,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:43,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145,SelfDestructingSolverStorable146 [2022-03-18 00:48:43,141 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1335434399, now seen corresponding path program 145 times [2022-03-18 00:48:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:43,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [101325023] [2022-03-18 00:48:43,308 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:43,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1189430640, now seen corresponding path program 1 times [2022-03-18 00:48:43,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:43,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508807794] [2022-03-18 00:48:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:43,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:43,310 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:43,312 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:43,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1335434399, now seen corresponding path program 146 times [2022-03-18 00:48:43,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:43,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437219462] [2022-03-18 00:48:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:43,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:44,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 219 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:44,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:44,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437219462] [2022-03-18 00:48:44,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437219462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:44,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815033172] [2022-03-18 00:48:44,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:48:44,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:44,576 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:48:44,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-18 00:48:44,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:48:44,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-18 00:48:44,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 219 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:44,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 219 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:47,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815033172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:47,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:47,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-03-18 00:48:47,599 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [101325023] [2022-03-18 00:48:47,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [101325023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:47,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:47,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-18 00:48:47,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422124311] [2022-03-18 00:48:47,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:47,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-18 00:48:47,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:47,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-18 00:48:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-03-18 00:48:47,602 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 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) [2022-03-18 00:48:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:48,981 INFO L93 Difference]: Finished difference Result 172 states and 178 transitions. [2022-03-18 00:48:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-18 00:48:48,982 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 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 159 [2022-03-18 00:48:48,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:48,982 INFO L225 Difference]: With dead ends: 172 [2022-03-18 00:48:48,982 INFO L226 Difference]: Without dead ends: 163 [2022-03-18 00:48:48,986 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-03-18 00:48:48,986 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:48,986 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 54 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:48:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-18 00:48:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-03-18 00:48:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:48,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-03-18 00:48:48,992 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 159 [2022-03-18 00:48:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:48,992 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-03-18 00:48:48,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 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) [2022-03-18 00:48:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-03-18 00:48:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-18 00:48:48,993 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:48,993 INFO L500 BasicCegarLoop]: trace histogram [75, 73, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:49,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:49,205 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-18 00:48:49,205 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:49,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1956138434, now seen corresponding path program 147 times [2022-03-18 00:48:49,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:49,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [992189639] [2022-03-18 00:48:49,359 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1130325296, now seen corresponding path program 1 times [2022-03-18 00:48:49,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:49,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245651233] [2022-03-18 00:48:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:49,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:49,383 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:49,387 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1956138434, now seen corresponding path program 148 times [2022-03-18 00:48:49,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:49,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51878351] [2022-03-18 00:48:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:49,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:50,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 222 proven. 5402 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:50,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:50,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51878351] [2022-03-18 00:48:50,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51878351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:50,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127647518] [2022-03-18 00:48:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:48:50,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:50,892 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:48:50,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-18 00:48:50,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:48:50,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 00:48:50,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 222 proven. 5402 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:51,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 222 proven. 5402 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:54,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127647518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:54,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:54,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-18 00:48:54,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:54,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [992189639] [2022-03-18 00:48:54,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [992189639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:54,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:54,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-18 00:48:54,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320183034] [2022-03-18 00:48:54,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:54,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-18 00:48:54,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:54,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-18 00:48:54,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-03-18 00:48:54,077 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 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) [2022-03-18 00:48:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:55,448 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2022-03-18 00:48:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-18 00:48:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 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 161 [2022-03-18 00:48:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:55,449 INFO L225 Difference]: With dead ends: 174 [2022-03-18 00:48:55,449 INFO L226 Difference]: Without dead ends: 165 [2022-03-18 00:48:55,452 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-03-18 00:48:55,452 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:55,452 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 54 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:48:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-18 00:48:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-03-18 00:48:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-03-18 00:48:55,458 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 161 [2022-03-18 00:48:55,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:55,458 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-03-18 00:48:55,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 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) [2022-03-18 00:48:55,459 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-03-18 00:48:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-18 00:48:55,473 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:55,473 INFO L500 BasicCegarLoop]: trace histogram [76, 74, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:55,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:55,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,SelfDestructingSolverStorable149,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:55,673 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:55,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1452261925, now seen corresponding path program 149 times [2022-03-18 00:48:55,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:55,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1266815111] [2022-03-18 00:48:55,825 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:55,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1071219952, now seen corresponding path program 1 times [2022-03-18 00:48:55,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:55,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334815677] [2022-03-18 00:48:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:55,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:55,828 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:55,830 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:55,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1452261925, now seen corresponding path program 150 times [2022-03-18 00:48:55,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:55,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471538234] [2022-03-18 00:48:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:55,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:56,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 225 proven. 5550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:48:56,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:56,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471538234] [2022-03-18 00:48:56,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471538234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:56,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654985099] [2022-03-18 00:48:56,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:48:56,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:56,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:56,876 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:48:56,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-18 00:48:56,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:48:56,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:56,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:48:56,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2022-03-18 00:48:57,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2022-03-18 00:48:57,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654985099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:57,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:57,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 8, 8] total 88 [2022-03-18 00:48:57,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:57,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1266815111] [2022-03-18 00:48:57,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1266815111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:57,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:57,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-18 00:48:57,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098947098] [2022-03-18 00:48:57,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:57,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-18 00:48:57,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-18 00:48:57,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2968, Invalid=4688, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 00:48:57,349 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 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) [2022-03-18 00:48:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:58,838 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2022-03-18 00:48:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-18 00:48:58,838 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 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 163 [2022-03-18 00:48:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:58,845 INFO L225 Difference]: With dead ends: 176 [2022-03-18 00:48:58,845 INFO L226 Difference]: Without dead ends: 167 [2022-03-18 00:48:58,847 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8818, Invalid=17588, Unknown=0, NotChecked=0, Total=26406 [2022-03-18 00:48:58,848 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:58,848 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 34 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:48:58,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-18 00:48:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-03-18 00:48:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 162 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:48:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2022-03-18 00:48:58,860 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 163 [2022-03-18 00:48:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:58,860 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2022-03-18 00:48:58,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 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) [2022-03-18 00:48:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2022-03-18 00:48:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-18 00:48:58,861 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:58,861 INFO L500 BasicCegarLoop]: trace histogram [77, 75, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:58,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:59,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable152 [2022-03-18 00:48:59,070 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1736726072, now seen corresponding path program 151 times [2022-03-18 00:48:59,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:59,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1698445738] [2022-03-18 00:48:59,251 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:48:59,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1012114608, now seen corresponding path program 1 times [2022-03-18 00:48:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:59,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186224688] [2022-03-18 00:48:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:59,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:59,253 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:48:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:48:59,256 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:48:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1736726072, now seen corresponding path program 152 times [2022-03-18 00:48:59,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:59,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226515573] [2022-03-18 00:48:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:59,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:00,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 228 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:00,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:00,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226515573] [2022-03-18 00:49:00,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226515573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:00,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646458994] [2022-03-18 00:49:00,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:49:00,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:00,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:00,348 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:49:00,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-18 00:49:00,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:49:00,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:00,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 00:49:00,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 228 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:00,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 228 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:03,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646458994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:03,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:03,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-03-18 00:49:03,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:03,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1698445738] [2022-03-18 00:49:03,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1698445738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:03,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:03,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-18 00:49:03,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631550431] [2022-03-18 00:49:03,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:03,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-18 00:49:03,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:03,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-18 00:49:03,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-03-18 00:49:03,703 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 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) [2022-03-18 00:49:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:05,124 INFO L93 Difference]: Finished difference Result 178 states and 184 transitions. [2022-03-18 00:49:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-18 00:49:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 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 165 [2022-03-18 00:49:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:05,125 INFO L225 Difference]: With dead ends: 178 [2022-03-18 00:49:05,125 INFO L226 Difference]: Without dead ends: 169 [2022-03-18 00:49:05,129 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-03-18 00:49:05,129 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:05,129 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 54 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:49:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-18 00:49:05,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-03-18 00:49:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:49:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2022-03-18 00:49:05,141 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 165 [2022-03-18 00:49:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:05,141 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2022-03-18 00:49:05,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 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) [2022-03-18 00:49:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2022-03-18 00:49:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-18 00:49:05,142 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:05,142 INFO L500 BasicCegarLoop]: trace histogram [78, 76, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:05,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-18 00:49:05,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,SelfDestructingSolverStorable154,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:05,358 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:05,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:05,358 INFO L85 PathProgramCache]: Analyzing trace with hash -252458155, now seen corresponding path program 153 times [2022-03-18 00:49:05,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:05,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1471417236] [2022-03-18 00:49:05,492 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:49:05,493 INFO L85 PathProgramCache]: Analyzing trace with hash -953009264, now seen corresponding path program 1 times [2022-03-18 00:49:05,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:05,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824651187] [2022-03-18 00:49:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:05,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:05,495 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:49:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:05,496 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:49:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash -252458155, now seen corresponding path program 154 times [2022-03-18 00:49:05,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:05,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216699371] [2022-03-18 00:49:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:05,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:07,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 231 proven. 5852 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:07,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:07,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216699371] [2022-03-18 00:49:07,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216699371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:07,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140450298] [2022-03-18 00:49:07,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:49:07,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:07,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:07,147 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:49:07,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-18 00:49:07,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:49:07,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-18 00:49:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 231 proven. 5852 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:07,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 231 proven. 5852 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:10,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140450298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:10,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:10,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-18 00:49:10,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:10,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1471417236] [2022-03-18 00:49:10,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1471417236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:10,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:10,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-18 00:49:10,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625347143] [2022-03-18 00:49:10,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:10,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 00:49:10,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:10,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 00:49:10,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-03-18 00:49:10,509 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 states have internal predecessors, (163), 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) [2022-03-18 00:49:11,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:11,972 INFO L93 Difference]: Finished difference Result 180 states and 186 transitions. [2022-03-18 00:49:11,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-18 00:49:11,972 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 states have internal predecessors, (163), 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 167 [2022-03-18 00:49:11,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:11,973 INFO L225 Difference]: With dead ends: 180 [2022-03-18 00:49:11,973 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 00:49:11,977 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-03-18 00:49:11,977 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:11,977 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 29 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:49:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 00:49:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-03-18 00:49:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 166 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:49:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2022-03-18 00:49:11,983 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 167 [2022-03-18 00:49:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:11,983 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2022-03-18 00:49:11,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 states have internal predecessors, (163), 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) [2022-03-18 00:49:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2022-03-18 00:49:11,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-18 00:49:11,984 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:11,984 INFO L500 BasicCegarLoop]: trace histogram [79, 77, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:12,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-18 00:49:12,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-18 00:49:12,201 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:12,202 INFO L85 PathProgramCache]: Analyzing trace with hash -598053582, now seen corresponding path program 155 times [2022-03-18 00:49:12,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:12,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [493918443] [2022-03-18 00:49:12,464 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:49:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash -893903920, now seen corresponding path program 1 times [2022-03-18 00:49:12,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:12,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665198089] [2022-03-18 00:49:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:12,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:12,467 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:49:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:12,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:49:12,468 INFO L85 PathProgramCache]: Analyzing trace with hash -598053582, now seen corresponding path program 156 times [2022-03-18 00:49:12,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:12,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213930465] [2022-03-18 00:49:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:12,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:14,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 234 proven. 6006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:14,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:14,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213930465] [2022-03-18 00:49:14,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213930465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:14,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546912288] [2022-03-18 00:49:14,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:49:14,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:14,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:14,382 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:49:14,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-18 00:49:14,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:49:14,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:14,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:49:14,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2022-03-18 00:49:14,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2022-03-18 00:49:14,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546912288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:14,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:14,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 8, 8] total 91 [2022-03-18 00:49:14,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:14,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [493918443] [2022-03-18 00:49:14,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [493918443] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:14,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:14,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-18 00:49:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71559136] [2022-03-18 00:49:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:14,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-18 00:49:14,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-18 00:49:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3202, Invalid=4988, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 00:49:14,970 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 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) [2022-03-18 00:49:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:16,547 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2022-03-18 00:49:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-18 00:49:16,559 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 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 169 [2022-03-18 00:49:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:16,560 INFO L225 Difference]: With dead ends: 182 [2022-03-18 00:49:16,560 INFO L226 Difference]: Without dead ends: 173 [2022-03-18 00:49:16,561 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 329 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4181 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9520, Invalid=18872, Unknown=0, NotChecked=0, Total=28392 [2022-03-18 00:49:16,561 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:16,561 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 39 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:49:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-18 00:49:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-18 00:49:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0238095238095237) internal successors, (172), 168 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:49:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2022-03-18 00:49:16,576 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 169 [2022-03-18 00:49:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:16,576 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2022-03-18 00:49:16,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 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) [2022-03-18 00:49:16,577 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2022-03-18 00:49:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-18 00:49:16,577 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:16,577 INFO L500 BasicCegarLoop]: trace histogram [80, 78, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:16,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-18 00:49:16,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,SelfDestructingSolverStorable158,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:16,778 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2002777137, now seen corresponding path program 157 times [2022-03-18 00:49:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:16,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289722551] [2022-03-18 00:49:16,949 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:49:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash -834798576, now seen corresponding path program 1 times [2022-03-18 00:49:16,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222289039] [2022-03-18 00:49:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:16,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:16,951 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:49:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:16,952 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:49:16,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2002777137, now seen corresponding path program 158 times [2022-03-18 00:49:16,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:16,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617105268] [2022-03-18 00:49:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:16,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:18,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 237 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:18,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617105268] [2022-03-18 00:49:18,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617105268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055392612] [2022-03-18 00:49:18,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:49:18,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:18,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:18,719 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:49:18,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-18 00:49:18,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:49:18,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:18,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-18 00:49:18,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 237 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:18,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 237 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:23,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055392612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:23,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:23,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-03-18 00:49:23,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:23,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289722551] [2022-03-18 00:49:23,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289722551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:23,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:23,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-18 00:49:23,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671020010] [2022-03-18 00:49:23,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:23,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-18 00:49:23,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-18 00:49:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-03-18 00:49:23,720 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 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) [2022-03-18 00:49:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:25,512 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2022-03-18 00:49:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 00:49:25,512 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 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 171 [2022-03-18 00:49:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:25,513 INFO L225 Difference]: With dead ends: 184 [2022-03-18 00:49:25,513 INFO L226 Difference]: Without dead ends: 175 [2022-03-18 00:49:25,516 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-03-18 00:49:25,516 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:25,516 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 44 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:49:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-18 00:49:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-03-18 00:49:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:49:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-03-18 00:49:25,549 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 171 [2022-03-18 00:49:25,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:25,549 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-03-18 00:49:25,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 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) [2022-03-18 00:49:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-03-18 00:49:25,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-18 00:49:25,549 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:25,549 INFO L500 BasicCegarLoop]: trace histogram [81, 79, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:25,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-18 00:49:25,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160,SelfDestructingSolverStorable159 [2022-03-18 00:49:25,750 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash 972584748, now seen corresponding path program 159 times [2022-03-18 00:49:25,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:25,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [277901576] [2022-03-18 00:49:25,901 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:49:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash -775693232, now seen corresponding path program 1 times [2022-03-18 00:49:25,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:25,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683223463] [2022-03-18 00:49:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:25,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:25,904 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:49:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:25,907 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:49:25,907 INFO L85 PathProgramCache]: Analyzing trace with hash 972584748, now seen corresponding path program 160 times [2022-03-18 00:49:25,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:25,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199920065] [2022-03-18 00:49:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:25,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:27,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 240 proven. 6320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:27,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:27,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199920065] [2022-03-18 00:49:27,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199920065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:27,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244062316] [2022-03-18 00:49:27,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:49:27,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:27,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:27,191 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:49:27,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-18 00:49:27,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:49:27,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:27,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-18 00:49:27,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 240 proven. 6320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:27,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 240 proven. 6320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:32,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244062316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:32,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:32,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-18 00:49:32,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:32,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [277901576] [2022-03-18 00:49:32,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [277901576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:32,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:32,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-18 00:49:32,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877578323] [2022-03-18 00:49:32,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:32,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-18 00:49:32,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:32,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-18 00:49:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-03-18 00:49:32,709 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 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) [2022-03-18 00:49:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:34,476 INFO L93 Difference]: Finished difference Result 186 states and 192 transitions. [2022-03-18 00:49:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-18 00:49:34,476 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 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 173 [2022-03-18 00:49:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:34,477 INFO L225 Difference]: With dead ends: 186 [2022-03-18 00:49:34,477 INFO L226 Difference]: Without dead ends: 177 [2022-03-18 00:49:34,480 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-03-18 00:49:34,481 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:34,481 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 49 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:49:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-18 00:49:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-03-18 00:49:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:49:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2022-03-18 00:49:34,487 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 173 [2022-03-18 00:49:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:34,487 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2022-03-18 00:49:34,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 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) [2022-03-18 00:49:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2022-03-18 00:49:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-18 00:49:34,488 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:34,488 INFO L500 BasicCegarLoop]: trace histogram [82, 80, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:34,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-18 00:49:34,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-03-18 00:49:34,702 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:34,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:34,702 INFO L85 PathProgramCache]: Analyzing trace with hash -152862903, now seen corresponding path program 161 times [2022-03-18 00:49:34,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:34,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [331402109] [2022-03-18 00:49:34,846 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:49:34,846 INFO L85 PathProgramCache]: Analyzing trace with hash -716587888, now seen corresponding path program 1 times [2022-03-18 00:49:34,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:34,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431982052] [2022-03-18 00:49:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:34,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:34,852 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:49:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:34,854 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:49:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash -152862903, now seen corresponding path program 162 times [2022-03-18 00:49:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:34,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185752500] [2022-03-18 00:49:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:34,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:36,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 243 proven. 6480 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:36,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:36,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185752500] [2022-03-18 00:49:36,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185752500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:36,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596287375] [2022-03-18 00:49:36,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:49:36,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:36,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:36,091 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:49:36,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-18 00:49:36,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:49:36,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:36,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:49:36,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2022-03-18 00:49:36,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2022-03-18 00:49:36,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596287375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:36,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:36,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 8, 8] total 94 [2022-03-18 00:49:36,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:36,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [331402109] [2022-03-18 00:49:36,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [331402109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:36,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:36,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-18 00:49:36,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207257571] [2022-03-18 00:49:36,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:36,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-18 00:49:36,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:36,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-18 00:49:36,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3445, Invalid=5297, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 00:49:36,598 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 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) [2022-03-18 00:49:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:38,284 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2022-03-18 00:49:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 00:49:38,284 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 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 175 [2022-03-18 00:49:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:38,284 INFO L225 Difference]: With dead ends: 188 [2022-03-18 00:49:38,285 INFO L226 Difference]: Without dead ends: 179 [2022-03-18 00:49:38,286 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4463 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=10249, Invalid=20201, Unknown=0, NotChecked=0, Total=30450 [2022-03-18 00:49:38,286 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:38,286 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 44 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:49:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-18 00:49:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-03-18 00:49:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:49:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2022-03-18 00:49:38,292 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 175 [2022-03-18 00:49:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:38,292 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2022-03-18 00:49:38,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 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) [2022-03-18 00:49:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2022-03-18 00:49:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-18 00:49:38,293 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:38,293 INFO L500 BasicCegarLoop]: trace histogram [83, 81, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:38,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-18 00:49:38,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,SelfDestructingSolverStorable164,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:38,509 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:38,509 INFO L85 PathProgramCache]: Analyzing trace with hash 623703078, now seen corresponding path program 163 times [2022-03-18 00:49:38,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:38,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2005454193] [2022-03-18 00:49:38,630 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:49:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash -657482544, now seen corresponding path program 1 times [2022-03-18 00:49:38,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:38,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920653419] [2022-03-18 00:49:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:38,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:38,633 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:49:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:38,635 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:49:38,635 INFO L85 PathProgramCache]: Analyzing trace with hash 623703078, now seen corresponding path program 164 times [2022-03-18 00:49:38,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:38,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869853981] [2022-03-18 00:49:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:38,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:40,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 246 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:40,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869853981] [2022-03-18 00:49:40,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869853981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553699985] [2022-03-18 00:49:40,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:49:40,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:40,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:40,767 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:49:40,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-18 00:49:40,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:49:40,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:40,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 00:49:40,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 246 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:41,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 246 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:44,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553699985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:44,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:44,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-03-18 00:49:44,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:44,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2005454193] [2022-03-18 00:49:44,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2005454193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:44,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:44,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-18 00:49:44,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57197808] [2022-03-18 00:49:44,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:44,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-18 00:49:44,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:44,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-18 00:49:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-03-18 00:49:44,863 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 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) [2022-03-18 00:49:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:46,503 INFO L93 Difference]: Finished difference Result 190 states and 196 transitions. [2022-03-18 00:49:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-18 00:49:46,503 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 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 177 [2022-03-18 00:49:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:46,504 INFO L225 Difference]: With dead ends: 190 [2022-03-18 00:49:46,504 INFO L226 Difference]: Without dead ends: 181 [2022-03-18 00:49:46,507 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-03-18 00:49:46,508 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:46,508 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 39 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:49:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-18 00:49:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-03-18 00:49:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 176 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:49:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-03-18 00:49:46,514 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 177 [2022-03-18 00:49:46,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:46,515 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-03-18 00:49:46,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 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) [2022-03-18 00:49:46,515 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-03-18 00:49:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-18 00:49:46,515 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:46,515 INFO L500 BasicCegarLoop]: trace histogram [84, 82, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:46,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-18 00:49:46,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165,SelfDestructingSolverStorable166 [2022-03-18 00:49:46,731 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash -420698685, now seen corresponding path program 165 times [2022-03-18 00:49:46,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:46,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [924644518] [2022-03-18 00:49:46,849 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:49:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash -598377200, now seen corresponding path program 1 times [2022-03-18 00:49:46,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:46,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536951523] [2022-03-18 00:49:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:46,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:46,852 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:49:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:46,853 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:49:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash -420698685, now seen corresponding path program 166 times [2022-03-18 00:49:46,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:46,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961954384] [2022-03-18 00:49:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:46,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:48,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 249 proven. 6806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:48,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:48,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961954384] [2022-03-18 00:49:48,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961954384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:48,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012906215] [2022-03-18 00:49:48,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:49:48,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:48,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:48,280 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:49:48,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-18 00:49:48,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:49:48,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-18 00:49:48,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 249 proven. 6806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:48,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 249 proven. 6806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:53,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012906215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:53,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:53,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-18 00:49:53,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:53,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [924644518] [2022-03-18 00:49:53,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [924644518] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:53,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:53,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-18 00:49:53,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396616344] [2022-03-18 00:49:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:53,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-18 00:49:53,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:53,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-18 00:49:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-03-18 00:49:53,653 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 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) [2022-03-18 00:49:55,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:55,790 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2022-03-18 00:49:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-18 00:49:55,790 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 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 179 [2022-03-18 00:49:55,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:55,793 INFO L225 Difference]: With dead ends: 192 [2022-03-18 00:49:55,793 INFO L226 Difference]: Without dead ends: 183 [2022-03-18 00:49:55,796 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-03-18 00:49:55,796 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:55,796 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 29 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:49:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-18 00:49:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-03-18 00:49:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:49:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-03-18 00:49:55,807 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 179 [2022-03-18 00:49:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:55,807 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-03-18 00:49:55,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 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) [2022-03-18 00:49:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-03-18 00:49:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-18 00:49:55,807 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:55,808 INFO L500 BasicCegarLoop]: trace histogram [85, 83, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:55,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-18 00:49:56,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,SelfDestructingSolverStorable168,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:56,019 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash 931554336, now seen corresponding path program 167 times [2022-03-18 00:49:56,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:56,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412862022] [2022-03-18 00:49:56,251 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:49:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash -539271856, now seen corresponding path program 1 times [2022-03-18 00:49:56,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:56,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725881297] [2022-03-18 00:49:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:56,254 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:49:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:49:56,255 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:49:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash 931554336, now seen corresponding path program 168 times [2022-03-18 00:49:56,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:56,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400369750] [2022-03-18 00:49:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:56,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:57,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 252 proven. 6972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:49:57,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:57,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400369750] [2022-03-18 00:49:57,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400369750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:57,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723459849] [2022-03-18 00:49:57,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:49:57,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:57,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:57,601 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:49:57,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-18 00:49:57,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:49:57,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:57,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:49:57,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2022-03-18 00:49:57,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2022-03-18 00:49:58,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723459849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:58,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:58,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 8, 8] total 97 [2022-03-18 00:49:58,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:58,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412862022] [2022-03-18 00:49:58,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412862022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:58,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:58,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-18 00:49:58,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9176954] [2022-03-18 00:49:58,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:58,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-18 00:49:58,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:58,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-18 00:49:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3697, Invalid=5615, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 00:49:58,102 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 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) [2022-03-18 00:49:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:59,900 INFO L93 Difference]: Finished difference Result 194 states and 200 transitions. [2022-03-18 00:49:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-18 00:49:59,901 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 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 181 [2022-03-18 00:49:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:59,901 INFO L225 Difference]: With dead ends: 194 [2022-03-18 00:49:59,901 INFO L226 Difference]: Without dead ends: 185 [2022-03-18 00:49:59,904 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4754 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=11005, Invalid=21575, Unknown=0, NotChecked=0, Total=32580 [2022-03-18 00:49:59,904 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:59,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 54 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:49:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-18 00:49:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-03-18 00:49:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:49:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2022-03-18 00:49:59,910 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 181 [2022-03-18 00:49:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:59,910 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2022-03-18 00:49:59,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 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) [2022-03-18 00:49:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2022-03-18 00:49:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-18 00:49:59,920 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:59,920 INFO L500 BasicCegarLoop]: trace histogram [86, 84, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:59,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-18 00:50:00,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-18 00:50:00,135 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:00,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:00,136 INFO L85 PathProgramCache]: Analyzing trace with hash -928383171, now seen corresponding path program 169 times [2022-03-18 00:50:00,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:00,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [715987938] [2022-03-18 00:50:00,326 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:50:00,326 INFO L85 PathProgramCache]: Analyzing trace with hash -480166512, now seen corresponding path program 1 times [2022-03-18 00:50:00,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:00,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054216746] [2022-03-18 00:50:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:00,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:00,329 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:50:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:00,330 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:50:00,330 INFO L85 PathProgramCache]: Analyzing trace with hash -928383171, now seen corresponding path program 170 times [2022-03-18 00:50:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:00,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429870872] [2022-03-18 00:50:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:00,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:02,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 255 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:02,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:02,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429870872] [2022-03-18 00:50:02,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429870872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:02,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828934151] [2022-03-18 00:50:02,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:50:02,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:02,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:02,060 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:50:02,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-18 00:50:02,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:50:02,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:02,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-18 00:50:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 255 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:02,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 255 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:06,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828934151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:06,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:06,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-03-18 00:50:06,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:06,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [715987938] [2022-03-18 00:50:06,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [715987938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:06,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:06,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-18 00:50:06,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985245042] [2022-03-18 00:50:06,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:06,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-18 00:50:06,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:06,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-18 00:50:06,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-03-18 00:50:06,092 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 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) [2022-03-18 00:50:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:07,854 INFO L93 Difference]: Finished difference Result 196 states and 202 transitions. [2022-03-18 00:50:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-18 00:50:07,854 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 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 183 [2022-03-18 00:50:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:07,855 INFO L225 Difference]: With dead ends: 196 [2022-03-18 00:50:07,855 INFO L226 Difference]: Without dead ends: 187 [2022-03-18 00:50:07,859 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-03-18 00:50:07,859 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:07,860 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 34 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:50:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-18 00:50:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-03-18 00:50:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.021978021978022) internal successors, (186), 182 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:50:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2022-03-18 00:50:07,866 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 183 [2022-03-18 00:50:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:07,866 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2022-03-18 00:50:07,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 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) [2022-03-18 00:50:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2022-03-18 00:50:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-18 00:50:07,866 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:07,867 INFO L500 BasicCegarLoop]: trace histogram [87, 85, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:07,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-18 00:50:08,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,SelfDestructingSolverStorable172,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:08,084 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1621932262, now seen corresponding path program 171 times [2022-03-18 00:50:08,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:08,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1575817406] [2022-03-18 00:50:08,276 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:50:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash -421061168, now seen corresponding path program 1 times [2022-03-18 00:50:08,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:08,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115244100] [2022-03-18 00:50:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:08,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:08,279 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:50:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:08,281 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:50:08,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1621932262, now seen corresponding path program 172 times [2022-03-18 00:50:08,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:08,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776307190] [2022-03-18 00:50:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:08,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:09,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 258 proven. 7310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:09,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:09,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776307190] [2022-03-18 00:50:09,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776307190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:09,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507590707] [2022-03-18 00:50:09,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:50:09,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:09,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:09,667 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:50:09,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-18 00:50:09,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:50:09,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:09,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 00:50:09,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 258 proven. 7310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:09,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 258 proven. 7310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:14,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507590707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:14,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:14,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-18 00:50:14,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:14,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1575817406] [2022-03-18 00:50:14,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1575817406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:14,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:14,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-18 00:50:14,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897060812] [2022-03-18 00:50:14,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:14,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-18 00:50:14,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:14,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-18 00:50:14,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-03-18 00:50:14,015 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 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) [2022-03-18 00:50:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:15,796 INFO L93 Difference]: Finished difference Result 198 states and 204 transitions. [2022-03-18 00:50:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-18 00:50:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 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 185 [2022-03-18 00:50:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:15,797 INFO L225 Difference]: With dead ends: 198 [2022-03-18 00:50:15,797 INFO L226 Difference]: Without dead ends: 189 [2022-03-18 00:50:15,800 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-03-18 00:50:15,800 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:15,800 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 79 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:50:15,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-18 00:50:15,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-18 00:50:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0217391304347827) internal successors, (188), 184 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:50:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2022-03-18 00:50:15,806 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 185 [2022-03-18 00:50:15,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:15,806 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2022-03-18 00:50:15,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 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) [2022-03-18 00:50:15,806 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2022-03-18 00:50:15,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-18 00:50:15,807 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:15,807 INFO L500 BasicCegarLoop]: trace histogram [88, 86, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:15,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-18 00:50:16,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,SelfDestructingSolverStorable174,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:16,023 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:16,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:16,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1892289463, now seen corresponding path program 173 times [2022-03-18 00:50:16,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:16,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [668125348] [2022-03-18 00:50:16,232 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:50:16,232 INFO L85 PathProgramCache]: Analyzing trace with hash -361955824, now seen corresponding path program 1 times [2022-03-18 00:50:16,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:16,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602779684] [2022-03-18 00:50:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:16,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:16,234 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:50:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:16,236 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:50:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1892289463, now seen corresponding path program 174 times [2022-03-18 00:50:16,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:16,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338157018] [2022-03-18 00:50:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:16,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:18,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 261 proven. 7482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:18,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:18,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338157018] [2022-03-18 00:50:18,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338157018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:18,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781499169] [2022-03-18 00:50:18,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:50:18,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:18,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:18,335 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:50:18,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-18 00:50:18,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:50:18,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:18,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:50:18,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2022-03-18 00:50:18,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2022-03-18 00:50:19,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781499169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:19,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:19,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 8, 8] total 100 [2022-03-18 00:50:19,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [668125348] [2022-03-18 00:50:19,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [668125348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:19,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:19,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-18 00:50:19,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990147669] [2022-03-18 00:50:19,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:19,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-18 00:50:19,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:19,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-18 00:50:19,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3958, Invalid=5942, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 00:50:19,054 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 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) [2022-03-18 00:50:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:20,937 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2022-03-18 00:50:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-18 00:50:20,938 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 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 187 [2022-03-18 00:50:20,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:20,938 INFO L225 Difference]: With dead ends: 200 [2022-03-18 00:50:20,938 INFO L226 Difference]: Without dead ends: 191 [2022-03-18 00:50:20,940 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5054 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11788, Invalid=22994, Unknown=0, NotChecked=0, Total=34782 [2022-03-18 00:50:20,940 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:20,941 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 39 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:50:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-18 00:50:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-18 00:50:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:50:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2022-03-18 00:50:20,946 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 187 [2022-03-18 00:50:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:20,947 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2022-03-18 00:50:20,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 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) [2022-03-18 00:50:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2022-03-18 00:50:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-18 00:50:20,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:20,947 INFO L500 BasicCegarLoop]: trace histogram [89, 87, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:20,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-18 00:50:21,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,SelfDestructingSolverStorable176,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:21,163 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1079894764, now seen corresponding path program 175 times [2022-03-18 00:50:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:21,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1031148585] [2022-03-18 00:50:21,304 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:50:21,304 INFO L85 PathProgramCache]: Analyzing trace with hash -302850480, now seen corresponding path program 1 times [2022-03-18 00:50:21,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:21,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090564363] [2022-03-18 00:50:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:21,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:21,306 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:50:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:21,308 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:50:21,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1079894764, now seen corresponding path program 176 times [2022-03-18 00:50:21,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:21,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910114675] [2022-03-18 00:50:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:23,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 264 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:23,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:23,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910114675] [2022-03-18 00:50:23,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910114675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:23,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786262326] [2022-03-18 00:50:23,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:50:23,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:23,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:23,759 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:50:23,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-18 00:50:23,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:50:23,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-18 00:50:23,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 264 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:24,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 264 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:29,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786262326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:29,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:29,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-03-18 00:50:29,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:29,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1031148585] [2022-03-18 00:50:29,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1031148585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:29,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:29,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-18 00:50:29,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271777607] [2022-03-18 00:50:29,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:29,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-18 00:50:29,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-18 00:50:29,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-03-18 00:50:29,025 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 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) [2022-03-18 00:50:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:30,901 INFO L93 Difference]: Finished difference Result 202 states and 208 transitions. [2022-03-18 00:50:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-18 00:50:30,901 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 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 189 [2022-03-18 00:50:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:30,902 INFO L225 Difference]: With dead ends: 202 [2022-03-18 00:50:30,902 INFO L226 Difference]: Without dead ends: 193 [2022-03-18 00:50:30,907 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4349 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=31686, Invalid=39870, Unknown=0, NotChecked=0, Total=71556 [2022-03-18 00:50:30,908 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:30,908 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 29 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:50:30,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-18 00:50:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-03-18 00:50:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:50:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2022-03-18 00:50:30,914 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 189 [2022-03-18 00:50:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:30,914 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2022-03-18 00:50:30,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 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) [2022-03-18 00:50:30,914 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2022-03-18 00:50:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-18 00:50:30,915 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:30,915 INFO L500 BasicCegarLoop]: trace histogram [90, 88, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:30,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-18 00:50:31,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177,SelfDestructingSolverStorable178 [2022-03-18 00:50:31,129 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1195685071, now seen corresponding path program 177 times [2022-03-18 00:50:31,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:31,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1212178268] [2022-03-18 00:50:31,276 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:50:31,276 INFO L85 PathProgramCache]: Analyzing trace with hash -243745136, now seen corresponding path program 1 times [2022-03-18 00:50:31,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895518659] [2022-03-18 00:50:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:31,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:31,278 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:50:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:31,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:50:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1195685071, now seen corresponding path program 178 times [2022-03-18 00:50:31,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:31,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027763676] [2022-03-18 00:50:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:31,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:32,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 267 proven. 7832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:32,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027763676] [2022-03-18 00:50:32,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027763676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469983914] [2022-03-18 00:50:32,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:50:32,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:32,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:32,738 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:50:32,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-18 00:50:32,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:50:32,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-18 00:50:32,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 267 proven. 7832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:33,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 267 proven. 7832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:38,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469983914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:38,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:38,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-18 00:50:38,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:38,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1212178268] [2022-03-18 00:50:38,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1212178268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:38,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:38,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-18 00:50:38,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298136302] [2022-03-18 00:50:38,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:38,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-18 00:50:38,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:38,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-18 00:50:38,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16292, Invalid=16650, Unknown=0, NotChecked=0, Total=32942 [2022-03-18 00:50:38,414 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 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) [2022-03-18 00:50:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:40,351 INFO L93 Difference]: Finished difference Result 204 states and 210 transitions. [2022-03-18 00:50:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-18 00:50:40,352 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 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 191 [2022-03-18 00:50:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:40,352 INFO L225 Difference]: With dead ends: 204 [2022-03-18 00:50:40,352 INFO L226 Difference]: Without dead ends: 195 [2022-03-18 00:50:40,356 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=32402, Invalid=40768, Unknown=0, NotChecked=0, Total=73170 [2022-03-18 00:50:40,356 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:40,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 39 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:50:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-18 00:50:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-03-18 00:50:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 190 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:50:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2022-03-18 00:50:40,362 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 191 [2022-03-18 00:50:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:40,363 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2022-03-18 00:50:40,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 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) [2022-03-18 00:50:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2022-03-18 00:50:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-18 00:50:40,363 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:40,363 INFO L500 BasicCegarLoop]: trace histogram [91, 89, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:40,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-18 00:50:40,580 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180,SelfDestructingSolverStorable179 [2022-03-18 00:50:40,580 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash -801020402, now seen corresponding path program 179 times [2022-03-18 00:50:40,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:40,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335970039] [2022-03-18 00:50:40,719 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:50:40,720 INFO L85 PathProgramCache]: Analyzing trace with hash -184639792, now seen corresponding path program 1 times [2022-03-18 00:50:40,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:40,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826349655] [2022-03-18 00:50:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:40,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:40,722 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:50:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:40,723 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:50:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash -801020402, now seen corresponding path program 180 times [2022-03-18 00:50:40,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:40,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618396255] [2022-03-18 00:50:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:40,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:42,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 270 proven. 8010 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:42,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:42,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618396255] [2022-03-18 00:50:42,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618396255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:42,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332563910] [2022-03-18 00:50:42,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:50:42,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:42,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:42,157 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:50:42,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-18 00:50:42,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:50:42,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:42,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:50:42,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2022-03-18 00:50:42,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2022-03-18 00:50:42,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332563910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:42,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:42,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 8, 8] total 103 [2022-03-18 00:50:42,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:42,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335970039] [2022-03-18 00:50:42,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335970039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:42,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:42,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-18 00:50:42,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443877966] [2022-03-18 00:50:42,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:42,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-18 00:50:42,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:42,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-18 00:50:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4228, Invalid=6278, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:50:42,692 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 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) [2022-03-18 00:50:44,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:44,750 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2022-03-18 00:50:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-18 00:50:44,751 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 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 193 [2022-03-18 00:50:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:44,751 INFO L225 Difference]: With dead ends: 206 [2022-03-18 00:50:44,751 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 00:50:44,754 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5363 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12598, Invalid=24458, Unknown=0, NotChecked=0, Total=37056 [2022-03-18 00:50:44,754 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:44,754 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 34 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:50:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 00:50:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-03-18 00:50:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 192 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:50:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2022-03-18 00:50:44,779 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 193 [2022-03-18 00:50:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:44,779 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2022-03-18 00:50:44,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 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) [2022-03-18 00:50:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2022-03-18 00:50:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-18 00:50:44,780 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:44,780 INFO L500 BasicCegarLoop]: trace histogram [92, 90, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:44,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-18 00:50:44,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,SelfDestructingSolverStorable182,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:44,997 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash 514604459, now seen corresponding path program 181 times [2022-03-18 00:50:44,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:44,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [352563236] [2022-03-18 00:50:45,150 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:50:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash -125534448, now seen corresponding path program 1 times [2022-03-18 00:50:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:45,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489672115] [2022-03-18 00:50:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:45,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:45,152 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:50:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:45,154 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:50:45,154 INFO L85 PathProgramCache]: Analyzing trace with hash 514604459, now seen corresponding path program 182 times [2022-03-18 00:50:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:45,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745336131] [2022-03-18 00:50:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:45,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:46,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 273 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:46,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:46,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745336131] [2022-03-18 00:50:46,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745336131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:46,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220480690] [2022-03-18 00:50:46,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:50:46,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:46,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:46,601 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:50:46,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-18 00:50:46,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:50:46,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-18 00:50:46,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 273 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:46,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 273 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:51,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220480690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:51,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:51,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-03-18 00:50:51,153 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:51,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [352563236] [2022-03-18 00:50:51,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [352563236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:51,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:51,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-18 00:50:51,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599552299] [2022-03-18 00:50:51,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:51,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-18 00:50:51,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-18 00:50:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17022, Invalid=17388, Unknown=0, NotChecked=0, Total=34410 [2022-03-18 00:50:51,156 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 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) [2022-03-18 00:50:53,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:53,155 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2022-03-18 00:50:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 00:50:53,155 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 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 195 [2022-03-18 00:50:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:53,156 INFO L225 Difference]: With dead ends: 208 [2022-03-18 00:50:53,156 INFO L226 Difference]: Without dead ends: 199 [2022-03-18 00:50:53,159 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4634 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=33858, Invalid=42594, Unknown=0, NotChecked=0, Total=76452 [2022-03-18 00:50:53,160 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:53,160 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 39 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:50:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-18 00:50:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-03-18 00:50:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:50:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 202 transitions. [2022-03-18 00:50:53,166 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 202 transitions. Word has length 195 [2022-03-18 00:50:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:53,167 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 202 transitions. [2022-03-18 00:50:53,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 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) [2022-03-18 00:50:53,167 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 202 transitions. [2022-03-18 00:50:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-18 00:50:53,167 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:53,167 INFO L500 BasicCegarLoop]: trace histogram [93, 91, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:53,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-18 00:50:53,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,SelfDestructingSolverStorable183,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:53,384 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2109710856, now seen corresponding path program 183 times [2022-03-18 00:50:53,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:53,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [655563449] [2022-03-18 00:50:53,536 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:50:53,536 INFO L85 PathProgramCache]: Analyzing trace with hash -66429104, now seen corresponding path program 1 times [2022-03-18 00:50:53,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:53,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622569707] [2022-03-18 00:50:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:53,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:53,538 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:50:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:50:53,539 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:50:53,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2109710856, now seen corresponding path program 184 times [2022-03-18 00:50:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:53,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828940544] [2022-03-18 00:50:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:53,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:55,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 276 proven. 8372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:55,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:55,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828940544] [2022-03-18 00:50:55,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828940544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:55,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882039495] [2022-03-18 00:50:55,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:50:55,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:55,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:55,074 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:50:55,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-18 00:50:55,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:50:55,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:55,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-18 00:50:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 276 proven. 8372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:55,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 276 proven. 8372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:50:59,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882039495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:59,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:59,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-03-18 00:50:59,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:59,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [655563449] [2022-03-18 00:50:59,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [655563449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:59,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:59,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-18 00:50:59,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421894485] [2022-03-18 00:50:59,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:59,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-18 00:50:59,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-18 00:50:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17393, Invalid=17763, Unknown=0, NotChecked=0, Total=35156 [2022-03-18 00:50:59,755 INFO L87 Difference]: Start difference. First operand 199 states and 202 transitions. Second operand has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 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) [2022-03-18 00:51:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:01,799 INFO L93 Difference]: Finished difference Result 210 states and 216 transitions. [2022-03-18 00:51:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-18 00:51:01,799 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 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 197 [2022-03-18 00:51:01,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:01,800 INFO L225 Difference]: With dead ends: 210 [2022-03-18 00:51:01,800 INFO L226 Difference]: Without dead ends: 201 [2022-03-18 00:51:01,803 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4731 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=34598, Invalid=43522, Unknown=0, NotChecked=0, Total=78120 [2022-03-18 00:51:01,803 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:01,803 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 39 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:51:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-18 00:51:01,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-03-18 00:51:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 196 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:51:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2022-03-18 00:51:01,810 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 197 [2022-03-18 00:51:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:01,810 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2022-03-18 00:51:01,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 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) [2022-03-18 00:51:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2022-03-18 00:51:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-18 00:51:01,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:01,811 INFO L500 BasicCegarLoop]: trace histogram [94, 92, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:01,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-18 00:51:02,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,SelfDestructingSolverStorable186,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:51:02,028 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1703633701, now seen corresponding path program 185 times [2022-03-18 00:51:02,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:02,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1584958751] [2022-03-18 00:51:02,260 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:51:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash -7323760, now seen corresponding path program 1 times [2022-03-18 00:51:02,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:02,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695835828] [2022-03-18 00:51:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:02,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:02,263 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:51:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:02,264 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:51:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1703633701, now seen corresponding path program 186 times [2022-03-18 00:51:02,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:02,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849016830] [2022-03-18 00:51:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:02,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:04,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 279 proven. 8556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:04,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:04,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849016830] [2022-03-18 00:51:04,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849016830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:51:04,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256109692] [2022-03-18 00:51:04,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:51:04,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:51:04,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:51:04,603 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:51:04,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-18 00:51:04,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:51:04,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:51:04,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:51:04,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:51:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2022-03-18 00:51:05,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:51:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2022-03-18 00:51:05,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256109692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:51:05,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:51:05,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 8, 8] total 106 [2022-03-18 00:51:05,566 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:51:05,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1584958751] [2022-03-18 00:51:05,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1584958751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:05,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:05,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-18 00:51:05,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821596839] [2022-03-18 00:51:05,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:51:05,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-18 00:51:05,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:05,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-18 00:51:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4507, Invalid=6623, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 00:51:05,568 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 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) [2022-03-18 00:51:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:08,670 INFO L93 Difference]: Finished difference Result 212 states and 218 transitions. [2022-03-18 00:51:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-18 00:51:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 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 199 [2022-03-18 00:51:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:08,671 INFO L225 Difference]: With dead ends: 212 [2022-03-18 00:51:08,671 INFO L226 Difference]: Without dead ends: 203 [2022-03-18 00:51:08,673 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 389 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5681 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13435, Invalid=25967, Unknown=0, NotChecked=0, Total=39402 [2022-03-18 00:51:08,673 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:08,673 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 34 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:51:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-18 00:51:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-03-18 00:51:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.02020202020202) internal successors, (202), 198 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:51:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2022-03-18 00:51:08,680 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 199 [2022-03-18 00:51:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:08,680 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2022-03-18 00:51:08,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 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) [2022-03-18 00:51:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2022-03-18 00:51:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-18 00:51:08,681 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:08,681 INFO L500 BasicCegarLoop]: trace histogram [95, 93, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:08,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-18 00:51:08,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-18 00:51:08,895 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1989455614, now seen corresponding path program 187 times [2022-03-18 00:51:08,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:08,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1968044601] [2022-03-18 00:51:09,086 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:51:09,086 INFO L85 PathProgramCache]: Analyzing trace with hash 51781584, now seen corresponding path program 1 times [2022-03-18 00:51:09,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:09,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952978581] [2022-03-18 00:51:09,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:09,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:09,088 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:51:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:09,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:51:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1989455614, now seen corresponding path program 188 times [2022-03-18 00:51:09,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:09,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747185676] [2022-03-18 00:51:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:09,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:11,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 282 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:11,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:11,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747185676] [2022-03-18 00:51:11,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747185676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:51:11,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988076073] [2022-03-18 00:51:11,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:51:11,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:51:11,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:51:11,816 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:51:11,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-18 00:51:11,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:51:11,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:51:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 00:51:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:51:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 282 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:12,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:51:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 282 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:19,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988076073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:51:19,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:51:19,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 192 [2022-03-18 00:51:19,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:51:19,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1968044601] [2022-03-18 00:51:19,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1968044601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:19,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:19,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-18 00:51:19,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50017813] [2022-03-18 00:51:19,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:51:19,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-18 00:51:19,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-18 00:51:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18147, Invalid=18525, Unknown=0, NotChecked=0, Total=36672 [2022-03-18 00:51:19,269 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 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) [2022-03-18 00:51:21,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:21,384 INFO L93 Difference]: Finished difference Result 214 states and 220 transitions. [2022-03-18 00:51:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-18 00:51:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 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 201 [2022-03-18 00:51:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:21,385 INFO L225 Difference]: With dead ends: 214 [2022-03-18 00:51:21,385 INFO L226 Difference]: Without dead ends: 205 [2022-03-18 00:51:21,388 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4928 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=36102, Invalid=45408, Unknown=0, NotChecked=0, Total=81510 [2022-03-18 00:51:21,389 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:21,389 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 49 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:51:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-18 00:51:21,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-03-18 00:51:21,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.02) internal successors, (204), 200 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:51:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-03-18 00:51:21,395 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 201 [2022-03-18 00:51:21,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:21,395 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-03-18 00:51:21,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 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) [2022-03-18 00:51:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-03-18 00:51:21,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-18 00:51:21,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:21,396 INFO L500 BasicCegarLoop]: trace histogram [96, 94, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:21,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-18 00:51:21,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190,SelfDestructingSolverStorable189 [2022-03-18 00:51:21,613 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:21,613 INFO L85 PathProgramCache]: Analyzing trace with hash 889666463, now seen corresponding path program 189 times [2022-03-18 00:51:21,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:21,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1084275766] [2022-03-18 00:51:21,725 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:51:21,725 INFO L85 PathProgramCache]: Analyzing trace with hash 110886928, now seen corresponding path program 1 times [2022-03-18 00:51:21,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:21,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194436392] [2022-03-18 00:51:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:21,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:21,728 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:51:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:21,732 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:51:21,732 INFO L85 PathProgramCache]: Analyzing trace with hash 889666463, now seen corresponding path program 190 times [2022-03-18 00:51:21,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:21,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816054603] [2022-03-18 00:51:21,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:21,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:23,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 285 proven. 8930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:23,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816054603] [2022-03-18 00:51:23,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816054603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:51:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886506030] [2022-03-18 00:51:23,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:51:23,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:51:23,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:51:23,338 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:51:23,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-18 00:51:23,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:51:23,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:51:23,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-18 00:51:23,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:51:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 285 proven. 8930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:23,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:51:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 285 proven. 8930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:28,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886506030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:51:28,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:51:28,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-03-18 00:51:28,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:51:28,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1084275766] [2022-03-18 00:51:28,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1084275766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:28,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:28,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-18 00:51:28,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002613119] [2022-03-18 00:51:28,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:51:28,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-18 00:51:28,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-18 00:51:28,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-03-18 00:51:28,916 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 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) [2022-03-18 00:51:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:31,081 INFO L93 Difference]: Finished difference Result 216 states and 222 transitions. [2022-03-18 00:51:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-18 00:51:31,081 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 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 203 [2022-03-18 00:51:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:31,082 INFO L225 Difference]: With dead ends: 216 [2022-03-18 00:51:31,082 INFO L226 Difference]: Without dead ends: 207 [2022-03-18 00:51:31,086 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5028 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=36866, Invalid=46366, Unknown=0, NotChecked=0, Total=83232 [2022-03-18 00:51:31,086 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:31,086 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 29 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:51:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-18 00:51:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-03-18 00:51:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 202 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:51:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2022-03-18 00:51:31,093 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 203 [2022-03-18 00:51:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:31,093 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2022-03-18 00:51:31,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 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) [2022-03-18 00:51:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2022-03-18 00:51:31,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-18 00:51:31,094 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:31,094 INFO L500 BasicCegarLoop]: trace histogram [97, 95, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:31,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-18 00:51:31,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191,SelfDestructingSolverStorable192 [2022-03-18 00:51:31,306 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:31,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1767043836, now seen corresponding path program 191 times [2022-03-18 00:51:31,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:31,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1698307880] [2022-03-18 00:51:31,568 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:51:31,568 INFO L85 PathProgramCache]: Analyzing trace with hash 169992272, now seen corresponding path program 1 times [2022-03-18 00:51:31,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:31,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397953928] [2022-03-18 00:51:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:31,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:31,570 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:51:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:31,573 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:51:31,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1767043836, now seen corresponding path program 192 times [2022-03-18 00:51:31,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:31,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417714858] [2022-03-18 00:51:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:31,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:33,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 288 proven. 9120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:33,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417714858] [2022-03-18 00:51:33,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417714858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:51:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302221687] [2022-03-18 00:51:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:51:33,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:51:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:51:33,216 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:51:33,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-18 00:51:33,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:51:33,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:51:33,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:51:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:51:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2022-03-18 00:51:33,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:51:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2022-03-18 00:51:33,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302221687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:51:33,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:51:33,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 8, 8] total 109 [2022-03-18 00:51:33,772 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:51:33,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1698307880] [2022-03-18 00:51:33,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1698307880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:33,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:33,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-18 00:51:33,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168680164] [2022-03-18 00:51:33,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:51:33,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-18 00:51:33,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:33,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-18 00:51:33,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4795, Invalid=6977, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 00:51:33,775 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 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) [2022-03-18 00:51:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:36,066 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2022-03-18 00:51:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-18 00:51:36,066 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 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 205 [2022-03-18 00:51:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:36,067 INFO L225 Difference]: With dead ends: 218 [2022-03-18 00:51:36,067 INFO L226 Difference]: Without dead ends: 209 [2022-03-18 00:51:36,070 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 401 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6008 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=14299, Invalid=27521, Unknown=0, NotChecked=0, Total=41820 [2022-03-18 00:51:36,070 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:36,070 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 39 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:51:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-18 00:51:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-18 00:51:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:51:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 212 transitions. [2022-03-18 00:51:36,077 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 212 transitions. Word has length 205 [2022-03-18 00:51:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:36,077 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 212 transitions. [2022-03-18 00:51:36,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 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) [2022-03-18 00:51:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 212 transitions. [2022-03-18 00:51:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-18 00:51:36,078 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:36,078 INFO L500 BasicCegarLoop]: trace histogram [98, 96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:36,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-18 00:51:36,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,SelfDestructingSolverStorable194,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:51:36,294 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:36,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:36,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1181858023, now seen corresponding path program 193 times [2022-03-18 00:51:36,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:36,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [793451297] [2022-03-18 00:51:36,459 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:51:36,459 INFO L85 PathProgramCache]: Analyzing trace with hash 229097616, now seen corresponding path program 1 times [2022-03-18 00:51:36,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:36,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845448581] [2022-03-18 00:51:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:36,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:36,462 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:51:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:36,463 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:51:36,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1181858023, now seen corresponding path program 194 times [2022-03-18 00:51:36,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:36,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140023429] [2022-03-18 00:51:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:36,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:38,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 291 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:38,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:38,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140023429] [2022-03-18 00:51:38,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140023429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:51:38,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783206952] [2022-03-18 00:51:38,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:51:38,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:51:38,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:51:38,152 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:51:38,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-18 00:51:38,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:51:38,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:51:38,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-18 00:51:38,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:51:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 291 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:38,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:51:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 291 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:43,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783206952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:51:43,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:51:43,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-03-18 00:51:43,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:51:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [793451297] [2022-03-18 00:51:43,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [793451297] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:43,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:43,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-18 00:51:43,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823714264] [2022-03-18 00:51:43,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:51:43,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-18 00:51:43,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-18 00:51:43,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19308, Invalid=19698, Unknown=0, NotChecked=0, Total=39006 [2022-03-18 00:51:43,261 INFO L87 Difference]: Start difference. First operand 209 states and 212 transitions. Second operand has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 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) [2022-03-18 00:51:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:45,524 INFO L93 Difference]: Finished difference Result 220 states and 226 transitions. [2022-03-18 00:51:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-18 00:51:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 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 207 [2022-03-18 00:51:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:45,528 INFO L225 Difference]: With dead ends: 220 [2022-03-18 00:51:45,528 INFO L226 Difference]: Without dead ends: 211 [2022-03-18 00:51:45,531 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5231 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=38418, Invalid=48312, Unknown=0, NotChecked=0, Total=86730 [2022-03-18 00:51:45,531 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:45,531 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 34 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:51:45,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-18 00:51:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-03-18 00:51:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 206 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:51:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2022-03-18 00:51:45,540 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 207 [2022-03-18 00:51:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:45,540 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2022-03-18 00:51:45,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 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) [2022-03-18 00:51:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2022-03-18 00:51:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-18 00:51:45,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:45,542 INFO L500 BasicCegarLoop]: trace histogram [99, 97, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:45,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-18 00:51:45,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,SelfDestructingSolverStorable196,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:51:45,747 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash -398129162, now seen corresponding path program 195 times [2022-03-18 00:51:45,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:45,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1761697584] [2022-03-18 00:51:45,976 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:51:45,976 INFO L85 PathProgramCache]: Analyzing trace with hash 288202960, now seen corresponding path program 1 times [2022-03-18 00:51:45,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:45,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532623420] [2022-03-18 00:51:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:45,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:45,978 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:51:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:45,980 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:51:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash -398129162, now seen corresponding path program 196 times [2022-03-18 00:51:45,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:45,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699651778] [2022-03-18 00:51:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:45,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:47,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 294 proven. 9506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:47,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:47,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699651778] [2022-03-18 00:51:47,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699651778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:51:47,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858819251] [2022-03-18 00:51:47,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:51:47,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:51:47,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:51:47,940 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:51:47,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-18 00:51:48,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:51:48,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:51:48,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-18 00:51:48,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:51:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 294 proven. 9506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:48,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:51:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 294 proven. 9506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:53,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858819251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:51:53,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:51:53,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 200 [2022-03-18 00:51:53,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:51:53,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1761697584] [2022-03-18 00:51:53,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1761697584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:53,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:53,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-18 00:51:53,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768639562] [2022-03-18 00:51:53,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:51:53,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-18 00:51:53,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:53,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-18 00:51:53,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19703, Invalid=20097, Unknown=0, NotChecked=0, Total=39800 [2022-03-18 00:51:53,142 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 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) [2022-03-18 00:51:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:55,450 INFO L93 Difference]: Finished difference Result 222 states and 228 transitions. [2022-03-18 00:51:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-18 00:51:55,450 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 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 209 [2022-03-18 00:51:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:55,451 INFO L225 Difference]: With dead ends: 222 [2022-03-18 00:51:55,451 INFO L226 Difference]: Without dead ends: 213 [2022-03-18 00:51:55,455 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5334 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=39206, Invalid=49300, Unknown=0, NotChecked=0, Total=88506 [2022-03-18 00:51:55,456 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:55,456 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 29 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:51:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-18 00:51:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-03-18 00:51:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0192307692307692) internal successors, (212), 208 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:51:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2022-03-18 00:51:55,462 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 209 [2022-03-18 00:51:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:55,463 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2022-03-18 00:51:55,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 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) [2022-03-18 00:51:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2022-03-18 00:51:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-18 00:51:55,463 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:55,463 INFO L500 BasicCegarLoop]: trace histogram [100, 98, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:55,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-18 00:51:55,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,SelfDestructingSolverStorable198,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:51:55,675 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:55,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1146029459, now seen corresponding path program 197 times [2022-03-18 00:51:55,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:55,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1675180820] [2022-03-18 00:51:55,878 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:51:55,879 INFO L85 PathProgramCache]: Analyzing trace with hash 347308304, now seen corresponding path program 1 times [2022-03-18 00:51:55,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:55,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14473080] [2022-03-18 00:51:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:55,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:55,881 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:51:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:51:55,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:51:55,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1146029459, now seen corresponding path program 198 times [2022-03-18 00:51:55,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:55,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333547246] [2022-03-18 00:51:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:55,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:58,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 297 proven. 9702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:51:58,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:58,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333547246] [2022-03-18 00:51:58,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333547246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:51:58,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173529459] [2022-03-18 00:51:58,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:51:58,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:51:58,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:51:58,135 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:51:58,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-18 00:51:58,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:51:58,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:51:58,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:51:58,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:51:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 298 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2022-03-18 00:51:58,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:51:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 298 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2022-03-18 00:51:58,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173529459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:51:58,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:51:58,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 8, 8] total 112 [2022-03-18 00:51:58,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:51:58,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1675180820] [2022-03-18 00:51:58,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1675180820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:58,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:58,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-18 00:51:58,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064320232] [2022-03-18 00:51:58,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:51:58,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-18 00:51:58,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:58,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-18 00:51:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5092, Invalid=7340, Unknown=0, NotChecked=0, Total=12432 [2022-03-18 00:51:58,930 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 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) [2022-03-18 00:52:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:52:02,437 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2022-03-18 00:52:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-18 00:52:02,437 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 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 211 [2022-03-18 00:52:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:52:02,442 INFO L225 Difference]: With dead ends: 224 [2022-03-18 00:52:02,442 INFO L226 Difference]: Without dead ends: 215 [2022-03-18 00:52:02,445 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 413 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6344 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=15190, Invalid=29120, Unknown=0, NotChecked=0, Total=44310 [2022-03-18 00:52:02,446 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:52:02,446 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 49 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:52:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-18 00:52:02,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-03-18 00:52:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.019047619047619) internal successors, (214), 210 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:52:02,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2022-03-18 00:52:02,452 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 211 [2022-03-18 00:52:02,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:52:02,452 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2022-03-18 00:52:02,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 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) [2022-03-18 00:52:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2022-03-18 00:52:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-18 00:52:02,453 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:52:02,454 INFO L500 BasicCegarLoop]: trace histogram [101, 99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:52:02,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-18 00:52:02,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,SelfDestructingSolverStorable200,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:52:02,659 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:52:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:52:02,660 INFO L85 PathProgramCache]: Analyzing trace with hash -976220176, now seen corresponding path program 199 times [2022-03-18 00:52:02,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:02,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2077460998] [2022-03-18 00:52:02,840 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:52:02,841 INFO L85 PathProgramCache]: Analyzing trace with hash 406413648, now seen corresponding path program 1 times [2022-03-18 00:52:02,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:02,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798660865] [2022-03-18 00:52:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:02,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:02,843 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:52:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:02,845 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:52:02,845 INFO L85 PathProgramCache]: Analyzing trace with hash -976220176, now seen corresponding path program 200 times [2022-03-18 00:52:02,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:02,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348954189] [2022-03-18 00:52:02,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:02,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:04,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:52:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 300 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:04,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:52:04,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348954189] [2022-03-18 00:52:04,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348954189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:52:04,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199429108] [2022-03-18 00:52:04,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:52:04,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:52:04,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:52:04,702 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:52:04,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-18 00:52:04,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:52:04,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:52:04,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-18 00:52:04,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:52:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 300 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:04,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:52:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 300 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:10,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199429108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:52:10,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:52:10,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-03-18 00:52:10,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:52:10,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2077460998] [2022-03-18 00:52:10,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2077460998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:10,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:10,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-18 00:52:10,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361459479] [2022-03-18 00:52:10,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:52:10,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-18 00:52:10,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:10,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-18 00:52:10,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2022-03-18 00:52:10,445 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 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) [2022-03-18 00:52:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:52:12,875 INFO L93 Difference]: Finished difference Result 226 states and 232 transitions. [2022-03-18 00:52:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-18 00:52:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 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 213 [2022-03-18 00:52:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:52:12,876 INFO L225 Difference]: With dead ends: 226 [2022-03-18 00:52:12,876 INFO L226 Difference]: Without dead ends: 217 [2022-03-18 00:52:12,880 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5543 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=40806, Invalid=51306, Unknown=0, NotChecked=0, Total=92112 [2022-03-18 00:52:12,880 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:52:12,880 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 49 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:52:12,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-18 00:52:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-03-18 00:52:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 212 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:52:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 220 transitions. [2022-03-18 00:52:12,887 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 220 transitions. Word has length 213 [2022-03-18 00:52:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:52:12,887 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 220 transitions. [2022-03-18 00:52:12,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 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) [2022-03-18 00:52:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 220 transitions. [2022-03-18 00:52:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-03-18 00:52:12,887 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:52:12,888 INFO L500 BasicCegarLoop]: trace histogram [102, 100, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:52:12,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-18 00:52:13,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201,SelfDestructingSolverStorable202 [2022-03-18 00:52:13,101 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:52:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:52:13,101 INFO L85 PathProgramCache]: Analyzing trace with hash -348653811, now seen corresponding path program 201 times [2022-03-18 00:52:13,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:13,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [848398530] [2022-03-18 00:52:13,247 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:52:13,247 INFO L85 PathProgramCache]: Analyzing trace with hash 465518992, now seen corresponding path program 1 times [2022-03-18 00:52:13,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:13,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473675450] [2022-03-18 00:52:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:13,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:13,255 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:52:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:13,257 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:52:13,257 INFO L85 PathProgramCache]: Analyzing trace with hash -348653811, now seen corresponding path program 202 times [2022-03-18 00:52:13,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:13,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619491872] [2022-03-18 00:52:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:13,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:15,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:52:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 303 proven. 10100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:15,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:52:15,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619491872] [2022-03-18 00:52:15,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619491872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:52:15,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126972572] [2022-03-18 00:52:15,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:52:15,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:52:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:52:15,036 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:52:15,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-18 00:52:15,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:52:15,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:52:15,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 102 conjunts are in the unsatisfiable core [2022-03-18 00:52:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:52:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 303 proven. 10100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:15,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:52:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 303 proven. 10100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:20,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126972572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:52:20,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:52:20,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 103, 103] total 206 [2022-03-18 00:52:20,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:52:20,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [848398530] [2022-03-18 00:52:20,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [848398530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:20,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:20,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-18 00:52:20,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591205469] [2022-03-18 00:52:20,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:52:20,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-18 00:52:20,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:20,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-18 00:52:20,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20912, Invalid=21318, Unknown=0, NotChecked=0, Total=42230 [2022-03-18 00:52:20,526 INFO L87 Difference]: Start difference. First operand 217 states and 220 transitions. Second operand has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 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) [2022-03-18 00:52:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:52:23,000 INFO L93 Difference]: Finished difference Result 228 states and 234 transitions. [2022-03-18 00:52:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-18 00:52:23,000 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 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 215 [2022-03-18 00:52:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:52:23,001 INFO L225 Difference]: With dead ends: 228 [2022-03-18 00:52:23,001 INFO L226 Difference]: Without dead ends: 219 [2022-03-18 00:52:23,004 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5649 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=41618, Invalid=52324, Unknown=0, NotChecked=0, Total=93942 [2022-03-18 00:52:23,004 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:52:23,004 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 49 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:52:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-18 00:52:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-03-18 00:52:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0186915887850467) internal successors, (218), 214 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:52:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2022-03-18 00:52:23,011 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 215 [2022-03-18 00:52:23,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:52:23,011 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2022-03-18 00:52:23,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 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) [2022-03-18 00:52:23,011 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2022-03-18 00:52:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-03-18 00:52:23,012 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:52:23,012 INFO L500 BasicCegarLoop]: trace histogram [103, 101, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:52:23,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-18 00:52:23,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,SelfDestructingSolverStorable204,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:52:23,229 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:52:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:52:23,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1447201514, now seen corresponding path program 203 times [2022-03-18 00:52:23,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:23,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1907666591] [2022-03-18 00:52:23,369 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:52:23,369 INFO L85 PathProgramCache]: Analyzing trace with hash 524624336, now seen corresponding path program 1 times [2022-03-18 00:52:23,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:23,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928119693] [2022-03-18 00:52:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:23,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:23,372 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:52:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:23,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:52:23,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1447201514, now seen corresponding path program 204 times [2022-03-18 00:52:23,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:23,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464788453] [2022-03-18 00:52:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:23,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:25,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:52:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 306 proven. 10302 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:25,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:52:25,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464788453] [2022-03-18 00:52:25,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464788453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:52:25,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834099334] [2022-03-18 00:52:25,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:52:25,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:52:25,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:52:25,186 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:52:25,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-18 00:52:25,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:52:25,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:52:25,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:52:25,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:52:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2022-03-18 00:52:25,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:52:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2022-03-18 00:52:25,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834099334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:52:25,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:52:25,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 8, 8] total 115 [2022-03-18 00:52:25,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:52:25,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1907666591] [2022-03-18 00:52:25,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1907666591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:25,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:25,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-18 00:52:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693295149] [2022-03-18 00:52:25,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:52:25,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-18 00:52:25,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:25,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-18 00:52:25,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5398, Invalid=7712, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 00:52:25,913 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 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) [2022-03-18 00:52:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:52:28,520 INFO L93 Difference]: Finished difference Result 230 states and 236 transitions. [2022-03-18 00:52:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-18 00:52:28,521 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 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 217 [2022-03-18 00:52:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:52:28,521 INFO L225 Difference]: With dead ends: 230 [2022-03-18 00:52:28,521 INFO L226 Difference]: Without dead ends: 221 [2022-03-18 00:52:28,524 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 425 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6689 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=16108, Invalid=30764, Unknown=0, NotChecked=0, Total=46872 [2022-03-18 00:52:28,524 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:52:28,524 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 39 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:52:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-18 00:52:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-03-18 00:52:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0185185185185186) internal successors, (220), 216 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:52:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 224 transitions. [2022-03-18 00:52:28,530 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 224 transitions. Word has length 217 [2022-03-18 00:52:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:52:28,531 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 224 transitions. [2022-03-18 00:52:28,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 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) [2022-03-18 00:52:28,531 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 224 transitions. [2022-03-18 00:52:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-18 00:52:28,531 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:52:28,531 INFO L500 BasicCegarLoop]: trace histogram [104, 102, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:52:28,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-18 00:52:28,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205,SelfDestructingSolverStorable206 [2022-03-18 00:52:28,747 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:52:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:52:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash 687315847, now seen corresponding path program 205 times [2022-03-18 00:52:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:28,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [899074538] [2022-03-18 00:52:28,926 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:52:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash 583729680, now seen corresponding path program 1 times [2022-03-18 00:52:28,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:28,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39895729] [2022-03-18 00:52:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:28,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:28,928 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:52:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:28,938 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:52:28,938 INFO L85 PathProgramCache]: Analyzing trace with hash 687315847, now seen corresponding path program 206 times [2022-03-18 00:52:28,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:28,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456869947] [2022-03-18 00:52:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:28,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:30,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:52:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 309 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:30,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:52:30,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456869947] [2022-03-18 00:52:30,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456869947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:52:30,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151239807] [2022-03-18 00:52:30,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:52:30,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:52:30,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:52:30,779 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:52:30,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-18 00:52:30,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:52:30,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:52:30,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-18 00:52:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:52:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 309 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:31,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:52:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 309 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:36,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151239807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:52:36,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:52:36,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 210 [2022-03-18 00:52:36,566 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:52:36,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [899074538] [2022-03-18 00:52:36,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [899074538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:36,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:36,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-03-18 00:52:36,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532270882] [2022-03-18 00:52:36,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:52:36,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-18 00:52:36,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:36,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-18 00:52:36,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21738, Invalid=22152, Unknown=0, NotChecked=0, Total=43890 [2022-03-18 00:52:36,569 INFO L87 Difference]: Start difference. First operand 221 states and 224 transitions. Second operand has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 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) [2022-03-18 00:52:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:52:39,111 INFO L93 Difference]: Finished difference Result 232 states and 238 transitions. [2022-03-18 00:52:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-18 00:52:39,111 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 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 219 [2022-03-18 00:52:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:52:39,112 INFO L225 Difference]: With dead ends: 232 [2022-03-18 00:52:39,112 INFO L226 Difference]: Without dead ends: 223 [2022-03-18 00:52:39,116 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=43266, Invalid=54390, Unknown=0, NotChecked=0, Total=97656 [2022-03-18 00:52:39,116 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:52:39,116 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 34 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:52:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-18 00:52:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-03-18 00:52:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.018348623853211) internal successors, (222), 218 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:52:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 226 transitions. [2022-03-18 00:52:39,123 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 226 transitions. Word has length 219 [2022-03-18 00:52:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:52:39,123 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 226 transitions. [2022-03-18 00:52:39,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 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) [2022-03-18 00:52:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 226 transitions. [2022-03-18 00:52:39,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-18 00:52:39,124 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:52:39,124 INFO L500 BasicCegarLoop]: trace histogram [105, 103, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:52:39,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-18 00:52:39,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,SelfDestructingSolverStorable208,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:52:39,341 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:52:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:52:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash 581630180, now seen corresponding path program 207 times [2022-03-18 00:52:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:39,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1803418913] [2022-03-18 00:52:39,556 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:52:39,557 INFO L85 PathProgramCache]: Analyzing trace with hash 642835024, now seen corresponding path program 1 times [2022-03-18 00:52:39,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:39,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796332323] [2022-03-18 00:52:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:39,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:39,559 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:52:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:39,560 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:52:39,560 INFO L85 PathProgramCache]: Analyzing trace with hash 581630180, now seen corresponding path program 208 times [2022-03-18 00:52:39,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:39,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447799625] [2022-03-18 00:52:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:39,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:41,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:52:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 312 proven. 10712 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:41,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:52:41,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447799625] [2022-03-18 00:52:41,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447799625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:52:41,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184425023] [2022-03-18 00:52:41,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:52:41,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:52:41,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:52:41,952 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:52:41,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-18 00:52:42,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:52:42,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:52:42,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-18 00:52:42,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:52:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 312 proven. 10712 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:42,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:52:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 312 proven. 10712 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:47,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184425023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:52:47,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:52:47,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 212 [2022-03-18 00:52:47,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:52:47,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1803418913] [2022-03-18 00:52:47,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1803418913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:47,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:47,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-18 00:52:47,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779407638] [2022-03-18 00:52:47,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:52:47,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-18 00:52:47,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-18 00:52:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2022-03-18 00:52:47,958 INFO L87 Difference]: Start difference. First operand 223 states and 226 transitions. Second operand has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 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) [2022-03-18 00:52:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:52:50,511 INFO L93 Difference]: Finished difference Result 234 states and 240 transitions. [2022-03-18 00:52:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-18 00:52:50,511 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 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 221 [2022-03-18 00:52:50,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:52:50,512 INFO L225 Difference]: With dead ends: 234 [2022-03-18 00:52:50,512 INFO L226 Difference]: Without dead ends: 225 [2022-03-18 00:52:50,515 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5973 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=44102, Invalid=55438, Unknown=0, NotChecked=0, Total=99540 [2022-03-18 00:52:50,526 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:52:50,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 39 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:52:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-18 00:52:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-03-18 00:52:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.018181818181818) internal successors, (224), 220 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:52:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2022-03-18 00:52:50,533 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 221 [2022-03-18 00:52:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:52:50,534 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2022-03-18 00:52:50,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 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) [2022-03-18 00:52:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2022-03-18 00:52:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-03-18 00:52:50,535 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:52:50,535 INFO L500 BasicCegarLoop]: trace histogram [106, 104, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:52:50,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-18 00:52:50,752 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,SelfDestructingSolverStorable210,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:52:50,753 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:52:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:52:50,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2096919297, now seen corresponding path program 209 times [2022-03-18 00:52:50,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:50,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267257909] [2022-03-18 00:52:50,897 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:52:50,897 INFO L85 PathProgramCache]: Analyzing trace with hash 701940368, now seen corresponding path program 1 times [2022-03-18 00:52:50,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:50,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084514849] [2022-03-18 00:52:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:50,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:50,899 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:52:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:50,900 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:52:50,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2096919297, now seen corresponding path program 210 times [2022-03-18 00:52:50,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:50,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929702768] [2022-03-18 00:52:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:50,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:52,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:52:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 315 proven. 10920 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:52,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:52:52,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929702768] [2022-03-18 00:52:52,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929702768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:52:52,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809081728] [2022-03-18 00:52:52,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:52:52,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:52:52,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:52:52,859 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:52:52,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-18 00:52:52,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:52:52,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:52:52,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:52:52,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:52:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 10920 trivial. 0 not checked. [2022-03-18 00:52:53,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:52:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 10920 trivial. 0 not checked. [2022-03-18 00:52:53,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809081728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:52:53,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:52:53,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 8, 8] total 118 [2022-03-18 00:52:53,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:52:53,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267257909] [2022-03-18 00:52:53,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267257909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:53,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:53,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-03-18 00:52:53,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320423855] [2022-03-18 00:52:53,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:52:53,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-18 00:52:53,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:53,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-18 00:52:53,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5713, Invalid=8093, Unknown=0, NotChecked=0, Total=13806 [2022-03-18 00:52:53,457 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 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) [2022-03-18 00:52:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:52:56,146 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2022-03-18 00:52:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-18 00:52:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 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 223 [2022-03-18 00:52:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:52:56,150 INFO L225 Difference]: With dead ends: 236 [2022-03-18 00:52:56,150 INFO L226 Difference]: Without dead ends: 227 [2022-03-18 00:52:56,154 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 437 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7043 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=17053, Invalid=32453, Unknown=0, NotChecked=0, Total=49506 [2022-03-18 00:52:56,154 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:52:56,154 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 34 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:52:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-18 00:52:56,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-18 00:52:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.018018018018018) internal successors, (226), 222 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:52:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2022-03-18 00:52:56,161 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 223 [2022-03-18 00:52:56,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:52:56,162 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2022-03-18 00:52:56,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 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) [2022-03-18 00:52:56,162 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2022-03-18 00:52:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-03-18 00:52:56,162 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:52:56,162 INFO L500 BasicCegarLoop]: trace histogram [107, 105, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:52:56,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-18 00:52:56,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211,SelfDestructingSolverStorable212 [2022-03-18 00:52:56,365 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:52:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:52:56,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1999119906, now seen corresponding path program 211 times [2022-03-18 00:52:56,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:56,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [303695328] [2022-03-18 00:52:56,601 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:52:56,602 INFO L85 PathProgramCache]: Analyzing trace with hash 761045712, now seen corresponding path program 1 times [2022-03-18 00:52:56,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:56,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050036715] [2022-03-18 00:52:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:56,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:56,605 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:52:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:52:56,606 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:52:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1999119906, now seen corresponding path program 212 times [2022-03-18 00:52:56,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:56,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920826217] [2022-03-18 00:52:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:56,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:58,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:52:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 318 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:58,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:52:58,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920826217] [2022-03-18 00:52:58,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920826217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:52:58,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639249448] [2022-03-18 00:52:58,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:52:58,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:52:58,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:52:58,572 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:52:58,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-18 00:52:58,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:52:58,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:52:58,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-18 00:52:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:52:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 318 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:52:58,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:53:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 318 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:04,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639249448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:53:04,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:53:04,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108, 108] total 216 [2022-03-18 00:53:04,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:53:04,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [303695328] [2022-03-18 00:53:04,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [303695328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:04,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:04,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-18 00:53:04,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103300148] [2022-03-18 00:53:04,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:53:04,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-18 00:53:04,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:04,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-18 00:53:04,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23007, Invalid=23433, Unknown=0, NotChecked=0, Total=46440 [2022-03-18 00:53:04,595 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 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) [2022-03-18 00:53:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:53:07,477 INFO L93 Difference]: Finished difference Result 238 states and 244 transitions. [2022-03-18 00:53:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-18 00:53:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 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 225 [2022-03-18 00:53:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:53:07,478 INFO L225 Difference]: With dead ends: 238 [2022-03-18 00:53:07,478 INFO L226 Difference]: Without dead ends: 229 [2022-03-18 00:53:07,484 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6194 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=45798, Invalid=57564, Unknown=0, NotChecked=0, Total=103362 [2022-03-18 00:53:07,485 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:53:07,485 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 44 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:53:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-18 00:53:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-03-18 00:53:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0178571428571428) internal successors, (228), 224 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:53:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 232 transitions. [2022-03-18 00:53:07,492 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 232 transitions. Word has length 225 [2022-03-18 00:53:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:53:07,492 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 232 transitions. [2022-03-18 00:53:07,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 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) [2022-03-18 00:53:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 232 transitions. [2022-03-18 00:53:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-03-18 00:53:07,493 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:53:07,493 INFO L500 BasicCegarLoop]: trace histogram [108, 106, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:53:07,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-18 00:53:07,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214,SelfDestructingSolverStorable213 [2022-03-18 00:53:07,738 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:53:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:53:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash 192216443, now seen corresponding path program 213 times [2022-03-18 00:53:07,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:07,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1902092198] [2022-03-18 00:53:07,887 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:53:07,888 INFO L85 PathProgramCache]: Analyzing trace with hash 820151056, now seen corresponding path program 1 times [2022-03-18 00:53:07,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:07,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581313861] [2022-03-18 00:53:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:07,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:53:07,890 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:53:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:53:07,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:53:07,891 INFO L85 PathProgramCache]: Analyzing trace with hash 192216443, now seen corresponding path program 214 times [2022-03-18 00:53:07,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:07,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168943650] [2022-03-18 00:53:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:07,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:09,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:53:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 321 proven. 11342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:09,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:53:09,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168943650] [2022-03-18 00:53:09,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168943650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:53:09,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690701735] [2022-03-18 00:53:09,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:53:09,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:53:09,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:53:09,886 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:53:09,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-18 00:53:09,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:53:09,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:53:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-18 00:53:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:53:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 321 proven. 11342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:10,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:53:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 321 proven. 11342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:18,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690701735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:53:18,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:53:18,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 109, 109] total 218 [2022-03-18 00:53:18,889 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:53:18,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1902092198] [2022-03-18 00:53:18,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1902092198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:18,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:18,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-03-18 00:53:18,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650424463] [2022-03-18 00:53:18,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:53:18,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-18 00:53:18,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:18,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-18 00:53:18,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23438, Invalid=23868, Unknown=0, NotChecked=0, Total=47306 [2022-03-18 00:53:18,894 INFO L87 Difference]: Start difference. First operand 229 states and 232 transitions. Second operand has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 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) [2022-03-18 00:53:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:53:21,609 INFO L93 Difference]: Finished difference Result 240 states and 246 transitions. [2022-03-18 00:53:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-18 00:53:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 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 227 [2022-03-18 00:53:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:53:21,610 INFO L225 Difference]: With dead ends: 240 [2022-03-18 00:53:21,610 INFO L226 Difference]: Without dead ends: 231 [2022-03-18 00:53:21,613 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6306 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=46658, Invalid=58642, Unknown=0, NotChecked=0, Total=105300 [2022-03-18 00:53:21,613 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:53:21,613 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 59 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:53:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-18 00:53:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-03-18 00:53:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 226 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:53:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 234 transitions. [2022-03-18 00:53:21,620 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 234 transitions. Word has length 227 [2022-03-18 00:53:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:53:21,620 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 234 transitions. [2022-03-18 00:53:21,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 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) [2022-03-18 00:53:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 234 transitions. [2022-03-18 00:53:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-03-18 00:53:21,621 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:53:21,621 INFO L500 BasicCegarLoop]: trace histogram [109, 107, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:53:21,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-18 00:53:21,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,SelfDestructingSolverStorable216,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:53:21,838 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:53:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:53:21,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1532472792, now seen corresponding path program 215 times [2022-03-18 00:53:21,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:21,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1349216880] [2022-03-18 00:53:22,069 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:53:22,069 INFO L85 PathProgramCache]: Analyzing trace with hash 879256400, now seen corresponding path program 1 times [2022-03-18 00:53:22,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:22,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163361609] [2022-03-18 00:53:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:22,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:53:22,071 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:53:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:53:22,072 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:53:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1532472792, now seen corresponding path program 216 times [2022-03-18 00:53:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:22,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060563611] [2022-03-18 00:53:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:22,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:24,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:53:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 324 proven. 11556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:24,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:53:24,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060563611] [2022-03-18 00:53:24,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060563611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:53:24,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705939098] [2022-03-18 00:53:24,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:53:24,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:53:24,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:53:24,567 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:53:24,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-18 00:53:24,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:53:24,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:53:24,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:53:24,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:53:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 11556 trivial. 0 not checked. [2022-03-18 00:53:25,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:53:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 11556 trivial. 0 not checked. [2022-03-18 00:53:25,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705939098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:53:25,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:53:25,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 8, 8] total 121 [2022-03-18 00:53:25,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:53:25,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1349216880] [2022-03-18 00:53:25,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1349216880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:25,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:25,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-03-18 00:53:25,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421472688] [2022-03-18 00:53:25,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:53:25,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-18 00:53:25,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:25,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-18 00:53:25,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6037, Invalid=8483, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 00:53:25,514 INFO L87 Difference]: Start difference. First operand 231 states and 234 transitions. Second operand has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 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) [2022-03-18 00:53:30,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:53:30,183 INFO L93 Difference]: Finished difference Result 242 states and 248 transitions. [2022-03-18 00:53:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-18 00:53:30,183 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 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 229 [2022-03-18 00:53:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:53:30,184 INFO L225 Difference]: With dead ends: 242 [2022-03-18 00:53:30,184 INFO L226 Difference]: Without dead ends: 233 [2022-03-18 00:53:30,187 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 449 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7406 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=18025, Invalid=34187, Unknown=0, NotChecked=0, Total=52212 [2022-03-18 00:53:30,188 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:53:30,188 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 34 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:53:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-18 00:53:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-03-18 00:53:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0175438596491229) internal successors, (232), 228 states have internal predecessors, (232), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:53:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 236 transitions. [2022-03-18 00:53:30,195 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 236 transitions. Word has length 229 [2022-03-18 00:53:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:53:30,195 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 236 transitions. [2022-03-18 00:53:30,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 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) [2022-03-18 00:53:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 236 transitions. [2022-03-18 00:53:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-03-18 00:53:30,196 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:53:30,196 INFO L500 BasicCegarLoop]: trace histogram [110, 108, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:53:30,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-18 00:53:30,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,SelfDestructingSolverStorable217,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:53:30,397 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:53:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:53:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1028635381, now seen corresponding path program 217 times [2022-03-18 00:53:30,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:30,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1870362738] [2022-03-18 00:53:30,652 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:53:30,652 INFO L85 PathProgramCache]: Analyzing trace with hash 938361744, now seen corresponding path program 1 times [2022-03-18 00:53:30,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:30,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010411205] [2022-03-18 00:53:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:30,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:53:30,655 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:53:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:53:30,659 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:53:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1028635381, now seen corresponding path program 218 times [2022-03-18 00:53:30,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:30,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395975638] [2022-03-18 00:53:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:30,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:33,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:53:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 327 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:33,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:53:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395975638] [2022-03-18 00:53:33,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395975638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:53:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400051100] [2022-03-18 00:53:33,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:53:33,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:53:33,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:53:33,811 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:53:33,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-18 00:53:33,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:53:33,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:53:33,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 110 conjunts are in the unsatisfiable core [2022-03-18 00:53:33,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:53:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 327 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:34,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:53:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 327 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:40,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400051100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:53:40,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:53:40,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 111, 111] total 222 [2022-03-18 00:53:40,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:53:40,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1870362738] [2022-03-18 00:53:40,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1870362738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:40,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:40,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-03-18 00:53:40,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791087077] [2022-03-18 00:53:40,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:53:40,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-03-18 00:53:40,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:40,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-03-18 00:53:40,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24312, Invalid=24750, Unknown=0, NotChecked=0, Total=49062 [2022-03-18 00:53:40,170 INFO L87 Difference]: Start difference. First operand 233 states and 236 transitions. Second operand has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 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) [2022-03-18 00:53:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:53:42,969 INFO L93 Difference]: Finished difference Result 244 states and 250 transitions. [2022-03-18 00:53:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-18 00:53:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 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 231 [2022-03-18 00:53:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:53:42,969 INFO L225 Difference]: With dead ends: 244 [2022-03-18 00:53:42,969 INFO L226 Difference]: Without dead ends: 235 [2022-03-18 00:53:42,973 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6533 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=48402, Invalid=60828, Unknown=0, NotChecked=0, Total=109230 [2022-03-18 00:53:42,973 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:53:42,973 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 29 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:53:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-18 00:53:42,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-03-18 00:53:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:53:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2022-03-18 00:53:42,981 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 231 [2022-03-18 00:53:42,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:53:42,981 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2022-03-18 00:53:42,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 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) [2022-03-18 00:53:42,981 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2022-03-18 00:53:42,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-18 00:53:42,982 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:53:42,982 INFO L500 BasicCegarLoop]: trace histogram [111, 109, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:53:42,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-18 00:53:43,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220,SelfDestructingSolverStorable219 [2022-03-18 00:53:43,195 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:53:43,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:53:43,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2122779438, now seen corresponding path program 219 times [2022-03-18 00:53:43,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:43,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [100656135] [2022-03-18 00:53:43,317 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:53:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 997467088, now seen corresponding path program 1 times [2022-03-18 00:53:43,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:43,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254567877] [2022-03-18 00:53:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:43,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:53:43,320 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:53:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:53:43,322 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:53:43,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2122779438, now seen corresponding path program 220 times [2022-03-18 00:53:43,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:43,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917606933] [2022-03-18 00:53:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:43,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:45,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:53:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 330 proven. 11990 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:45,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:53:45,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917606933] [2022-03-18 00:53:45,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917606933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:53:45,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331395695] [2022-03-18 00:53:45,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:53:45,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:53:45,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:53:45,442 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:53:45,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-18 00:53:45,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:53:45,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:53:45,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-18 00:53:45,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:53:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 330 proven. 11990 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:45,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:53:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 330 proven. 11990 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:52,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331395695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:53:52,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:53:52,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 224 [2022-03-18 00:53:52,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:53:52,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [100656135] [2022-03-18 00:53:52,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [100656135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:52,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:52,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-03-18 00:53:52,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615591154] [2022-03-18 00:53:52,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:53:52,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-03-18 00:53:52,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-03-18 00:53:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24755, Invalid=25197, Unknown=0, NotChecked=0, Total=49952 [2022-03-18 00:53:52,067 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 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) [2022-03-18 00:53:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:53:56,124 INFO L93 Difference]: Finished difference Result 246 states and 252 transitions. [2022-03-18 00:53:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-18 00:53:56,124 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 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 233 [2022-03-18 00:53:56,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:53:56,125 INFO L225 Difference]: With dead ends: 246 [2022-03-18 00:53:56,125 INFO L226 Difference]: Without dead ends: 237 [2022-03-18 00:53:56,130 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6648 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=49286, Invalid=61936, Unknown=0, NotChecked=0, Total=111222 [2022-03-18 00:53:56,131 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:53:56,131 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 39 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:53:56,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-18 00:53:56,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-03-18 00:53:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0172413793103448) internal successors, (236), 232 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:53:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 240 transitions. [2022-03-18 00:53:56,162 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 240 transitions. Word has length 233 [2022-03-18 00:53:56,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:53:56,162 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 240 transitions. [2022-03-18 00:53:56,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 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) [2022-03-18 00:53:56,162 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 240 transitions. [2022-03-18 00:53:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-03-18 00:53:56,162 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:53:56,163 INFO L500 BasicCegarLoop]: trace histogram [112, 110, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:53:56,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-18 00:53:56,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221,SelfDestructingSolverStorable222 [2022-03-18 00:53:56,380 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:53:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:53:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1614490479, now seen corresponding path program 221 times [2022-03-18 00:53:56,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:56,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [956019239] [2022-03-18 00:53:56,552 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:53:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1056572432, now seen corresponding path program 1 times [2022-03-18 00:53:56,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:56,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414969316] [2022-03-18 00:53:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:56,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:53:56,554 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:53:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:53:56,555 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:53:56,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1614490479, now seen corresponding path program 222 times [2022-03-18 00:53:56,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:56,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791288336] [2022-03-18 00:53:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:56,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:58,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:53:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 333 proven. 12210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:53:58,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:53:58,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791288336] [2022-03-18 00:53:58,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791288336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:53:58,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735777371] [2022-03-18 00:53:58,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:53:58,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:53:58,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:53:58,710 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:53:58,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-18 00:53:58,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:53:58,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:53:58,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:53:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:53:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 334 refuted. 0 times theorem prover too weak. 12210 trivial. 0 not checked. [2022-03-18 00:53:59,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:53:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 334 refuted. 0 times theorem prover too weak. 12210 trivial. 0 not checked. [2022-03-18 00:53:59,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735777371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:53:59,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:53:59,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 8, 8] total 124 [2022-03-18 00:53:59,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:53:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [956019239] [2022-03-18 00:53:59,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [956019239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:59,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:59,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-03-18 00:53:59,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532005229] [2022-03-18 00:53:59,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:53:59,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-18 00:53:59,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:59,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-18 00:53:59,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6370, Invalid=8882, Unknown=0, NotChecked=0, Total=15252 [2022-03-18 00:53:59,361 INFO L87 Difference]: Start difference. First operand 237 states and 240 transitions. Second operand has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 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) [2022-03-18 00:54:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:54:02,335 INFO L93 Difference]: Finished difference Result 248 states and 254 transitions. [2022-03-18 00:54:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-18 00:54:02,336 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 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 235 [2022-03-18 00:54:02,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:54:02,336 INFO L225 Difference]: With dead ends: 248 [2022-03-18 00:54:02,336 INFO L226 Difference]: Without dead ends: 239 [2022-03-18 00:54:02,339 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 461 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7778 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=19024, Invalid=35966, Unknown=0, NotChecked=0, Total=54990 [2022-03-18 00:54:02,339 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:54:02,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 29 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:54:02,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-18 00:54:02,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-03-18 00:54:02,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.017094017094017) internal successors, (238), 234 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:54:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 242 transitions. [2022-03-18 00:54:02,347 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 242 transitions. Word has length 235 [2022-03-18 00:54:02,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:54:02,347 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 242 transitions. [2022-03-18 00:54:02,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 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) [2022-03-18 00:54:02,347 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 242 transitions. [2022-03-18 00:54:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-03-18 00:54:02,348 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:54:02,348 INFO L500 BasicCegarLoop]: trace histogram [113, 111, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:54:02,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-18 00:54:02,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223,SelfDestructingSolverStorable224 [2022-03-18 00:54:02,551 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:54:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:54:02,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1756746036, now seen corresponding path program 223 times [2022-03-18 00:54:02,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:02,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [698582881] [2022-03-18 00:54:02,759 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:54:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1115677776, now seen corresponding path program 1 times [2022-03-18 00:54:02,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:02,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044863515] [2022-03-18 00:54:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:02,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:54:02,761 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:54:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:54:02,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:54:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1756746036, now seen corresponding path program 224 times [2022-03-18 00:54:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:02,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843759161] [2022-03-18 00:54:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:02,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:04,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:54:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 336 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:04,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:54:04,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843759161] [2022-03-18 00:54:04,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843759161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:54:04,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056114036] [2022-03-18 00:54:04,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:54:04,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:54:04,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:54:04,904 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:54:04,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-18 00:54:04,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:54:04,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:54:04,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-18 00:54:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:54:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 336 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:05,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:54:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 336 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:11,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056114036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:54:11,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:54:11,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 114, 114] total 228 [2022-03-18 00:54:11,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:54:11,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [698582881] [2022-03-18 00:54:11,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [698582881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:11,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:11,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-03-18 00:54:11,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83902331] [2022-03-18 00:54:11,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:54:11,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-18 00:54:11,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:11,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-18 00:54:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25653, Invalid=26103, Unknown=0, NotChecked=0, Total=51756 [2022-03-18 00:54:11,630 INFO L87 Difference]: Start difference. First operand 239 states and 242 transitions. Second operand has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 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) [2022-03-18 00:54:14,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:54:14,609 INFO L93 Difference]: Finished difference Result 250 states and 256 transitions. [2022-03-18 00:54:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-18 00:54:14,609 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 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 237 [2022-03-18 00:54:14,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:54:14,609 INFO L225 Difference]: With dead ends: 250 [2022-03-18 00:54:14,609 INFO L226 Difference]: Without dead ends: 241 [2022-03-18 00:54:14,613 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=51078, Invalid=64182, Unknown=0, NotChecked=0, Total=115260 [2022-03-18 00:54:14,614 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:54:14,614 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 44 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:54:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-18 00:54:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-03-18 00:54:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0169491525423728) internal successors, (240), 236 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:54:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 244 transitions. [2022-03-18 00:54:14,621 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 244 transitions. Word has length 237 [2022-03-18 00:54:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:54:14,621 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 244 transitions. [2022-03-18 00:54:14,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 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) [2022-03-18 00:54:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 244 transitions. [2022-03-18 00:54:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-18 00:54:14,623 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:54:14,623 INFO L500 BasicCegarLoop]: trace histogram [114, 112, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:54:14,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-18 00:54:14,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225,SelfDestructingSolverStorable226 [2022-03-18 00:54:14,838 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:54:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:54:14,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1185271529, now seen corresponding path program 225 times [2022-03-18 00:54:14,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:14,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [449468743] [2022-03-18 00:54:15,073 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:54:15,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1174783120, now seen corresponding path program 1 times [2022-03-18 00:54:15,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:15,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975311440] [2022-03-18 00:54:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:15,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:54:15,075 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:54:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:54:15,076 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:54:15,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1185271529, now seen corresponding path program 226 times [2022-03-18 00:54:15,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:15,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829189470] [2022-03-18 00:54:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:15,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:18,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:54:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 339 proven. 12656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:18,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:54:18,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829189470] [2022-03-18 00:54:18,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829189470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:54:18,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864967808] [2022-03-18 00:54:18,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:54:18,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:54:18,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:54:18,086 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:54:18,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-18 00:54:18,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:54:18,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:54:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 114 conjunts are in the unsatisfiable core [2022-03-18 00:54:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:54:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 339 proven. 12656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:18,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:54:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 339 proven. 12656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:25,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864967808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:54:25,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:54:25,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 115, 115] total 230 [2022-03-18 00:54:25,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:54:25,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [449468743] [2022-03-18 00:54:25,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [449468743] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:25,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:25,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-03-18 00:54:25,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261417629] [2022-03-18 00:54:25,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:54:25,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-18 00:54:25,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-18 00:54:25,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26108, Invalid=26562, Unknown=0, NotChecked=0, Total=52670 [2022-03-18 00:54:25,063 INFO L87 Difference]: Start difference. First operand 241 states and 244 transitions. Second operand has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 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) [2022-03-18 00:54:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:54:28,038 INFO L93 Difference]: Finished difference Result 252 states and 258 transitions. [2022-03-18 00:54:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-18 00:54:28,039 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 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 239 [2022-03-18 00:54:28,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:54:28,039 INFO L225 Difference]: With dead ends: 252 [2022-03-18 00:54:28,039 INFO L226 Difference]: Without dead ends: 243 [2022-03-18 00:54:28,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6999 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=51986, Invalid=65320, Unknown=0, NotChecked=0, Total=117306 [2022-03-18 00:54:28,043 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:54:28,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 24 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:54:28,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-18 00:54:28,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-03-18 00:54:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0168067226890756) internal successors, (242), 238 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:54:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2022-03-18 00:54:28,050 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 239 [2022-03-18 00:54:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:54:28,050 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2022-03-18 00:54:28,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 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) [2022-03-18 00:54:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2022-03-18 00:54:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-03-18 00:54:28,051 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:54:28,051 INFO L500 BasicCegarLoop]: trace histogram [115, 113, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:54:28,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-18 00:54:28,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,SelfDestructingSolverStorable228,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:54:28,268 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:54:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:54:28,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1919296570, now seen corresponding path program 227 times [2022-03-18 00:54:28,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:28,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [891706181] [2022-03-18 00:54:28,436 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:54:28,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1233888464, now seen corresponding path program 1 times [2022-03-18 00:54:28,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:28,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887376574] [2022-03-18 00:54:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:28,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:54:28,439 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:54:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:54:28,451 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:54:28,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1919296570, now seen corresponding path program 228 times [2022-03-18 00:54:28,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:28,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80962293] [2022-03-18 00:54:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:28,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:30,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:54:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 342 proven. 12882 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:30,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:54:30,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80962293] [2022-03-18 00:54:30,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80962293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:54:30,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085392083] [2022-03-18 00:54:30,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:54:30,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:54:30,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:54:30,833 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:54:30,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-18 00:54:30,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:54:30,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:54:30,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:54:30,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:54:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 12882 trivial. 0 not checked. [2022-03-18 00:54:31,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:54:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 12882 trivial. 0 not checked. [2022-03-18 00:54:31,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085392083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:54:31,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:54:31,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 8, 8] total 127 [2022-03-18 00:54:31,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:54:31,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [891706181] [2022-03-18 00:54:31,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [891706181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:31,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:31,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-03-18 00:54:31,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322038553] [2022-03-18 00:54:31,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:54:31,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-18 00:54:31,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:31,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-18 00:54:31,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6712, Invalid=9290, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 00:54:31,462 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 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) [2022-03-18 00:54:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:54:34,551 INFO L93 Difference]: Finished difference Result 254 states and 260 transitions. [2022-03-18 00:54:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-18 00:54:34,552 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 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 241 [2022-03-18 00:54:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:54:34,552 INFO L225 Difference]: With dead ends: 254 [2022-03-18 00:54:34,552 INFO L226 Difference]: Without dead ends: 245 [2022-03-18 00:54:34,555 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 473 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8159 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=20050, Invalid=37790, Unknown=0, NotChecked=0, Total=57840 [2022-03-18 00:54:34,555 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:54:34,555 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 34 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:54:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-18 00:54:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-03-18 00:54:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:54:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2022-03-18 00:54:34,583 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 241 [2022-03-18 00:54:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:54:34,583 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2022-03-18 00:54:34,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 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) [2022-03-18 00:54:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2022-03-18 00:54:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-03-18 00:54:34,584 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:54:34,584 INFO L500 BasicCegarLoop]: trace histogram [116, 114, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:54:34,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-18 00:54:34,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,SelfDestructingSolverStorable229,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:54:34,799 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:54:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:54:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash -406968989, now seen corresponding path program 229 times [2022-03-18 00:54:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:34,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [195277461] [2022-03-18 00:54:34,940 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:54:34,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1292993808, now seen corresponding path program 1 times [2022-03-18 00:54:34,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:34,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584874942] [2022-03-18 00:54:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:34,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:54:34,943 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:54:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:54:34,946 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:54:34,946 INFO L85 PathProgramCache]: Analyzing trace with hash -406968989, now seen corresponding path program 230 times [2022-03-18 00:54:34,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:34,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767872690] [2022-03-18 00:54:34,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:34,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:37,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:54:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 345 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:37,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:54:37,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767872690] [2022-03-18 00:54:37,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767872690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:54:37,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557033232] [2022-03-18 00:54:37,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:54:37,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:54:37,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:54:37,193 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:54:37,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-18 00:54:37,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:54:37,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:54:37,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-18 00:54:37,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:54:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 345 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:37,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:54:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 345 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:44,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557033232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:54:44,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:54:44,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 117, 117] total 234 [2022-03-18 00:54:44,719 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:54:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [195277461] [2022-03-18 00:54:44,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [195277461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:44,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:44,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-03-18 00:54:44,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500194024] [2022-03-18 00:54:44,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:54:44,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-03-18 00:54:44,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:44,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-03-18 00:54:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27030, Invalid=27492, Unknown=0, NotChecked=0, Total=54522 [2022-03-18 00:54:44,724 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 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) [2022-03-18 00:54:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:54:47,839 INFO L93 Difference]: Finished difference Result 256 states and 262 transitions. [2022-03-18 00:54:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-18 00:54:47,839 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 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 243 [2022-03-18 00:54:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:54:47,841 INFO L225 Difference]: With dead ends: 256 [2022-03-18 00:54:47,841 INFO L226 Difference]: Without dead ends: 247 [2022-03-18 00:54:47,844 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7238 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=53826, Invalid=67626, Unknown=0, NotChecked=0, Total=121452 [2022-03-18 00:54:47,844 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:54:47,844 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 44 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:54:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-18 00:54:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-03-18 00:54:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 242 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:54:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 250 transitions. [2022-03-18 00:54:47,852 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 250 transitions. Word has length 243 [2022-03-18 00:54:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:54:47,852 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 250 transitions. [2022-03-18 00:54:47,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 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) [2022-03-18 00:54:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 250 transitions. [2022-03-18 00:54:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-03-18 00:54:47,852 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:54:47,853 INFO L500 BasicCegarLoop]: trace histogram [117, 115, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:54:47,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-18 00:54:48,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-18 00:54:48,068 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:54:48,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:54:48,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1240890304, now seen corresponding path program 231 times [2022-03-18 00:54:48,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:48,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [827791150] [2022-03-18 00:54:48,200 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:54:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1352099152, now seen corresponding path program 1 times [2022-03-18 00:54:48,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:48,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393844003] [2022-03-18 00:54:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:48,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:54:48,202 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:54:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:54:48,203 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:54:48,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1240890304, now seen corresponding path program 232 times [2022-03-18 00:54:48,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:48,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477232761] [2022-03-18 00:54:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:48,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:50,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:54:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 348 proven. 13340 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:50,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:54:50,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477232761] [2022-03-18 00:54:50,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477232761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:54:50,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492507914] [2022-03-18 00:54:50,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:54:50,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:54:50,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:54:50,469 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:54:50,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-18 00:54:50,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:54:50,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:54:50,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-18 00:54:50,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:54:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 348 proven. 13340 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:50,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:54:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 348 proven. 13340 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:54:57,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492507914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:54:57,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:54:57,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 118, 118] total 236 [2022-03-18 00:54:57,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:54:57,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [827791150] [2022-03-18 00:54:57,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [827791150] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:57,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:57,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-03-18 00:54:57,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974525217] [2022-03-18 00:54:57,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:54:57,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-03-18 00:54:57,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:57,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-03-18 00:54:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27497, Invalid=27963, Unknown=0, NotChecked=0, Total=55460 [2022-03-18 00:54:57,726 INFO L87 Difference]: Start difference. First operand 247 states and 250 transitions. Second operand has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 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) [2022-03-18 00:55:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:55:00,850 INFO L93 Difference]: Finished difference Result 258 states and 264 transitions. [2022-03-18 00:55:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-18 00:55:00,851 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 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 245 [2022-03-18 00:55:00,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:55:00,851 INFO L225 Difference]: With dead ends: 258 [2022-03-18 00:55:00,851 INFO L226 Difference]: Without dead ends: 249 [2022-03-18 00:55:00,855 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7359 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=54758, Invalid=68794, Unknown=0, NotChecked=0, Total=123552 [2022-03-18 00:55:00,855 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:55:00,855 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 39 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:55:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-18 00:55:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-03-18 00:55:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0163934426229508) internal successors, (248), 244 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:55:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 252 transitions. [2022-03-18 00:55:00,863 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 252 transitions. Word has length 245 [2022-03-18 00:55:00,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:55:00,863 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 252 transitions. [2022-03-18 00:55:00,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 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) [2022-03-18 00:55:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 252 transitions. [2022-03-18 00:55:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-03-18 00:55:00,864 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:55:00,864 INFO L500 BasicCegarLoop]: trace histogram [118, 116, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:55:00,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-18 00:55:01,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233,SelfDestructingSolverStorable234 [2022-03-18 00:55:01,080 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:55:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:55:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash -9261347, now seen corresponding path program 233 times [2022-03-18 00:55:01,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:01,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [980798900] [2022-03-18 00:55:01,294 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:55:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1411204496, now seen corresponding path program 1 times [2022-03-18 00:55:01,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:01,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912683772] [2022-03-18 00:55:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:01,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:55:01,296 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:55:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:55:01,297 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:55:01,298 INFO L85 PathProgramCache]: Analyzing trace with hash -9261347, now seen corresponding path program 234 times [2022-03-18 00:55:01,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:01,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805460789] [2022-03-18 00:55:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:01,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:04,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:55:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 351 proven. 13572 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:55:04,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:55:04,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805460789] [2022-03-18 00:55:04,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805460789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:55:04,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159827958] [2022-03-18 00:55:04,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:55:04,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:55:04,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:55:04,361 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:55:04,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-18 00:55:04,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:55:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:55:04,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:55:04,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:55:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 13572 trivial. 0 not checked. [2022-03-18 00:55:04,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:55:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 13572 trivial. 0 not checked. [2022-03-18 00:55:05,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159827958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:55:05,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:55:05,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 8, 8] total 130 [2022-03-18 00:55:05,007 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:55:05,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [980798900] [2022-03-18 00:55:05,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [980798900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:05,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:05,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-03-18 00:55:05,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023563333] [2022-03-18 00:55:05,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:55:05,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-03-18 00:55:05,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-03-18 00:55:05,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7063, Invalid=9707, Unknown=0, NotChecked=0, Total=16770 [2022-03-18 00:55:05,010 INFO L87 Difference]: Start difference. First operand 249 states and 252 transitions. Second operand has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 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) [2022-03-18 00:55:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:55:08,288 INFO L93 Difference]: Finished difference Result 260 states and 266 transitions. [2022-03-18 00:55:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-18 00:55:08,288 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 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 247 [2022-03-18 00:55:08,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:55:08,289 INFO L225 Difference]: With dead ends: 260 [2022-03-18 00:55:08,289 INFO L226 Difference]: Without dead ends: 251 [2022-03-18 00:55:08,292 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 485 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8549 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=21103, Invalid=39659, Unknown=0, NotChecked=0, Total=60762 [2022-03-18 00:55:08,292 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 125 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:55:08,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 39 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:55:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-18 00:55:08,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-03-18 00:55:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.016260162601626) internal successors, (250), 246 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:55:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2022-03-18 00:55:08,299 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 247 [2022-03-18 00:55:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:55:08,299 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2022-03-18 00:55:08,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 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) [2022-03-18 00:55:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2022-03-18 00:55:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-03-18 00:55:08,300 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:55:08,300 INFO L500 BasicCegarLoop]: trace histogram [119, 117, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:55:08,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-18 00:55:08,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-18 00:55:08,507 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:55:08,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:55:08,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1185844922, now seen corresponding path program 235 times [2022-03-18 00:55:08,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:08,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [53026547] [2022-03-18 00:55:08,692 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:55:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1470309840, now seen corresponding path program 1 times [2022-03-18 00:55:08,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:08,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873918098] [2022-03-18 00:55:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:08,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:55:08,694 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:55:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:55:08,695 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:55:08,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1185844922, now seen corresponding path program 236 times [2022-03-18 00:55:08,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041385897] [2022-03-18 00:55:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:08,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:11,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:55:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 354 proven. 13806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:55:11,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:55:11,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041385897] [2022-03-18 00:55:11,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041385897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:55:11,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18336867] [2022-03-18 00:55:11,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:55:11,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:55:11,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:55:11,103 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:55:11,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-18 00:55:11,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:55:11,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:55:11,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 119 conjunts are in the unsatisfiable core [2022-03-18 00:55:11,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:55:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 354 proven. 13806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:55:11,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:55:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 354 proven. 13806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:55:18,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18336867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:55:18,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:55:18,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 120, 120] total 240 [2022-03-18 00:55:18,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:55:18,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [53026547] [2022-03-18 00:55:18,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [53026547] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:18,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:18,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-03-18 00:55:18,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587092299] [2022-03-18 00:55:18,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:55:18,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-03-18 00:55:18,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-03-18 00:55:18,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28443, Invalid=28917, Unknown=0, NotChecked=0, Total=57360 [2022-03-18 00:55:18,609 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 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) [2022-03-18 00:55:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:55:21,843 INFO L93 Difference]: Finished difference Result 262 states and 268 transitions. [2022-03-18 00:55:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-03-18 00:55:21,843 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 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 249 [2022-03-18 00:55:21,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:55:21,844 INFO L225 Difference]: With dead ends: 262 [2022-03-18 00:55:21,844 INFO L226 Difference]: Without dead ends: 253 [2022-03-18 00:55:21,849 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7604 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=56646, Invalid=71160, Unknown=0, NotChecked=0, Total=127806 [2022-03-18 00:55:21,849 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:55:21,849 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 34 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:55:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-18 00:55:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-03-18 00:55:21,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0161290322580645) internal successors, (252), 248 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:55:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 256 transitions. [2022-03-18 00:55:21,857 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 256 transitions. Word has length 249 [2022-03-18 00:55:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:55:21,857 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 256 transitions. [2022-03-18 00:55:21,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 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) [2022-03-18 00:55:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 256 transitions. [2022-03-18 00:55:21,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-03-18 00:55:21,858 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:55:21,858 INFO L500 BasicCegarLoop]: trace histogram [120, 118, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:55:21,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-18 00:55:22,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237,SelfDestructingSolverStorable238 [2022-03-18 00:55:22,075 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:55:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:55:22,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1368265897, now seen corresponding path program 237 times [2022-03-18 00:55:22,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:22,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [725464703] [2022-03-18 00:55:22,244 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:55:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1529415184, now seen corresponding path program 1 times [2022-03-18 00:55:22,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:22,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557956756] [2022-03-18 00:55:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:22,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:55:22,246 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:55:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:55:22,247 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:55:22,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1368265897, now seen corresponding path program 238 times [2022-03-18 00:55:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:22,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170042276] [2022-03-18 00:55:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:22,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:26,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:55:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 357 proven. 14042 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:55:26,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:55:26,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170042276] [2022-03-18 00:55:26,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170042276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:55:26,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938912409] [2022-03-18 00:55:26,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:55:26,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:55:26,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:55:26,447 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:55:26,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-18 00:55:26,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:55:26,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:55:26,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-18 00:55:26,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:55:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 357 proven. 14042 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:55:26,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:55:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 357 proven. 14042 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:55:34,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938912409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:55:34,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:55:34,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 121, 121] total 242 [2022-03-18 00:55:34,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:55:34,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [725464703] [2022-03-18 00:55:34,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [725464703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:34,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:34,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-03-18 00:55:34,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376538471] [2022-03-18 00:55:34,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:55:34,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-03-18 00:55:34,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:34,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-03-18 00:55:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28922, Invalid=29400, Unknown=0, NotChecked=0, Total=58322 [2022-03-18 00:55:34,210 INFO L87 Difference]: Start difference. First operand 253 states and 256 transitions. Second operand has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 states have internal predecessors, (247), 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) [2022-03-18 00:55:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:55:37,534 INFO L93 Difference]: Finished difference Result 264 states and 270 transitions. [2022-03-18 00:55:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-18 00:55:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 states have internal predecessors, (247), 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 251 [2022-03-18 00:55:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:55:37,535 INFO L225 Difference]: With dead ends: 264 [2022-03-18 00:55:37,535 INFO L226 Difference]: Without dead ends: 255 [2022-03-18 00:55:37,540 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7728 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=57602, Invalid=72358, Unknown=0, NotChecked=0, Total=129960 [2022-03-18 00:55:37,540 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:55:37,540 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 24 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:55:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-18 00:55:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-03-18 00:55:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:55:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-03-18 00:55:37,548 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 251 [2022-03-18 00:55:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:55:37,548 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-03-18 00:55:37,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 states have internal predecessors, (247), 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) [2022-03-18 00:55:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-03-18 00:55:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-03-18 00:55:37,549 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:55:37,549 INFO L500 BasicCegarLoop]: trace histogram [121, 119, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:55:37,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-18 00:55:37,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-03-18 00:55:37,766 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:55:37,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:55:37,767 INFO L85 PathProgramCache]: Analyzing trace with hash 852530356, now seen corresponding path program 239 times [2022-03-18 00:55:37,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:37,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [575814348] [2022-03-18 00:55:38,067 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:55:38,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1588520528, now seen corresponding path program 1 times [2022-03-18 00:55:38,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:38,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877257495] [2022-03-18 00:55:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:38,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:55:38,069 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:55:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:55:38,071 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:55:38,071 INFO L85 PathProgramCache]: Analyzing trace with hash 852530356, now seen corresponding path program 240 times [2022-03-18 00:55:38,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:38,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805377497] [2022-03-18 00:55:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:38,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:41,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:55:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 360 proven. 14280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:55:41,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:55:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805377497] [2022-03-18 00:55:41,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805377497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:55:41,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601302797] [2022-03-18 00:55:41,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:55:41,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:55:41,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:55:41,881 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:55:41,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-18 00:55:41,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:55:41,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:55:41,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:55:41,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:55:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2022-03-18 00:55:42,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:55:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2022-03-18 00:55:42,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601302797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:55:42,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:55:42,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 8, 8] total 133 [2022-03-18 00:55:42,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:55:42,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [575814348] [2022-03-18 00:55:42,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [575814348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:42,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:42,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-03-18 00:55:42,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103729167] [2022-03-18 00:55:42,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:55:42,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-18 00:55:42,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-18 00:55:42,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7423, Invalid=10133, Unknown=0, NotChecked=0, Total=17556 [2022-03-18 00:55:42,666 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 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) [2022-03-18 00:55:46,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:55:46,260 INFO L93 Difference]: Finished difference Result 266 states and 272 transitions. [2022-03-18 00:55:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-18 00:55:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 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 253 [2022-03-18 00:55:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:55:46,261 INFO L225 Difference]: With dead ends: 266 [2022-03-18 00:55:46,261 INFO L226 Difference]: Without dead ends: 257 [2022-03-18 00:55:46,263 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 497 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8948 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=22183, Invalid=41573, Unknown=0, NotChecked=0, Total=63756 [2022-03-18 00:55:46,263 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:55:46,263 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 24 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:55:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-18 00:55:46,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-03-18 00:55:46,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0158730158730158) internal successors, (256), 252 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:55:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 260 transitions. [2022-03-18 00:55:46,270 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 260 transitions. Word has length 253 [2022-03-18 00:55:46,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:55:46,271 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 260 transitions. [2022-03-18 00:55:46,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 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) [2022-03-18 00:55:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 260 transitions. [2022-03-18 00:55:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-03-18 00:55:46,271 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:55:46,272 INFO L500 BasicCegarLoop]: trace histogram [122, 120, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:55:46,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-18 00:55:46,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,SelfDestructingSolverStorable242,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:55:46,487 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:55:46,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:55:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash 438983377, now seen corresponding path program 241 times [2022-03-18 00:55:46,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:46,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [557696308] [2022-03-18 00:55:46,636 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:55:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1647625872, now seen corresponding path program 1 times [2022-03-18 00:55:46,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:46,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842168512] [2022-03-18 00:55:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:46,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:55:46,638 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:55:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:55:46,639 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:55:46,640 INFO L85 PathProgramCache]: Analyzing trace with hash 438983377, now seen corresponding path program 242 times [2022-03-18 00:55:46,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:46,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794238420] [2022-03-18 00:55:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:46,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:49,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:55:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 363 proven. 14520 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:55:49,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:55:49,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794238420] [2022-03-18 00:55:49,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794238420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:55:49,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4653110] [2022-03-18 00:55:49,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:55:49,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:55:49,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:55:49,367 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:55:49,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-18 00:55:49,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:55:49,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:55:49,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 122 conjunts are in the unsatisfiable core [2022-03-18 00:55:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:55:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 363 proven. 14520 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:55:49,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:55:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 363 proven. 14520 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:55:58,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4653110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:55:58,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:55:58,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 123, 123] total 246 [2022-03-18 00:55:58,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:55:58,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [557696308] [2022-03-18 00:55:58,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [557696308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:58,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:58,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-03-18 00:55:58,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216130847] [2022-03-18 00:55:58,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:55:58,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-03-18 00:55:58,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:58,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-03-18 00:55:58,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29892, Invalid=30378, Unknown=0, NotChecked=0, Total=60270 [2022-03-18 00:55:58,048 INFO L87 Difference]: Start difference. First operand 257 states and 260 transitions. Second operand has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 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) [2022-03-18 00:56:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:56:01,686 INFO L93 Difference]: Finished difference Result 268 states and 274 transitions. [2022-03-18 00:56:01,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-18 00:56:01,686 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 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 255 [2022-03-18 00:56:01,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:56:01,686 INFO L225 Difference]: With dead ends: 268 [2022-03-18 00:56:01,686 INFO L226 Difference]: Without dead ends: 259 [2022-03-18 00:56:01,692 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7979 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=59538, Invalid=74784, Unknown=0, NotChecked=0, Total=134322 [2022-03-18 00:56:01,692 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:56:01,692 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 19 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:56:01,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-18 00:56:01,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-03-18 00:56:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.015748031496063) internal successors, (258), 254 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:56:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 262 transitions. [2022-03-18 00:56:01,699 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 262 transitions. Word has length 255 [2022-03-18 00:56:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:56:01,700 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 262 transitions. [2022-03-18 00:56:01,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 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) [2022-03-18 00:56:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 262 transitions. [2022-03-18 00:56:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-03-18 00:56:01,700 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:56:01,700 INFO L500 BasicCegarLoop]: trace histogram [123, 121, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:56:01,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-18 00:56:01,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243,SelfDestructingSolverStorable244 [2022-03-18 00:56:01,907 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:56:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:56:01,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1842672210, now seen corresponding path program 243 times [2022-03-18 00:56:01,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:01,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1611268098] [2022-03-18 00:56:02,081 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:56:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1706731216, now seen corresponding path program 1 times [2022-03-18 00:56:02,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:56:02,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172531525] [2022-03-18 00:56:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:56:02,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:56:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:56:02,083 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:56:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:56:02,085 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:56:02,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1842672210, now seen corresponding path program 244 times [2022-03-18 00:56:02,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:56:02,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689002657] [2022-03-18 00:56:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:56:02,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:56:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:05,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:56:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 366 proven. 14762 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:56:05,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:56:05,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689002657] [2022-03-18 00:56:05,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689002657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:56:05,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562964896] [2022-03-18 00:56:05,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:56:05,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:56:05,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:56:05,930 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:56:05,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-18 00:56:05,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:56:06,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:56:06,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-18 00:56:06,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:56:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 366 proven. 14762 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:56:06,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:56:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 366 proven. 14762 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:56:14,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562964896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:56:14,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:56:14,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 124, 124] total 248 [2022-03-18 00:56:14,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:56:14,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1611268098] [2022-03-18 00:56:14,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1611268098] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:56:14,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:56:14,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-03-18 00:56:14,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573226951] [2022-03-18 00:56:14,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:56:14,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-03-18 00:56:14,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:14,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-03-18 00:56:14,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30383, Invalid=30873, Unknown=0, NotChecked=0, Total=61256 [2022-03-18 00:56:14,668 INFO L87 Difference]: Start difference. First operand 259 states and 262 transitions. Second operand has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 states have internal predecessors, (253), 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) [2022-03-18 00:56:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:56:18,580 INFO L93 Difference]: Finished difference Result 270 states and 276 transitions. [2022-03-18 00:56:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-18 00:56:18,580 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 states have internal predecessors, (253), 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 257 [2022-03-18 00:56:18,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:56:18,581 INFO L225 Difference]: With dead ends: 270 [2022-03-18 00:56:18,581 INFO L226 Difference]: Without dead ends: 261 [2022-03-18 00:56:18,585 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8106 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=60518, Invalid=76012, Unknown=0, NotChecked=0, Total=136530 [2022-03-18 00:56:18,585 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:56:18,585 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 34 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:56:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-18 00:56:18,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-03-18 00:56:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.015625) internal successors, (260), 256 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:56:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 264 transitions. [2022-03-18 00:56:18,594 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 264 transitions. Word has length 257 [2022-03-18 00:56:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:56:18,594 INFO L478 AbstractCegarLoop]: Abstraction has 261 states and 264 transitions. [2022-03-18 00:56:18,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 states have internal predecessors, (253), 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) [2022-03-18 00:56:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 264 transitions. [2022-03-18 00:56:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-03-18 00:56:18,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:56:18,595 INFO L500 BasicCegarLoop]: trace histogram [124, 122, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:56:18,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-18 00:56:18,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,SelfDestructingSolverStorable246,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:56:18,812 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:56:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:56:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash 214596939, now seen corresponding path program 245 times [2022-03-18 00:56:18,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:18,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1759670912] [2022-03-18 00:56:19,047 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:56:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1765836560, now seen corresponding path program 1 times [2022-03-18 00:56:19,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:56:19,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829635529] [2022-03-18 00:56:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:56:19,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:56:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:56:19,050 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:56:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:56:19,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:56:19,051 INFO L85 PathProgramCache]: Analyzing trace with hash 214596939, now seen corresponding path program 246 times [2022-03-18 00:56:19,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:56:19,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965627154] [2022-03-18 00:56:19,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:56:19,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:56:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:23,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:56:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 369 proven. 15006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:56:23,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:56:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965627154] [2022-03-18 00:56:23,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965627154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:56:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717184691] [2022-03-18 00:56:23,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:56:23,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:56:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:56:23,384 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:56:23,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-18 00:56:23,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:56:23,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:56:23,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:56:23,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:56:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 15006 trivial. 0 not checked. [2022-03-18 00:56:23,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:56:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 15006 trivial. 0 not checked. [2022-03-18 00:56:24,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717184691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:56:24,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:56:24,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 8, 8] total 136 [2022-03-18 00:56:24,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:56:24,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1759670912] [2022-03-18 00:56:24,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1759670912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:56:24,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:56:24,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-03-18 00:56:24,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308585043] [2022-03-18 00:56:24,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:56:24,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-03-18 00:56:24,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-03-18 00:56:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7792, Invalid=10568, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 00:56:24,100 INFO L87 Difference]: Start difference. First operand 261 states and 264 transitions. Second operand has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 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) [2022-03-18 00:56:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:56:27,681 INFO L93 Difference]: Finished difference Result 272 states and 278 transitions. [2022-03-18 00:56:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-18 00:56:27,681 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 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 259 [2022-03-18 00:56:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:56:27,681 INFO L225 Difference]: With dead ends: 272 [2022-03-18 00:56:27,681 INFO L226 Difference]: Without dead ends: 263 [2022-03-18 00:56:27,684 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 509 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9356 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=23290, Invalid=43532, Unknown=0, NotChecked=0, Total=66822 [2022-03-18 00:56:27,684 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 131 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:56:27,684 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 24 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:56:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-18 00:56:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-03-18 00:56:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0155038759689923) internal successors, (262), 258 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:56:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 266 transitions. [2022-03-18 00:56:27,691 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 266 transitions. Word has length 259 [2022-03-18 00:56:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:56:27,692 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 266 transitions. [2022-03-18 00:56:27,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 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) [2022-03-18 00:56:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 266 transitions. [2022-03-18 00:56:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-03-18 00:56:27,693 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:56:27,693 INFO L500 BasicCegarLoop]: trace histogram [125, 123, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:56:27,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-18 00:56:27,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,SelfDestructingSolverStorable248,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:56:27,908 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:56:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:56:27,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1565292968, now seen corresponding path program 247 times [2022-03-18 00:56:27,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:27,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1965815738] [2022-03-18 00:56:28,108 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:56:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1824941904, now seen corresponding path program 1 times [2022-03-18 00:56:28,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:56:28,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855647061] [2022-03-18 00:56:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:56:28,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:56:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:56:28,110 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:56:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:56:28,115 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:56:28,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1565292968, now seen corresponding path program 248 times [2022-03-18 00:56:28,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:56:28,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039019947] [2022-03-18 00:56:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:56:28,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:56:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:30,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:56:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 372 proven. 15252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:56:30,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:56:30,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039019947] [2022-03-18 00:56:30,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039019947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:56:30,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102361980] [2022-03-18 00:56:30,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:56:30,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:56:30,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:56:30,672 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:56:30,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-18 00:56:30,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:56:30,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:56:30,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 125 conjunts are in the unsatisfiable core [2022-03-18 00:56:30,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:56:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 372 proven. 15252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:56:30,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:56:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 372 proven. 15252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:56:38,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102361980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:56:38,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:56:38,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 126, 126] total 252 [2022-03-18 00:56:38,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:56:38,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1965815738] [2022-03-18 00:56:38,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1965815738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:56:38,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:56:38,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-03-18 00:56:38,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037457283] [2022-03-18 00:56:38,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:56:38,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-03-18 00:56:38,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:38,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-03-18 00:56:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31377, Invalid=31875, Unknown=0, NotChecked=0, Total=63252 [2022-03-18 00:56:38,766 INFO L87 Difference]: Start difference. First operand 263 states and 266 transitions. Second operand has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 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) [2022-03-18 00:56:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:56:42,372 INFO L93 Difference]: Finished difference Result 274 states and 280 transitions. [2022-03-18 00:56:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-18 00:56:42,372 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 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 261 [2022-03-18 00:56:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:56:42,373 INFO L225 Difference]: With dead ends: 274 [2022-03-18 00:56:42,373 INFO L226 Difference]: Without dead ends: 265 [2022-03-18 00:56:42,379 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8363 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=62502, Invalid=78498, Unknown=0, NotChecked=0, Total=141000 [2022-03-18 00:56:42,379 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:56:42,379 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 59 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:56:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-18 00:56:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-03-18 00:56:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0153846153846153) internal successors, (264), 260 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:56:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 268 transitions. [2022-03-18 00:56:42,387 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 268 transitions. Word has length 261 [2022-03-18 00:56:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:56:42,388 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 268 transitions. [2022-03-18 00:56:42,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 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) [2022-03-18 00:56:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 268 transitions. [2022-03-18 00:56:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-03-18 00:56:42,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:56:42,389 INFO L500 BasicCegarLoop]: trace histogram [126, 124, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:56:42,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-18 00:56:42,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-18 00:56:42,607 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:56:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:56:42,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1790913851, now seen corresponding path program 249 times [2022-03-18 00:56:42,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:42,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393001063] [2022-03-18 00:56:42,794 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:56:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1884047248, now seen corresponding path program 1 times [2022-03-18 00:56:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:56:42,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367845370] [2022-03-18 00:56:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:56:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:56:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:56:42,819 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:56:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:56:42,821 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:56:42,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1790913851, now seen corresponding path program 250 times [2022-03-18 00:56:42,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:56:42,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247352679] [2022-03-18 00:56:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:56:42,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:56:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:46,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:56:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 375 proven. 15500 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:56:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:56:46,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247352679] [2022-03-18 00:56:46,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247352679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:56:46,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694679073] [2022-03-18 00:56:46,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:56:46,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:56:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:56:46,995 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:56:46,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-18 00:56:47,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:56:47,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:56:47,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 126 conjunts are in the unsatisfiable core [2022-03-18 00:56:47,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:56:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 375 proven. 15500 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:56:47,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:56:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 375 proven. 15500 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:56:57,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694679073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:56:57,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:56:57,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 127, 127] total 254 [2022-03-18 00:56:57,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:56:57,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393001063] [2022-03-18 00:56:57,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393001063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:56:57,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:56:57,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-03-18 00:56:57,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865093751] [2022-03-18 00:56:57,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:56:57,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-03-18 00:56:57,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:57,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-03-18 00:56:57,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31880, Invalid=32382, Unknown=0, NotChecked=0, Total=64262 [2022-03-18 00:56:57,245 INFO L87 Difference]: Start difference. First operand 265 states and 268 transitions. Second operand has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 states have internal predecessors, (259), 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) [2022-03-18 00:57:01,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:01,560 INFO L93 Difference]: Finished difference Result 276 states and 282 transitions. [2022-03-18 00:57:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-18 00:57:01,561 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 states have internal predecessors, (259), 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 263 [2022-03-18 00:57:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:01,562 INFO L225 Difference]: With dead ends: 276 [2022-03-18 00:57:01,562 INFO L226 Difference]: Without dead ends: 267 [2022-03-18 00:57:01,569 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8493 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=63506, Invalid=79756, Unknown=0, NotChecked=0, Total=143262 [2022-03-18 00:57:01,570 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:01,571 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 39 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:57:01,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-18 00:57:01,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-03-18 00:57:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.015267175572519) internal successors, (266), 262 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 270 transitions. [2022-03-18 00:57:01,584 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 270 transitions. Word has length 263 [2022-03-18 00:57:01,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:01,585 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 270 transitions. [2022-03-18 00:57:01,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 states have internal predecessors, (259), 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) [2022-03-18 00:57:01,585 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 270 transitions. [2022-03-18 00:57:01,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-03-18 00:57:01,586 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:01,586 INFO L500 BasicCegarLoop]: trace histogram [127, 125, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:01,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:01,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,SelfDestructingSolverStorable252,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:01,804 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:01,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:01,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1585227614, now seen corresponding path program 251 times [2022-03-18 00:57:01,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:01,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [720970335] [2022-03-18 00:57:01,965 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1943152592, now seen corresponding path program 1 times [2022-03-18 00:57:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:01,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702722576] [2022-03-18 00:57:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:01,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:01,968 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:01,971 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:01,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1585227614, now seen corresponding path program 252 times [2022-03-18 00:57:01,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:01,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255890196] [2022-03-18 00:57:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:01,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:04,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 378 proven. 15750 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:57:04,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:04,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255890196] [2022-03-18 00:57:04,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255890196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:04,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830527690] [2022-03-18 00:57:04,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:57:04,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:04,924 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:57:04,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-18 00:57:04,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:57:04,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:04,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:57:04,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 15750 trivial. 0 not checked. [2022-03-18 00:57:05,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 15750 trivial. 0 not checked. [2022-03-18 00:57:05,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830527690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:05,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:05,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 8, 8] total 139 [2022-03-18 00:57:05,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:05,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [720970335] [2022-03-18 00:57:05,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [720970335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:05,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:05,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-03-18 00:57:05,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922028477] [2022-03-18 00:57:05,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:05,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-18 00:57:05,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:05,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-18 00:57:05,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8170, Invalid=11012, Unknown=0, NotChecked=0, Total=19182 [2022-03-18 00:57:05,624 INFO L87 Difference]: Start difference. First operand 267 states and 270 transitions. Second operand has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 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) [2022-03-18 00:57:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:09,378 INFO L93 Difference]: Finished difference Result 278 states and 284 transitions. [2022-03-18 00:57:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-18 00:57:09,379 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 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 265 [2022-03-18 00:57:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:09,380 INFO L225 Difference]: With dead ends: 278 [2022-03-18 00:57:09,380 INFO L226 Difference]: Without dead ends: 269 [2022-03-18 00:57:09,384 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 521 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9773 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=24424, Invalid=45536, Unknown=0, NotChecked=0, Total=69960 [2022-03-18 00:57:09,385 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:09,385 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 29 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:57:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-18 00:57:09,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-03-18 00:57:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.0151515151515151) internal successors, (268), 264 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 272 transitions. [2022-03-18 00:57:09,393 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 272 transitions. Word has length 265 [2022-03-18 00:57:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:09,393 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 272 transitions. [2022-03-18 00:57:09,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 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) [2022-03-18 00:57:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 272 transitions. [2022-03-18 00:57:09,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-03-18 00:57:09,394 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:09,394 INFO L500 BasicCegarLoop]: trace histogram [128, 126, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:09,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:09,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-18 00:57:09,610 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1489249473, now seen corresponding path program 253 times [2022-03-18 00:57:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:09,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [416550626] [2022-03-18 00:57:09,783 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2002257936, now seen corresponding path program 1 times [2022-03-18 00:57:09,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:09,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671623659] [2022-03-18 00:57:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:09,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:09,786 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:09,787 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:09,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1489249473, now seen corresponding path program 254 times [2022-03-18 00:57:09,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:09,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883955162] [2022-03-18 00:57:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:09,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:12,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 381 proven. 16002 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:57:12,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:12,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883955162] [2022-03-18 00:57:12,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883955162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:12,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872671826] [2022-03-18 00:57:12,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:12,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:12,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:12,473 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:57:12,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-18 00:57:12,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:12,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:12,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 128 conjunts are in the unsatisfiable core [2022-03-18 00:57:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 381 proven. 16002 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:57:12,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 381 proven. 16002 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:57:21,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872671826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:21,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:21,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 129, 129] total 258 [2022-03-18 00:57:21,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:21,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [416550626] [2022-03-18 00:57:21,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [416550626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:21,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:21,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-03-18 00:57:21,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648570204] [2022-03-18 00:57:21,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:21,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-03-18 00:57:21,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:21,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-03-18 00:57:21,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32898, Invalid=33408, Unknown=0, NotChecked=0, Total=66306 [2022-03-18 00:57:21,054 INFO L87 Difference]: Start difference. First operand 269 states and 272 transitions. Second operand has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 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) [2022-03-18 00:57:24,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:24,874 INFO L93 Difference]: Finished difference Result 280 states and 286 transitions. [2022-03-18 00:57:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-18 00:57:24,875 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 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 267 [2022-03-18 00:57:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:24,875 INFO L225 Difference]: With dead ends: 280 [2022-03-18 00:57:24,875 INFO L226 Difference]: Without dead ends: 271 [2022-03-18 00:57:24,882 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8756 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=65538, Invalid=82302, Unknown=0, NotChecked=0, Total=147840 [2022-03-18 00:57:24,882 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:24,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 29 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:57:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-03-18 00:57:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-03-18 00:57:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0150375939849625) internal successors, (270), 266 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 274 transitions. [2022-03-18 00:57:24,890 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 274 transitions. Word has length 267 [2022-03-18 00:57:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:24,890 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 274 transitions. [2022-03-18 00:57:24,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 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) [2022-03-18 00:57:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 274 transitions. [2022-03-18 00:57:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-03-18 00:57:24,891 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:24,891 INFO L500 BasicCegarLoop]: trace histogram [129, 127, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:24,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-18 00:57:25,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-03-18 00:57:25,109 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:25,109 INFO L85 PathProgramCache]: Analyzing trace with hash 551430812, now seen corresponding path program 255 times [2022-03-18 00:57:25,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:25,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [488630952] [2022-03-18 00:57:25,355 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2061363280, now seen corresponding path program 1 times [2022-03-18 00:57:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:25,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152946869] [2022-03-18 00:57:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:25,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:25,357 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:25,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:25,359 INFO L85 PathProgramCache]: Analyzing trace with hash 551430812, now seen corresponding path program 256 times [2022-03-18 00:57:25,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:25,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751264572] [2022-03-18 00:57:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:25,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:28,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 384 proven. 16256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:57:28,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:28,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751264572] [2022-03-18 00:57:28,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751264572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:28,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702780450] [2022-03-18 00:57:28,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:57:28,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:28,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:28,174 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:57:28,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-18 00:57:28,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:57:28,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:28,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-18 00:57:28,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 384 proven. 16256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:57:28,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 384 proven. 16256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:57:36,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702780450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:36,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:36,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 130, 130] total 260 [2022-03-18 00:57:36,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:36,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [488630952] [2022-03-18 00:57:36,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [488630952] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:36,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:36,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-03-18 00:57:36,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005093048] [2022-03-18 00:57:36,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:36,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-03-18 00:57:36,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:36,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-03-18 00:57:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33413, Invalid=33927, Unknown=0, NotChecked=0, Total=67340 [2022-03-18 00:57:36,769 INFO L87 Difference]: Start difference. First operand 271 states and 274 transitions. Second operand has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 states have internal predecessors, (265), 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) [2022-03-18 00:57:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:41,049 INFO L93 Difference]: Finished difference Result 282 states and 288 transitions. [2022-03-18 00:57:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-18 00:57:41,050 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 states have internal predecessors, (265), 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 269 [2022-03-18 00:57:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:41,050 INFO L225 Difference]: With dead ends: 282 [2022-03-18 00:57:41,050 INFO L226 Difference]: Without dead ends: 273 [2022-03-18 00:57:41,058 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8889 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=66566, Invalid=83590, Unknown=0, NotChecked=0, Total=150156 [2022-03-18 00:57:41,059 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:41,059 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 44 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:57:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-18 00:57:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2022-03-18 00:57:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.0149253731343284) internal successors, (272), 268 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 276 transitions. [2022-03-18 00:57:41,067 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 276 transitions. Word has length 269 [2022-03-18 00:57:41,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:41,067 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 276 transitions. [2022-03-18 00:57:41,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 states have internal predecessors, (265), 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) [2022-03-18 00:57:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 276 transitions. [2022-03-18 00:57:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-03-18 00:57:41,068 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:41,068 INFO L500 BasicCegarLoop]: trace histogram [130, 128, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:41,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-18 00:57:41,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258,SelfDestructingSolverStorable257 [2022-03-18 00:57:41,284 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:41,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1154869575, now seen corresponding path program 257 times [2022-03-18 00:57:41,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:41,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1467355405] [2022-03-18 00:57:41,468 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:41,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2120468624, now seen corresponding path program 1 times [2022-03-18 00:57:41,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:41,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250363053] [2022-03-18 00:57:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:41,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:41,476 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:41,477 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:41,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1154869575, now seen corresponding path program 258 times [2022-03-18 00:57:41,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:41,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250683587] [2022-03-18 00:57:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:41,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:45,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 387 proven. 16512 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:57:45,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:45,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250683587] [2022-03-18 00:57:45,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250683587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:45,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058475218] [2022-03-18 00:57:45,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:57:45,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:45,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:45,202 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:57:45,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-18 00:57:45,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:57:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:45,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:57:45,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 16512 trivial. 0 not checked. [2022-03-18 00:57:45,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 16512 trivial. 0 not checked. [2022-03-18 00:57:45,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058475218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:45,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:45,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 8, 8] total 142 [2022-03-18 00:57:45,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:45,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1467355405] [2022-03-18 00:57:45,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1467355405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:45,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:45,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-03-18 00:57:45,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037393366] [2022-03-18 00:57:45,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:45,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-03-18 00:57:45,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:45,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-03-18 00:57:45,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8557, Invalid=11465, Unknown=0, NotChecked=0, Total=20022 [2022-03-18 00:57:45,904 INFO L87 Difference]: Start difference. First operand 273 states and 276 transitions. Second operand has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 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) [2022-03-18 00:57:50,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:50,226 INFO L93 Difference]: Finished difference Result 284 states and 290 transitions. [2022-03-18 00:57:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-18 00:57:50,226 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 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 271 [2022-03-18 00:57:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:50,226 INFO L225 Difference]: With dead ends: 284 [2022-03-18 00:57:50,226 INFO L226 Difference]: Without dead ends: 275 [2022-03-18 00:57:50,229 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 533 SyntacticMatches, 1 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10199 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=25585, Invalid=47585, Unknown=0, NotChecked=0, Total=73170 [2022-03-18 00:57:50,229 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:50,229 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 44 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:57:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-18 00:57:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-03-18 00:57:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0148148148148148) internal successors, (274), 270 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 278 transitions. [2022-03-18 00:57:50,237 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 278 transitions. Word has length 271 [2022-03-18 00:57:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:50,238 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 278 transitions. [2022-03-18 00:57:50,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 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) [2022-03-18 00:57:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 278 transitions. [2022-03-18 00:57:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-03-18 00:57:50,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:50,239 INFO L500 BasicCegarLoop]: trace histogram [131, 129, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:50,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:50,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260,SelfDestructingSolverStorable259 [2022-03-18 00:57:50,451 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash -232034410, now seen corresponding path program 259 times [2022-03-18 00:57:50,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1023966899] [2022-03-18 00:57:50,633 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:50,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2115393328, now seen corresponding path program 1 times [2022-03-18 00:57:50,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:50,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96792758] [2022-03-18 00:57:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:50,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:50,636 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:50,639 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:50,639 INFO L85 PathProgramCache]: Analyzing trace with hash -232034410, now seen corresponding path program 260 times [2022-03-18 00:57:50,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:50,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697324355] [2022-03-18 00:57:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:50,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:53,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 390 proven. 16770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:57:53,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:53,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697324355] [2022-03-18 00:57:53,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697324355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:53,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349906528] [2022-03-18 00:57:53,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:53,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:53,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:53,522 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:57:53,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-18 00:57:53,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:53,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:53,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 131 conjunts are in the unsatisfiable core [2022-03-18 00:57:53,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 390 proven. 16770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:57:53,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 390 proven. 16770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:58:02,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349906528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:02,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:02,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 132, 132] total 264 [2022-03-18 00:58:02,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:02,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1023966899] [2022-03-18 00:58:02,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1023966899] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:02,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:02,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-03-18 00:58:02,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978990048] [2022-03-18 00:58:02,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:02,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-03-18 00:58:02,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-03-18 00:58:02,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34455, Invalid=34977, Unknown=0, NotChecked=0, Total=69432 [2022-03-18 00:58:02,787 INFO L87 Difference]: Start difference. First operand 275 states and 278 transitions. Second operand has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 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) [2022-03-18 00:58:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:07,576 INFO L93 Difference]: Finished difference Result 286 states and 292 transitions. [2022-03-18 00:58:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-03-18 00:58:07,576 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 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 273 [2022-03-18 00:58:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:07,576 INFO L225 Difference]: With dead ends: 286 [2022-03-18 00:58:07,577 INFO L226 Difference]: Without dead ends: 277 [2022-03-18 00:58:07,582 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9158 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=68646, Invalid=86196, Unknown=0, NotChecked=0, Total=154842 [2022-03-18 00:58:07,583 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:07,583 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 54 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:58:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-18 00:58:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-03-18 00:58:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0147058823529411) internal successors, (276), 272 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 280 transitions. [2022-03-18 00:58:07,591 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 280 transitions. Word has length 273 [2022-03-18 00:58:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:07,592 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 280 transitions. [2022-03-18 00:58:07,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 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) [2022-03-18 00:58:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 280 transitions. [2022-03-18 00:58:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-18 00:58:07,592 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:07,593 INFO L500 BasicCegarLoop]: trace histogram [132, 130, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:07,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-18 00:58:07,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,SelfDestructingSolverStorable262,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:07,800 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:07,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1849296179, now seen corresponding path program 261 times [2022-03-18 00:58:07,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:07,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233437572] [2022-03-18 00:58:08,066 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2056287984, now seen corresponding path program 1 times [2022-03-18 00:58:08,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:08,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348741581] [2022-03-18 00:58:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:08,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:08,068 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:08,070 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:08,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1849296179, now seen corresponding path program 262 times [2022-03-18 00:58:08,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:08,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286735757] [2022-03-18 00:58:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:08,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:11,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 393 proven. 17030 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:58:11,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:11,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286735757] [2022-03-18 00:58:11,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286735757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:11,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999414751] [2022-03-18 00:58:11,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:58:11,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:11,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:11,410 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:58:11,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-18 00:58:11,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:58:11,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:11,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 132 conjunts are in the unsatisfiable core [2022-03-18 00:58:11,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 393 proven. 17030 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:58:11,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 393 proven. 17030 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:58:20,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999414751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:20,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:20,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 133, 133] total 266 [2022-03-18 00:58:20,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:20,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233437572] [2022-03-18 00:58:20,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233437572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:20,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:20,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-03-18 00:58:20,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573806953] [2022-03-18 00:58:20,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:20,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-18 00:58:20,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:20,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-18 00:58:20,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34982, Invalid=35508, Unknown=0, NotChecked=0, Total=70490 [2022-03-18 00:58:20,493 INFO L87 Difference]: Start difference. First operand 277 states and 280 transitions. Second operand has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 states have internal predecessors, (271), 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) [2022-03-18 00:58:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:24,625 INFO L93 Difference]: Finished difference Result 288 states and 294 transitions. [2022-03-18 00:58:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-18 00:58:24,625 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 states have internal predecessors, (271), 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 275 [2022-03-18 00:58:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:24,626 INFO L225 Difference]: With dead ends: 288 [2022-03-18 00:58:24,626 INFO L226 Difference]: Without dead ends: 279 [2022-03-18 00:58:24,634 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9294 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=69698, Invalid=87514, Unknown=0, NotChecked=0, Total=157212 [2022-03-18 00:58:24,634 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 139 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:24,634 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 49 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:58:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-18 00:58:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2022-03-18 00:58:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.0145985401459854) internal successors, (278), 274 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 282 transitions. [2022-03-18 00:58:24,642 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 282 transitions. Word has length 275 [2022-03-18 00:58:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:24,642 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 282 transitions. [2022-03-18 00:58:24,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 states have internal predecessors, (271), 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) [2022-03-18 00:58:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 282 transitions. [2022-03-18 00:58:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-03-18 00:58:24,643 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:24,643 INFO L500 BasicCegarLoop]: trace histogram [133, 131, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:24,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:24,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,SelfDestructingSolverStorable264,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:24,859 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash 553232272, now seen corresponding path program 263 times [2022-03-18 00:58:24,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:24,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1851240893] [2022-03-18 00:58:24,990 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:24,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1997182640, now seen corresponding path program 1 times [2022-03-18 00:58:24,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:24,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059725852] [2022-03-18 00:58:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:24,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:24,993 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:24,994 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:24,994 INFO L85 PathProgramCache]: Analyzing trace with hash 553232272, now seen corresponding path program 264 times [2022-03-18 00:58:24,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:24,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331461650] [2022-03-18 00:58:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:24,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:28,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 396 proven. 17292 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:58:28,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331461650] [2022-03-18 00:58:28,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331461650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329138484] [2022-03-18 00:58:28,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:58:28,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:28,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:28,057 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:58:28,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-18 00:58:28,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:58:28,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:28,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:58:28,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 17292 trivial. 0 not checked. [2022-03-18 00:58:28,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 17292 trivial. 0 not checked. [2022-03-18 00:58:28,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329138484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:28,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:28,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 8, 8] total 145 [2022-03-18 00:58:28,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:28,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1851240893] [2022-03-18 00:58:28,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1851240893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:28,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:28,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-03-18 00:58:28,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548628934] [2022-03-18 00:58:28,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:28,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-18 00:58:28,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:28,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-18 00:58:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8953, Invalid=11927, Unknown=0, NotChecked=0, Total=20880 [2022-03-18 00:58:28,800 INFO L87 Difference]: Start difference. First operand 279 states and 282 transitions. Second operand has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 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) [2022-03-18 00:58:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:33,070 INFO L93 Difference]: Finished difference Result 290 states and 296 transitions. [2022-03-18 00:58:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-03-18 00:58:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 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 277 [2022-03-18 00:58:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:33,071 INFO L225 Difference]: With dead ends: 290 [2022-03-18 00:58:33,071 INFO L226 Difference]: Without dead ends: 281 [2022-03-18 00:58:33,074 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 545 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10634 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=26773, Invalid=49679, Unknown=0, NotChecked=0, Total=76452 [2022-03-18 00:58:33,074 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 140 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:33,075 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 49 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:58:33,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-18 00:58:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-03-18 00:58:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0144927536231885) internal successors, (280), 276 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 284 transitions. [2022-03-18 00:58:33,083 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 284 transitions. Word has length 277 [2022-03-18 00:58:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:33,083 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 284 transitions. [2022-03-18 00:58:33,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 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) [2022-03-18 00:58:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 284 transitions. [2022-03-18 00:58:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-03-18 00:58:33,084 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:33,084 INFO L500 BasicCegarLoop]: trace histogram [134, 132, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:33,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:33,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265,SelfDestructingSolverStorable266 [2022-03-18 00:58:33,300 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash 576333485, now seen corresponding path program 265 times [2022-03-18 00:58:33,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:33,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1362086618] [2022-03-18 00:58:33,485 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:33,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1938077296, now seen corresponding path program 1 times [2022-03-18 00:58:33,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:33,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691424537] [2022-03-18 00:58:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:33,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:33,488 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:33,489 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash 576333485, now seen corresponding path program 266 times [2022-03-18 00:58:33,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:33,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077120418] [2022-03-18 00:58:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:33,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:36,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 399 proven. 17556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:58:36,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:36,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077120418] [2022-03-18 00:58:36,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077120418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:36,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231532504] [2022-03-18 00:58:36,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:58:36,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:36,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:36,468 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:58:36,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-18 00:58:36,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:58:36,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:36,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 134 conjunts are in the unsatisfiable core [2022-03-18 00:58:36,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 399 proven. 17556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:58:36,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 399 proven. 17556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:58:45,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231532504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:45,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:45,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 135, 135] total 270 [2022-03-18 00:58:45,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:45,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1362086618] [2022-03-18 00:58:45,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1362086618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:45,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:45,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-03-18 00:58:45,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429027539] [2022-03-18 00:58:45,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:45,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-03-18 00:58:45,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:45,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-03-18 00:58:45,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36048, Invalid=36582, Unknown=0, NotChecked=0, Total=72630 [2022-03-18 00:58:45,929 INFO L87 Difference]: Start difference. First operand 281 states and 284 transitions. Second operand has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 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) [2022-03-18 00:58:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:50,224 INFO L93 Difference]: Finished difference Result 292 states and 298 transitions. [2022-03-18 00:58:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-18 00:58:50,224 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 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 279 [2022-03-18 00:58:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:50,225 INFO L225 Difference]: With dead ends: 292 [2022-03-18 00:58:50,225 INFO L226 Difference]: Without dead ends: 283 [2022-03-18 00:58:50,233 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 401 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9569 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=71826, Invalid=90180, Unknown=0, NotChecked=0, Total=162006 [2022-03-18 00:58:50,233 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:50,233 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 49 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:58:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-18 00:58:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-03-18 00:58:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.014388489208633) internal successors, (282), 278 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 286 transitions. [2022-03-18 00:58:50,241 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 286 transitions. Word has length 279 [2022-03-18 00:58:50,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:50,241 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 286 transitions. [2022-03-18 00:58:50,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 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) [2022-03-18 00:58:50,242 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 286 transitions. [2022-03-18 00:58:50,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-03-18 00:58:50,242 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:50,242 INFO L500 BasicCegarLoop]: trace histogram [135, 133, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:50,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-18 00:58:50,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267,SelfDestructingSolverStorable268 [2022-03-18 00:58:50,459 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:50,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:50,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1301762698, now seen corresponding path program 267 times [2022-03-18 00:58:50,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:50,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [334672591] [2022-03-18 00:58:50,670 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1878971952, now seen corresponding path program 1 times [2022-03-18 00:58:50,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:50,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764646865] [2022-03-18 00:58:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:50,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:50,672 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:50,674 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:50,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1301762698, now seen corresponding path program 268 times [2022-03-18 00:58:50,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:50,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731101493] [2022-03-18 00:58:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:50,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:54,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 402 proven. 17822 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:58:54,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731101493] [2022-03-18 00:58:54,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731101493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326548652] [2022-03-18 00:58:54,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:58:54,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:54,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:54,436 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:58:54,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-18 00:58:54,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:58:54,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:54,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 135 conjunts are in the unsatisfiable core [2022-03-18 00:58:54,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 402 proven. 17822 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:58:54,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 402 proven. 17822 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:59:03,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326548652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:03,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:03,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 136, 136] total 272 [2022-03-18 00:59:03,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:03,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [334672591] [2022-03-18 00:59:03,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [334672591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:03,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:03,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-03-18 00:59:03,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242281972] [2022-03-18 00:59:03,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:03,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-03-18 00:59:03,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-03-18 00:59:03,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36587, Invalid=37125, Unknown=0, NotChecked=0, Total=73712 [2022-03-18 00:59:03,954 INFO L87 Difference]: Start difference. First operand 283 states and 286 transitions. Second operand has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 states have internal predecessors, (277), 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) [2022-03-18 00:59:08,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:08,891 INFO L93 Difference]: Finished difference Result 294 states and 300 transitions. [2022-03-18 00:59:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-18 00:59:08,892 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 states have internal predecessors, (277), 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 281 [2022-03-18 00:59:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:08,892 INFO L225 Difference]: With dead ends: 294 [2022-03-18 00:59:08,892 INFO L226 Difference]: Without dead ends: 285 [2022-03-18 00:59:08,899 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9708 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=72902, Invalid=91528, Unknown=0, NotChecked=0, Total=164430 [2022-03-18 00:59:08,899 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:08,899 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 49 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:59:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-18 00:59:08,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-03-18 00:59:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0142857142857142) internal successors, (284), 280 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 288 transitions. [2022-03-18 00:59:08,908 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 288 transitions. Word has length 281 [2022-03-18 00:59:08,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:08,910 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 288 transitions. [2022-03-18 00:59:08,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 states have internal predecessors, (277), 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) [2022-03-18 00:59:08,910 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 288 transitions. [2022-03-18 00:59:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-03-18 00:59:08,911 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:08,911 INFO L500 BasicCegarLoop]: trace histogram [136, 134, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:08,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:09,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270,SelfDestructingSolverStorable269 [2022-03-18 00:59:09,127 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:09,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:09,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1640432857, now seen corresponding path program 269 times [2022-03-18 00:59:09,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:09,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1998077489] [2022-03-18 00:59:09,314 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:09,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1819866608, now seen corresponding path program 1 times [2022-03-18 00:59:09,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:09,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11885821] [2022-03-18 00:59:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:09,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:09,316 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:09,317 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:09,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1640432857, now seen corresponding path program 270 times [2022-03-18 00:59:09,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:09,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314619984] [2022-03-18 00:59:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:09,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:12,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 405 proven. 18090 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:59:12,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:12,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314619984] [2022-03-18 00:59:12,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314619984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:12,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035272497] [2022-03-18 00:59:12,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:59:12,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:12,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:12,503 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:12,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-18 00:59:12,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:59:12,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:12,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:59:12,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 18090 trivial. 0 not checked. [2022-03-18 00:59:13,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 18090 trivial. 0 not checked. [2022-03-18 00:59:13,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035272497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:13,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:13,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 8, 8] total 148 [2022-03-18 00:59:13,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:13,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1998077489] [2022-03-18 00:59:13,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1998077489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:13,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:13,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-03-18 00:59:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074570673] [2022-03-18 00:59:13,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:13,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-03-18 00:59:13,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-03-18 00:59:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9358, Invalid=12398, Unknown=0, NotChecked=0, Total=21756 [2022-03-18 00:59:13,633 INFO L87 Difference]: Start difference. First operand 285 states and 288 transitions. Second operand has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 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) [2022-03-18 00:59:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:18,201 INFO L93 Difference]: Finished difference Result 296 states and 302 transitions. [2022-03-18 00:59:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-18 00:59:18,201 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 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 283 [2022-03-18 00:59:18,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:18,202 INFO L225 Difference]: With dead ends: 296 [2022-03-18 00:59:18,202 INFO L226 Difference]: Without dead ends: 287 [2022-03-18 00:59:18,205 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 557 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11078 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=27988, Invalid=51818, Unknown=0, NotChecked=0, Total=79806 [2022-03-18 00:59:18,206 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:18,206 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 34 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:59:18,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-18 00:59:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-03-18 00:59:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.0141843971631206) internal successors, (286), 282 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 290 transitions. [2022-03-18 00:59:18,217 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 290 transitions. Word has length 283 [2022-03-18 00:59:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:18,217 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 290 transitions. [2022-03-18 00:59:18,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 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) [2022-03-18 00:59:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 290 transitions. [2022-03-18 00:59:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-03-18 00:59:18,219 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:18,219 INFO L500 BasicCegarLoop]: trace histogram [137, 135, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:18,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:18,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,SelfDestructingSolverStorable271,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:18,431 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:18,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:18,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1293086852, now seen corresponding path program 271 times [2022-03-18 00:59:18,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:18,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1100748542] [2022-03-18 00:59:18,721 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:18,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1760761264, now seen corresponding path program 1 times [2022-03-18 00:59:18,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:18,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221149684] [2022-03-18 00:59:18,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:18,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:18,723 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:18,725 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1293086852, now seen corresponding path program 272 times [2022-03-18 00:59:18,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:18,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597098787] [2022-03-18 00:59:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:18,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:22,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 408 proven. 18360 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:59:22,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:22,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597098787] [2022-03-18 00:59:22,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597098787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:22,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892806420] [2022-03-18 00:59:22,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:59:22,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:22,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:22,357 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:22,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-18 00:59:22,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:59:22,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:22,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 137 conjunts are in the unsatisfiable core [2022-03-18 00:59:22,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 408 proven. 18360 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:59:22,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 408 proven. 18360 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:59:32,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892806420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:32,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:32,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 138, 138] total 276 [2022-03-18 00:59:32,335 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:32,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1100748542] [2022-03-18 00:59:32,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1100748542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:32,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:32,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-03-18 00:59:32,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803207191] [2022-03-18 00:59:32,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:32,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-03-18 00:59:32,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:32,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-03-18 00:59:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37677, Invalid=38223, Unknown=0, NotChecked=0, Total=75900 [2022-03-18 00:59:32,340 INFO L87 Difference]: Start difference. First operand 287 states and 290 transitions. Second operand has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 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) [2022-03-18 00:59:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:36,819 INFO L93 Difference]: Finished difference Result 298 states and 304 transitions. [2022-03-18 00:59:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-18 00:59:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 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 285 [2022-03-18 00:59:36,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:36,820 INFO L225 Difference]: With dead ends: 298 [2022-03-18 00:59:36,820 INFO L226 Difference]: Without dead ends: 289 [2022-03-18 00:59:36,830 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9989 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=75078, Invalid=94254, Unknown=0, NotChecked=0, Total=169332 [2022-03-18 00:59:36,830 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:36,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 44 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:59:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-03-18 00:59:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-03-18 00:59:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0140845070422535) internal successors, (288), 284 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 292 transitions. [2022-03-18 00:59:36,839 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 292 transitions. Word has length 285 [2022-03-18 00:59:36,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:36,839 INFO L478 AbstractCegarLoop]: Abstraction has 289 states and 292 transitions. [2022-03-18 00:59:36,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 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) [2022-03-18 00:59:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 292 transitions. [2022-03-18 00:59:36,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-03-18 00:59:36,867 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:36,867 INFO L500 BasicCegarLoop]: trace histogram [138, 136, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:36,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:37,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,SelfDestructingSolverStorable274,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:37,067 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:37,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:37,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1387986271, now seen corresponding path program 273 times [2022-03-18 00:59:37,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:37,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1877692406] [2022-03-18 00:59:37,209 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1701655920, now seen corresponding path program 1 times [2022-03-18 00:59:37,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:37,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293869247] [2022-03-18 00:59:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:37,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:37,212 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:37,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:37,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1387986271, now seen corresponding path program 274 times [2022-03-18 00:59:37,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:37,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575800362] [2022-03-18 00:59:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:37,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:40,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:59:40,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:40,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575800362] [2022-03-18 00:59:40,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575800362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:40,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177991349] [2022-03-18 00:59:40,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:59:40,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:40,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:40,457 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:40,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-18 00:59:40,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:59:40,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:40,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-18 00:59:40,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:59:40,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:59:50,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177991349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:50,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:50,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-18 00:59:50,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:50,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1877692406] [2022-03-18 00:59:50,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1877692406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:50,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:50,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-03-18 00:59:50,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876186843] [2022-03-18 00:59:50,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:50,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-18 00:59:50,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-18 00:59:50,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-18 00:59:50,795 INFO L87 Difference]: Start difference. First operand 289 states and 292 transitions. Second operand has 140 states, 140 states have (on average 2.0214285714285714) internal successors, (283), 139 states have internal predecessors, (283), 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) [2022-03-18 00:59:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:55,409 INFO L93 Difference]: Finished difference Result 300 states and 306 transitions. [2022-03-18 00:59:55,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-18 00:59:55,409 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0214285714285714) internal successors, (283), 139 states have internal predecessors, (283), 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 287 [2022-03-18 00:59:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:55,410 INFO L225 Difference]: With dead ends: 300 [2022-03-18 00:59:55,410 INFO L226 Difference]: Without dead ends: 291 [2022-03-18 00:59:55,418 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10131 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=76178, Invalid=95632, Unknown=0, NotChecked=0, Total=171810 [2022-03-18 00:59:55,418 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 145 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:55,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 59 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:59:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-18 00:59:55,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-03-18 00:59:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.013986013986014) internal successors, (290), 286 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:55,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 294 transitions. [2022-03-18 00:59:55,427 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 294 transitions. Word has length 287 [2022-03-18 00:59:55,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:55,427 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 294 transitions. [2022-03-18 00:59:55,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0214285714285714) internal successors, (283), 139 states have internal predecessors, (283), 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) [2022-03-18 00:59:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 294 transitions. [2022-03-18 00:59:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-03-18 00:59:55,428 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:55,428 INFO L500 BasicCegarLoop]: trace histogram [139, 137, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:55,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:55,645 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275,SelfDestructingSolverStorable276 [2022-03-18 00:59:55,645 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:55,645 INFO L85 PathProgramCache]: Analyzing trace with hash -918879874, now seen corresponding path program 275 times [2022-03-18 00:59:55,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:55,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1006989897] [2022-03-18 00:59:55,798 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1642550576, now seen corresponding path program 1 times [2022-03-18 00:59:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:55,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63323110] [2022-03-18 00:59:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:55,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:55,801 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:55,803 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:55,803 INFO L85 PathProgramCache]: Analyzing trace with hash -918879874, now seen corresponding path program 276 times [2022-03-18 00:59:55,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:55,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423284302] [2022-03-18 00:59:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:55,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:59,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 19321 backedges. 414 proven. 18906 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:59:59,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:59,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423284302] [2022-03-18 00:59:59,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423284302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:59,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800937973] [2022-03-18 00:59:59,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:59:59,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:59,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:59,203 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:59,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-18 00:59:59,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:59:59,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:59,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:59:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 19321 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 18906 trivial. 0 not checked. [2022-03-18 00:59:59,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 19321 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 18906 trivial. 0 not checked. [2022-03-18 01:00:00,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800937973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:00,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:00,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 8, 8] total 151 [2022-03-18 01:00:00,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:00,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1006989897] [2022-03-18 01:00:00,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1006989897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:00,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:00,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-03-18 01:00:00,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574955474] [2022-03-18 01:00:00,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:00,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-03-18 01:00:00,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:00,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-03-18 01:00:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9772, Invalid=12878, Unknown=0, NotChecked=0, Total=22650 [2022-03-18 01:00:00,070 INFO L87 Difference]: Start difference. First operand 291 states and 294 transitions. Second operand has 141 states, 141 states have (on average 2.021276595744681) internal successors, (285), 140 states have internal predecessors, (285), 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) [2022-03-18 01:00:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:06,149 INFO L93 Difference]: Finished difference Result 302 states and 308 transitions. [2022-03-18 01:00:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-03-18 01:00:06,150 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.021276595744681) internal successors, (285), 140 states have internal predecessors, (285), 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 289 [2022-03-18 01:00:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:06,150 INFO L225 Difference]: With dead ends: 302 [2022-03-18 01:00:06,150 INFO L226 Difference]: Without dead ends: 293 [2022-03-18 01:00:06,155 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 569 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11531 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=29230, Invalid=54002, Unknown=0, NotChecked=0, Total=83232 [2022-03-18 01:00:06,155 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 146 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:06,156 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 44 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 01:00:06,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-18 01:00:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2022-03-18 01:00:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.0138888888888888) internal successors, (292), 288 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 296 transitions. [2022-03-18 01:00:06,164 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 296 transitions. Word has length 289 [2022-03-18 01:00:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:06,164 INFO L478 AbstractCegarLoop]: Abstraction has 293 states and 296 transitions. [2022-03-18 01:00:06,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.021276595744681) internal successors, (285), 140 states have internal predecessors, (285), 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) [2022-03-18 01:00:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 296 transitions. [2022-03-18 01:00:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-03-18 01:00:06,165 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:06,165 INFO L500 BasicCegarLoop]: trace histogram [140, 138, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:06,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:06,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277,SelfDestructingSolverStorable278 [2022-03-18 01:00:06,382 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:06,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:06,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1079198437, now seen corresponding path program 277 times [2022-03-18 01:00:06,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:06,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1625405990] [2022-03-18 01:00:06,609 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:00:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1583445232, now seen corresponding path program 1 times [2022-03-18 01:00:06,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:06,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503256191] [2022-03-18 01:00:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:06,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:06,620 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:06,621 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:06,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1079198437, now seen corresponding path program 278 times [2022-03-18 01:00:06,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:06,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758997454] [2022-03-18 01:00:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:06,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:11,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19600 backedges. 417 proven. 19182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 01:00:11,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:11,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758997454] [2022-03-18 01:00:11,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758997454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:11,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300329340] [2022-03-18 01:00:11,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:00:11,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:11,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:11,368 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:11,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-18 01:00:11,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:00:11,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:11,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 140 conjunts are in the unsatisfiable core [2022-03-18 01:00:11,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19600 backedges. 417 proven. 19182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 01:00:11,705 INFO L328 TraceCheckSpWp]: Computing backward predicates...